JP6577225B2 - Valve opening meter and gate valve with opening meter - Google Patents

Description

  The present invention relates to a valve opening meter, and more particularly to an opening meter that displays the opening of a valve element connected to a valve rod to the outside via a reduction gear mechanism and a gate valve with an opening meter.

Conventionally, an opening meter for checking the opening degree of a valve body is usually provided in a valve such as an internally threaded gate valve, in which it is difficult to directly check the opening degree of the valve body from the amount of rotation of the valve rod. . A reduction gear mechanism is generally provided inside this kind of opening meter, and the rotation of the valve rod of the gate valve is reduced by this reduction gear mechanism to obtain the valve opening. Check from outside of the valve.
Gate valves equipped with opening gauges are often used in underground locations such as underground piping and manhole bottom positions. In this case, mud is attached because the opening gauge is exposed to the ground. It becomes easy. If mud enters into the opening meter, it may not be possible to display the correct opening or it may lead to failure. For the opening meter for the gate valve, mud etc. may enter the gate after it is installed on the gate valve. It is required that it can be prevented.

  As such an opening meter, for example, an opening meter of Patent Document 1 is disclosed. In this opening meter, the reduction gear mechanism is housed in a sealed container, so that mud is prevented from entering. The opening meter is provided with a hub. A claw portion is formed on the upper surface of the hub, and the claw portion is attached to the gate valve while being engaged with a concave portion of a bottom surface of a cap attached to the valve rod. Thus, when the valve stem rotates, the rotation is transmitted from the cap to the hub via the claw portion and the recess, and the rotation of the valve stem is decelerated by the reduction gear mechanism via this hub and displayed as the valve opening. The

  In the gate valve opening meter of Patent Document 2, a cap is connected to an upper rotating body via a connecting pin, and the rotation of the cap that rotates together with the valve rod can be transmitted to the rotating body via the connecting pin. Mounted. On the other hand, a polygonal hole is formed on the bottom face side of the opening meter on the gate valve mounting side, and a projecting polygonal part formed on the upper part of the gate valve is fitted into this hole. And attached to the gate valve in a non-rotating state.

  In the opening meter of the valve device of Patent Document 3, a bolt is attached to a cap attached to a valve stem in the crossing direction, and this bolt is cut off of an upright wall formed on an eccentric plate provided on the upper side of the speed reduction mechanism. It is attached to the valve device while being locked to the mounting portion. Thereby, the rotation of the valve stem is transmitted from the cap to the eccentric plate via the fixing bolt, and the rotation of the valve rod is transmitted from the eccentric plate.

  On the other hand, the gate valve may be provided with a valve opening meter having the structure shown in FIG. In the opening meter 1, a bush 4 is inserted from the bottom surface side of the scale body 3 having the scale portion 2, and a valve rod 5 is fitted and inserted into the bush 4. The bush 4 is positioned in the vertical direction with the annular protrusion 4a on the outer periphery of the lower portion being engaged with the step 3a of the scale body 3, and the presser ring 6 is mounted on the upper portion of the bush 4 in a non-rotating state by fitting the concave and convex portions. . The presser ring 6 is provided with a hexagon socket set screw 7, and the presser ring 6 is fixed to the valve stem 5 by screwing the set screw 7 into a locking groove 5 a formed on the outer periphery of the valve stem 5. The rod 5 and the bush 4 are rotated together in a fixed state. In FIG. 20, between the presser ring 6 and the scale body 3, an annular hub member 8 is mounted on the bushing 4 by concave and convex fitting similarly to the presser ring 6, whereby the valve stem 5, bushing 4, and hub member are mounted. The eight rotations are synchronized. An annular pointer body 9 is interposed between the hub member 8 and the scale body 3, and an external gear 11 that meshes with an internal gear 10 formed on the scale body 3 is mounted in the scale body 3. . The hub member 8, the pointer body 9, and the scale body 3 are incorporated coaxially by the bush 4 and are provided so as to be rotatable around the valve stem 5.

  A concave polygonal portion 13 is formed on the bottom surface on the attachment side to the bulb 12 as in the case of Patent Document 2, and the convex polygonal portion 14 formed on the upper portion of the bulb 12 is fitted into the concave polygonal portion 13. Combined, the opening meter 1 is attached to the valve 12. A cap member 15 is attached to the valve stem 5, and there is a gap G between the cap member 15 and the opening meter 1, and the opening meter 1 is installed by a thrust washer 16 and a wave washer 17 interposed in the gap G. Is prevented from being idle due to floating from the valve 12.

  By the way, the maximum height of the valve is determined by the standard. For example, the maximum height of the soft seal gate valve is determined in JWWA B 120 (water soft seal gate valve) of the Japan Water Works Association standard. Yes. When burying a gate valve for underground use in water pipes, it is desirable to lower the overall height and reduce the depth of pipe laying. Will also be possible. For this reason, when a valve body with no opening meter and a valve with an opening meter are used in common, the valve with an opening meter should be low in accordance with the height of the valve without an opening meter. It is required to be manufactured as follows.

Japanese Patent No. 3741566 Japanese Patent No. 3470283 Japanese Patent No. 3742708

  In the above-described opening meter of Patent Document 1, since the speed reduction gear mechanism is housed in a sealed container, there arises a problem that the entire size is increased. In particular, from the upper surface side of the hub, that is, from the opening meter body. In addition, since the cap is engaged with the upper portion, the overall height including the valve is increased, and the JWWA B 120 standard may not be satisfied. Furthermore, in this opening meter, since the sealing packing for preventing muddy soil intrusion into the casing is provided, the structure becomes more complicated and the whole size becomes larger. A transparent plate is required to visually recognize the pointer in the sealed container from the outside, and the display part such as scales is attached to this transparent plate, making it cumbersome and difficult to reduce costs. Become.

  In the gate valve opening meter of Patent Document 2, the cap is connected to the upper part of the rotating body via a connecting pin, so that the overall height after mounting on the valve is increased. In addition, the polygonal part formed on the upper part of the gate valve is fitted to the polygonal hole, and this gate valve is installed, so that the gate valve that can be installed can be fitted into the polygonal hole. The body shape is limited.

In Patent Document 3, the bolt provided on the cap is structured to be locked to the cut portion of the standing wall protruding above the eccentric plate. The rotation of the cap is transmitted through the formed standing wall, and an eccentric force is applied from the cap side.
Furthermore, since a plate having a through hole for inserting a valve rod is provided on the center side of the eccentric plate, and the valve cap is disposed above the plate, the mounting position of the valve cap is increased. On the center side of the scale plate, a plate having a central hole for mounting to the valve shaft mounting portion is provided, and this plate is placed on the valve shaft mounting portion, so the mounting position of the scale plate material to the valve is high. Become. As a result, the overall height after mounting on the valve increases.

19 is attached so that the cap member 15 is disposed above the hub member 8 and the scale body 3 is placed on the upper surface of the shaft mounting portion of the valve 12 as in Patent Document 3. As a result, the overall height increases.
When the valve opening meter 1 is provided in the underground valve 12, the gap G between the scale body 3 and the packing mounting portion 18 above the valve 12, the gap G between the cap member 15 and the bush 4, and the scale body 3 There is a possibility that mud or the like may enter from between the pointer body 9 and between the pointer body 9 and the hub member 8, and when these enter the internal reduction gear mechanism, a malfunction occurs and an accurate opening degree is set. You may not be able to display.
In the opening meter 1, the bottom surface of the cap member 15 is positioned above the upper surface of the bush 4, and the gap G is provided, so that the entire installation height is increased. Since the thrust washer 16 and the wave washer 17 are incorporated, the valve stem 5 and the opening meter 1 are fixed with the set screw 7, and an adhesive work for closing the gap between the presser ring 6 and the hub member 8 is also required. The attachment / detachment work becomes complicated.
Furthermore, since the valve stem 5 is attached via the bush 4, when attaching to the valve 12 having a different valve stem diameter, it is necessary to provide a different bush 4 for each nominal diameter of the valve 12. Thus, the diameter of the connectable valve 12 is limited by using the bush 4, and it is necessary to prepare a different opening meter 1 for each nominal diameter of the valve 12.
On the bottom side of the opening meter 1, the convex polygon portion 14 is fitted to the concave polygon portion 13 and attached to the valve 12, so that the usable valve 12 can be fitted to the concave polygon portion 13. It is limited to what has the convex polygonal part 14. FIG.

  The present invention has been developed to solve the above-described problems, and the object of the present invention is particularly suitable for a valve suitable for displaying the valve opening degree of a valve embedded in the ground outside. It is an opening meter, and it can be used for valves embedded in shallow positions by keeping the overall height of the valve low after mounting while accurately displaying the valve opening by preventing mud from entering the inside. And it is providing the valve opening meter and the gate valve with an opening meter of the compact and simple structure which can be provided in the valve | bulb of various diameters.

In order to achieve the above object, the invention according to claim 1 is provided with an opening meter body around the valve shaft of the valve body, and the opening meter body is provided with a speed reducer provided inside the dial, the pointer plate, and the hub. a opening degree meter valve consisting of the gear mechanism, the mounting cap for the valve shaft rotation to a non-rotating state to the upper end of the valve shaft, the lower portion of the cap in a state of being charged into the opening of the hub of the opening of the hub the inner periphery notches formed on the side surfaces of the caps to the engagement projection which projects toward the center groove engaged, the valve engaging portion is a plurality of guides disposed radially on the lower surface of the eye Sakariban Engage with a locking part provided in the shaft mounting part mounted on the shaft, and also insert a valve shaft into the valve shaft insertion opening to be inserted into the hub and the scale plate following this opening. The inner diameter of the shaft opening is larger than the outer diameter of the upper part of the shaft mounting part inserted into the opening of the dial. Parts are by opening meter valve having an opening diameter which can enter instrumentation various valve shaft of the different valve shaft diameters.

The invention according to claim 2 is a valve opening meter in which a seal ring is mounted between the outer periphery of the shaft mounting portion and the inner periphery of the opening of the scale plate .

The invention according to claim 3 is the valve opening meter in which the hub is formed with a larger diameter than the upper surface portion of the pointer plate, and the pointer plate is formed with a larger diameter than the upper surface portion of the dial .

According to a fourth aspect of the present invention, the valve main body incorporates a gate valve body, and the shaft mounting portion is a valve opening meter that is a packing box of the gate valve .

  According to the first aspect of the present invention, the engaging portion provided on the dial plate is engaged with the engaging portion provided on the shaft mounting portion, and the engaging protrusion provided on the inner peripheral surface of the opening portion of the hub is engaged with the cap. By engaging the notch formed in the lower part, the hub and the cap are overlapped in the vertical direction by overlapping the engagement protrusion and the notch in the axial direction, that is, the opening of the cap at the opening of the hub. Since the lower part is in the middle, the overall height of the valve after the cap is attached can be reduced by the amount of overlap, and it can also be used for valves embedded in shallow locations in the soil. . As a result, the valve for attaching the opening meter and the valve not for attaching the opening meter can be made common, and can be attached later to a valve without the opening meter. Without having to separately provide power transmission parts on the valve shaft, it can be mounted on the valve shaft of various calibers, and the power is transmitted directly from the cap to the hub, making the structure simple and compact. .

In addition, by engaging each side surface of the notch groove of the cap with the engaging protrusion provided at the rotationally symmetric position of the inner peripheral surface of the opening, the rotational force of the cap is evenly transmitted to the hub, and the reduction gear mechanism is smoothly operated. Can work. Therefore, the opening degree can be accurately displayed while suppressing the burden on the reduction gear mechanism.

In addition, an engaging protrusion is provided at one or a plurality of locations on the inner peripheral surface of the opening where power can be transmitted, and the rotational force of the cap is reduced by engaging the side surface of the notch groove of the cap with this engaging protrusion. The transmission can be transmitted to the hub to operate the reduction gear mechanism, and the opening degree can be accurately displayed while suppressing the burden on the reduction gear mechanism.

Furthermore, it can be positioned and mounted on the shaft mounting portion of the valve while aligning, and can be easily attached to a valve having a different nominal diameter in a predetermined state.

In addition, by mounting a plurality of radial ribs on the outer periphery of the shaft mounting section with a pair of radially provided guides, the center of the valve shaft and the center of the valve body are aligned with each other. it can. For this reason, it is not necessary to fit the valve shaft to the opening for inserting the valve shaft, and the opening for inserting the valve shaft can be made larger than the valve stem in advance. It can be installed while using a common valve with a nominal diameter of.

According to the second aspect of the present invention, the gap between the opening meter main body and the valve main body is sealed, so that intrusion of mud or the like is prevented and the lift of the opening meter main body is reliably prevented.

According to the third aspect of the present invention, the gaps between the scale plate and the pointer plate and between the pointer plate and the hub are hidden from the upper side, and intrusion of mud or the like flowing from the upper side is prevented.

According to the invention of claim 4, the amount of rotation of the valve shaft can be decelerated via an opening meter, and the valve opening can be easily confirmed from the outside, and is used by being buried in underground piping or the bottom position of a manhole. In this case, it is possible to prevent the mud from entering the inside to prevent an abnormal display or failure of the opening meter, and to accurately display the rotation operation of the gate valve body to the outside. The entire height of the valve body can be lowered by installing the opening meter while closing the gap with the packing box.

1 is a half-sectional view showing a first embodiment of a valve opening degree meter of the present invention. It is a separation perspective view showing a reduction gear mechanism. It is the expanded sectional view which showed the A section of FIG. It is the schematic diagram which showed the relationship between an engaging protrusion and a notch groove. It is a bottom view which shows a hub. It is the schematic diagram which showed the relationship between a scale board and a valve body. FIG. 2 is an enlarged plan view of FIG. 1. It is the schematic diagram which showed the relationship between an internal tooth and an external tooth. It is the schematic diagram which showed the relationship between a spur gear and a valve shaft. (A) is a top view which shows a spur gear. (B) is a bottom view showing a pointer plate. FIG. 6 is a half-sectional view showing a second embodiment of the valve opening degree meter of the present invention. It is the schematic diagram which showed the relationship between the engagement protrusion of FIG. 11, and a notch groove. It is a schematic diagram which shows 3rd Embodiment of the opening degree meter for valves of this invention. FIG. 6 is a half-sectional view showing a fourth embodiment of the valve opening degree meter of the present invention. FIG. 10 is a half-sectional view showing a fifth embodiment of the valve opening degree meter of the present invention. FIG. 10 is a half-sectional view showing a sixth embodiment of the valve opening degree meter of the present invention. (A) is a half-sectional view showing a seventh embodiment of the valve opening degree meter of the present invention. (B) is a half-sectional view showing an eighth embodiment of the valve opening degree meter of the present invention. It is sectional drawing which shows embodiment of the gate valve with an opening meter. And FIG. 6 is a half-sectional view showing a conventional valve opening degree meter. FIG. 20 is a partially omitted schematic plan view of the valve opening degree meter of FIG. 19.

Embodiments of a valve opening meter according to the present invention will be described below in detail with reference to the drawings.
1 is a sectional view showing a first embodiment of the valve opening meter of the present invention, FIG. 2 is an exploded perspective view of a reduction gear mechanism, and FIG. 3 is an enlarged sectional view of a portion A in FIG. Yes.

  The valve opening meter of the present invention is provided with an opening meter body 30 around the valve shaft 22 of the shaft mounting portion 21 of the valve body 20, and the rotation of a valve shaft turning cap 31 provided on the valve shaft 22 so as not to rotate. The degree of opening and closing of the opening meter body 30 is displayed by movement, and the opening meter body 30 includes a scale plate 32, a pointer plate 33, a hub 34, and a reduction gear mechanism 35.

  On the bottom surface side of the cap 31 that rotates the valve shaft 22, a concave portion 37 is formed into which a parallel four-surface portion 36 formed on the upper portion of the valve shaft 22 can be fitted. The parallel four-surface portion 36 and the concave portion 37 are formed. And the cap 31 is attached to the upper part of the valve shaft 22 by fixing them with a set screw 38. In the lower part of the cap 31, notch portions 39 made of notch grooves are formed at a plurality of positions at equal intervals. In this embodiment, the notch grooves 39 are provided at two positions at intervals of 180 ° as shown in FIG. It is done.

  A prism portion 40 is formed on the upper portion of the cap 31, and this prism portion 40 is provided so as to be able to engage non-rotatably with an engagement surface 41 a of a rotating jig 41 such as a manual handle. The cap 31 can be rotated by a rotation jig 41, and the valve shaft 22 can be rotated by the rotation of the cap 31.

  The cap 31 shown in FIG. 1, for example, is extended downward by a length X in order to meet the standards of the water valve industry association, but the valve opening meter of the present invention shown in FIG. As shown in the second embodiment, a notch groove 39 may be formed in the lower portion of the side surface of the concave portion 37 without providing a length X portion, and the overall height of the cap 31 may be reduced. In this case, the set screw 38 can be concealed inside the annular cover 42 described later, and the rust prevention process for the set screw 38 can be omitted.

  As shown in FIGS. 1 and 6, a plurality of engaging portions 50, which are a pair of guides, are provided radially on the lower surface of the scale plate 32, and the guides 50 are arranged on the outer periphery of the shaft mounting portion 21 of the valve body 20. It is provided so that it can be engaged so that the latching | locking part 51 which is the some rib rib provided in the radial direction may be clamped. The protruding ribs 51 in the present embodiment are formed at four positions on the shaft mounting portion 21 at equal intervals in a cross shape. When the guide 50 is engaged with the ridge rib 51, the opening meter body 30 can be attached to the valve body 20 with the valve shaft 22 and the scale plate 32 aligned. In order to center the scale plate 32 and the shaft mounting portion 21, it is desirable that the guide 50 and the protruding rib 51 are provided in at least three places.

  As shown in FIG. 3, an upward annular convex portion 52 is formed on the upper surface side of the scale plate 32, and an upper surface portion 32 a on which the pointer plate 33 is placed is annularly provided following the annular convex portion 52. The upper surface portion 32a has a slope inclined outward.

1 to 3, an opening having a diameter larger than that of the valve shaft 22 is provided at the center of the scale plate 32, and an engaging portion 56 protrudes upward on the inner peripheral edge side of the opening 55. A projecting portion 57 is provided on the inner periphery of the tip of the engaging portion 56. As shown in FIGS. 1 and 11, the upper part of the shaft mounting part in which the shaft mounting part 21 is inserted into the opening 55 of the scale plate 32 with the inner peripheral diameter of the opening 70 of the hub 34 and the opening 55 of the scale plate 32. The openings 55 and 70 are larger than the outer peripheral diameter.

  A housing recess 58 is formed on the outer periphery of the opening 55, and external teeth 59 are integrally formed on the inner periphery of the housing recess 58. The external teeth 59 are, for example, a pitch circle diameter of 89 and 1/3 mm. The number of teeth is 60, and the pitch is 4.68 mm. The accommodation recess 58 accommodates an internal tooth 61 of a spur gear 60 described later in mesh with the external tooth 59. The internal teeth 61 and the external teeth 59 are formed with different numbers of teeth.

  In FIG. 7, a scale 62 is provided on the outer peripheral side of the upper surface of the scale board 32 at an appropriate position, shape, and interval by printing, sticking a sticker, and the like. Can be displayed.

1 and 2, the pointer plate 33 is provided in an annular shape and has a larger diameter than the upper surface portion 32 a of the scale plate 32. On the upper surface side of the pointer plate 33, a pointer portion 33 b such as an arrow for displaying an opening degree is provided, and on the center side of the pointer plate 33, an upward annular convex portion 64 is formed like the scale plate 32. The The portion of the pointer plate 33 on which the hub 34 is mounted is provided with an upper surface portion 33a in an annular shape, and the upper surface portion 33a has a slope inclined outward.
As shown in FIG. 10B, four engagement recesses 33c are formed at equal intervals on the lower surface side of the pointer plate 33, and an annular recess 66 is formed on the outer diameter side of the engagement recess 33c. Is formed. Further, an annular outer peripheral bottom surface 33d is formed on the outermost diameter side of the lower surface, and the outer peripheral bottom surface 33d is provided so as to be able to contact the upper surface portion 32a.

  1 to 5, the hub 34 is formed in an annular shape and has a larger diameter than the upper surface portion 33 a of the pointer plate 33. As shown in FIGS. 5 and 8, an annular eccentric portion 34a that is eccentric from the center by a predetermined eccentric amount δ protrudes from the bottom side of the hub 34, and the rotation of the valve shaft 22 is caused by this eccentric portion 34a. Is transmitted to the reduction gear mechanism 35. An annular recess 67 is formed on the outer diameter side of the eccentric portion 34a. An opening 70 having a larger diameter than the outer diameter of the valve shaft 22 is provided at the center of the hub 34, and an engagement protrusion 71 is formed to project toward the center on the inner peripheral surface of the opening 70. An annular locking recess 34b is formed in the upper portion of the hub 34, and an annular outer peripheral bottom surface 34c is formed on the outermost diameter side of the lower surface. The outer peripheral bottom surface 34c is provided so as to be able to contact the upper surface portion 33a.

As shown in FIGS. 1 to 5, the engagement protrusion 71 is provided at a rotationally symmetric position on the inner peripheral surface of the opening 70. In the present embodiment, 180 is the same as the notch groove 39 as shown in FIGS. 4 and 5. The engagement protrusions 71 are engaged with the respective side surfaces of the notch groove 39 of the cap 31 fitted in the open portion 70 in a loosely fitted state. These notch grooves 39 and engaging protrusions 71 may be provided at three or more locations.
On the inner diameter side of the eccentric portion 34 a of the hub 34, an engaging portion 72 is formed to protrude downward, and a protruding portion 73 is provided on the outer periphery of the distal end of the engaging portion 72.

The reduction gear mechanism 35 is a planetary gear mechanism, and is provided in the opening meter main body 30 and includes a mechanism that is operated by the hub 34, the spur gear 60, the dial 32, and the pointer plate 33.
As shown in FIG. 2, the spur gear 60 is provided with the above-described internal teeth 61 at a lower position inside, and a protrusion 60 a that is fitted and attached to the eccentric portion 34 a of the hub 34 is formed on the upper surface side. Through these, the upper side of the spur gear 60 is rotatably attached to the eccentric portion 34a. The internal teeth 61 are composed of, for example, pitch circle diameters: 94 and 2/3 mm, number of teeth: 61, pitch: 4.88 mm. As shown in FIG. 10A, four engaging convex portions 60b are formed at equal intervals on the outer periphery of the protruding portion 60a.

  As shown in FIGS. 8 and 9, the spur gear 60 is attached to the eccentric portion 34 a of the hub 34 and is in an eccentric state with respect to the scale plate 32, and the external teeth 59 mesh with the internal teeth 61 when the hub 34 rotates. On the other hand, it revolves while rotating inside the accommodation recess 58. Although not shown, the pitch circle diameter of the outer teeth 59 and the pitch circle diameter of the inner teeth 61 may be values close to each other so that the gap on the opposite side to the meshing side is about 2 mm. In this case, it is possible to prevent the gears from slipping by making the pitch between the external teeth 59 and the internal teeth 61 close to increase the meshing size of the gears.

  In FIG. 2, when the opening meter main body 30 is incorporated, the spur gear 60 is accommodated in the accommodating recess 58 of the scale plate 32, and the scale plate 32 is attached to the pointer plate 33. In this case, as shown in FIG. 3, the pointer plate 33 and the scale plate 32 are coaxially positioned by fitting the annular projection 52 of the scale plate 32 into the annular recess 66 of the pointer plate 33 from below. In addition, when the engagement convex portion 60b of the spur gear 60 is engaged with the engagement concave portion 33c of the pointer plate 33, when the spur gear 60 rotates by the swinging rotation, the guide gear is rotated along with this rotation. The plate 33 rotates and the pointer portion 33b displays the opening of the scale 62 of the scale plate 32, so that the opening of the valve body 20 can be visually recognized from the outside.

  Subsequently, the scale plate 32 is integrally attached to the hub 34 by attaching the pointer plate 33 to the hub 34. In this case, the pointer plate 33 and the hub 34 are coaxially positioned by fitting the annular protrusion 64 of the pointer plate 33 into the annular recess 67 of the hub 34 from below, and the protrusions 57 and 73 are connected to each other. The opening meter main body 30 can be integrated by snap fitting the engaging portions 56 and 72 having the engagement portion 56 and 72 to engage the pointer plate 33 and the scale plate 32.

  1, the height H of the guide 50 is larger than the clearance L in the vertical direction between the engaging protrusion 71 and the notch groove 39. As shown in FIG. Thus, even when the opening meter main body 30 moves after the mounting to the valve main body 20 until the engaging projection 71 contacts the upper end of the notch groove 39, the pinching state of the protruding rib 51 by the guide 50 is maintained. The

  Furthermore, in the opening meter main body 30 in the present embodiment, as shown in FIG. 1, a rubber annular cover 42 is provided between the cap 31 and the hub 34. The cover 42 is attached so that the lower portion is hooked on the locking recess 34 b of the hub 34 and the upper portion is locked to the locking portion 31 a formed on the side surface of the cap 31. It fixes between the latching recessed part 34b and the latching | locking part 31a in the closely_contact | adhered state. As a result, the gap S between the cap 31 and the hub 34 is covered, and entry of mud, water, dust, etc. from the outside is prevented.

  In this case, when the hub 34 is pressed downward by the locking portion 31 a and a force is applied in the direction in which the scale plate 32 is pressed against the shaft mounting portion 21, the opening meter body 30 is lifted from the shaft mounting portion 21. Is prevented.

  A sealing O-ring 75 is mounted between the outer peripheral side of the shaft mounting portion 21 and the inner peripheral side of the lower surface of the scale plate 32, and this O-ring 75 creates a gap between the opening meter main body 30 and the valve main body 20. Sealed to prevent intrusion of mud or the like from between them. As described above, the O-ring 75 is prevented from being lifted off by the opening meter main body 30 from being lifted up.

  Further, the pressing of the hub 34 by the cover 42 closes the vertical gaps between the hub 34 and the pointer plate 33, and the pointer plate 33 and the scale plate 32, thereby preventing intrusion of muddy water or the like. In this case, as described above, the cap 42 and the opening meter body 30 are aligned with the cover 42 because the lower portion of the cover 42 is in close contact with the engaging recess 34b and the upper portion is in close contact with the engaging portion 31a. By attaching the opening meter main body 30, the operation can be smoothly performed.

Next, the operation of the planetary gear mechanism 35 when the valve shaft 22 rotates will be described.
As described above, in FIG. 1, the pointer plate 33, the spur gear 60, and the hub 34 are provided on the scale plate 32 to form the planetary gear mechanism 35, and the cap 31 is against the planetary gear mechanism 35. When the rotation is transmitted from the valve shaft 22 to the valve shaft 22, the rotation is transmitted to the hub 34 from the engagement protrusion 71 locked in the notch groove 39 of the cap 31, and the hub 34 rotates.

  8 and 9, when the hub 34 rotates, the spur gear 60 attached to the hub 34 in an eccentric state rotates while a part of the inner teeth 61 mesh with the outer teeth 59 of the dial 32. As a result, the spur gear 60 rotates while revolving.

  In this case, by providing the number of teeth of the inner teeth 61 by one or two more than the number of teeth of the outer teeth 59, the spur gear 60 is positioned outside the inner teeth 61 fixed to the dial 32. The spur gear 60 revolves through the engagement protrusion 71 of the hub 34 while meshing with the teeth 59, and this revolution causes the spur gear 60 to be the same as the rotation direction of the hub 34 (valve shaft 22, cap 31) according to the ratio of the number of teeth. Rotate in the direction.

  When the internal teeth 61 (spur gear 60) revolves while meshing with the fixed external teeth 59, the engaging convex portion 60b of the spur gear 60 shown in FIG. 10 (a) becomes the pointer plate 33 in FIG. 10 (b). By engaging with the engaging recess 33c, the rotation of the spur gear 60 is transmitted to the pointer plate 33, and the cap 31 and the pointer plate 33 rotate in the same direction. At this time, assuming that the number of teeth of the inner teeth 61 is A and the number of teeth of the outer teeth 59 is B, the rotation angle θ of rotation of the pointer plate 33 when the hub 34 makes one rotation is the rotation angle θ = 360 ° × {(AB) / A}.

  The rotation of the pointer plate 33 is indicated by an instruction of the pointer portion 33 b to the scale 62 of the scale plate 32, and the rotation transmitted from the cap 31 to the valve shaft 22 is defined as a valve opening that is decelerated via the planetary gear mechanism 35. It can be confirmed from the outside.

  When the valve shaft 22 is rotated from the fully open state to the fully closed state of the valve body 20, for example, the position of the cap 31 is raised by about 3 mm. At this time, the cover 42 is pressed downward via the locking portion 31a, and the hub 34 is pressed by the elastic force of the cover 42 to maintain the state in which the scale plate 32 is mounted on the valve body 20 side. As a result, the opening meter main body 30 is not lifted from the shaft mounting portion 21 and the vertical gap between the hub 34, the pointer plate 33, and the dial 32 is reduced.

Next, the operation of the valve opening meter of the present invention in the above embodiment will be described.
As shown in FIG. 1, the opening meter main body 30 of the present invention is provided around a valve shaft 22 of a shaft mounting portion 21 of the valve main body 20, and a valve shaft rotating cap 31 provided non-rotatingly on the valve shaft 22. By displaying the degree of opening and closing by turning, the valve body 20 is composed of a gate valve body, and this gate body 20 is buried in underground piping or a manhole bottom position (not shown). The opening can be confirmed from the outside.

  The opening meter body 30 includes a scale plate 32, a pointer plate 33, a hub 34, and a reduction gear mechanism 35 provided therein, and a plurality of guides 50 of the scale plate 32 are connected to the rib ribs of the shaft portion 21. 51, and the engagement protrusion 71 provided on the inner peripheral surface of the opening 70 of the hub 34 is engaged with the notch 39 of the cap 31, thereby causing the engagement portion to protrude from the cap 31. The opening degree meter main body 30 can be mounted on the valve main body 20 in a positioning state.

In this case, since the engaging protrusions 71 are engaged so as to be inserted into the notch grooves 39, they are overlapped in the axial direction. On the other hand, by attaching the shaft mounting portion 21 while being inserted into the opening 55 of the dial 32, these are also overlapped in the axial direction.
As described above, by integrating the hub 34 and the cap 31, and the shaft mounting portion 21 and the scale plate 32 so as to overlap each other, the valve body 20 is attached to the valve body 20 by the overlapping amount. The overall height can be lowered. Specifically, while reducing the distance from the bottom surface of the cap 31 to the top surface of the valve body 20, the rotation of the valve shaft 22 is decelerated by the reduction gear mechanism 35, and the valve is opened via the pointer portion 33 b and the scale 62. The degree can be displayed externally.

  Engagement protrusions 71 are provided at rotationally symmetric positions on the inner peripheral surface of the opening 34 at intervals of 180 °, and the respective side surfaces of the notch grooves 39 formed on the cap 31 at intervals of 180 ° are engaged with the engagement protrusions 71. Thus, while preventing the hub 34 from coming off in the left-right direction with respect to the cap 31, the rotational force can be evenly transmitted from the cap 31 to the hub 34, and the hub 34 can rotate smoothly without applying a biased force. .

  On the other hand, as shown in FIG. 6, a pair of guides 50 are provided radially at four locations, and the guide ribs 51 sandwich the projecting ribs 51 provided at four locations in the radial direction on the outer periphery of the shaft mounting portion 21. Thus, it can be mounted on the shaft mounting portion 21 while aligning the opening meter body 30.

As described above, the valve body 20 is positioned by the guide 50 and the protruding rib 51 on the lower side of the opening meter body 30, so that the valve shaft 22 is placed in the opening portions 70 and 55 of the hub 34 and the scale plate 32. Since it is not necessary to fit, these opening parts 70 and 55 can be made into the large size which has allowances rather than a valve-shaft outer diameter.
Therefore, the opening meter body 30 can be shared by the valve shafts 22 having different outer diameters, that is, the valve bodies 20 having different nominal diameters.

  In addition to the engagement between the guide 50 and the protrusion rib 51, the height H of the guide 50 in FIG. 1 is formed to be larger than the clearance L and moves until the engagement protrusion 71 contacts the upper end of the notch groove 39. In this case, the engagement state between the guide 50 and the protruding rib 51 is ensured. Therefore, even if the opening degree meter main body 30 is lifted with respect to the valve main body 20 until the engagement protrusion 71 comes into contact with the upper end of the notch groove 39, the engagement state between the guide 50 and the rib rib 51 is maintained. Thus, the opening meter main body 30 is prevented from coming off from the valve main body 20 and idling. Therefore, there is no need to provide a thrust washer or wave washer between the opening meter main body 30 and the cap 31 or a fixing presser ring having a set screw, and the opening meter can be attached to and detached from the valve main body 20. It becomes easy.

  As shown in FIGS. 2 and 3, the scale plate 32 and the pointer plate 33 are fitted from the lower side of the pointer plate 33 and the hub 34 through the annular projections 52 and 64, respectively, and the scale plate 32 and the pointer plate The upper surfaces 32a and 33a having a gentle inclination of the plate 33 are provided with gradients 54 and 65 that are inclined toward the outer diameter, respectively. Due to the gradients 54 and 65, the mud falling from the top slides down to the outside of the opening meter, but the dial 32, the pointer plate 33, the pointer plate 33, and the hub 34 in such a state that the opening meter is submerged in the mud. Even if mud is caught in the upper surface portions 32a and 33a between the upper and lower surfaces, it is possible to prevent the ring-shaped convex portions 52 and 64 from climbing into the inner side, and the upper surface portions 32a and 33a are inclined gently toward the outside. The pointer plate 33 that contacts the upper surface portion 32a and the hub 34 that contacts the upper surface portion 33a rotate at different speeds, so that the outer peripheral bottom surface 33d and the upper surface portion 32a, and the outer peripheral bottom surface 34c and the upper surface portion 33a The mud between them is slid by gravity and slides down to the outside of the opening meter. For this reason, it is possible to prevent the malfunction by preventing the mud from entering the mud.

  Moreover, since the hub 34 has a larger diameter than the upper surface portion 33a of the pointer plate 33 and the pointer plate 33 has a larger diameter than the upper surface portion 32a of the scale plate 32, the respective gaps are hidden from the upper side. It becomes difficult for mud or the like flowing from above to enter through the gap.

  Furthermore, since the hub 34 and the scale plate 32 are snap fit fitted and integrated by the engaging portions 72 and 56, the opening meter main body 30 is prevented from being inadvertently separated and operates stably. At the same time, the scale plate 32 and the pointer plate 33, and the pointer plate 33 and the hub 34 can be integrated so as to be in close contact with each other, thereby closing these gaps (joints) and preventing intrusion of mud or the like.

  In FIG. 7, the display area of the pointer plate 33 can be changed by appropriately changing the position, shape, and interval of the scale 62 of the scale board 32, so that the opening meter body 30 can be easily adapted to the nominal diameter of the valve body 20. Thus, it is possible to cope with the valve body 20 in which the number of rotations of the cap 31 and the valve shaft 22 from the valve opening to the valve closing for each nominal diameter is defined by a standard (for example, JWWA B 120).

In FIG. 11, 2nd Embodiment of the opening degree meter for valves of this invention is shown. In the following embodiments, the same parts as those in the previous embodiments are denoted by the same reference numerals, and the description thereof is omitted.
In the opening meter main body 80 in this embodiment, the engagement protrusion 71 of the hub 34 shown in FIG. 12 is provided at one place on the inner peripheral surface of the opening 70 where the power can be transmitted. Four engaging portions 50, which are a pair of guides, are provided in the radial direction on the lower surface of the dial 32, and four radial portions are provided on the outer periphery of the engaging portion 50 and the shaft mounting portion 21 of the valve body 20. By engaging the engaging portion 51 which is a protruding rib, the opening degree meter main body 80 is centered on the valve main body 20 in a positioned state and is mounted. As described above, if the opening meter can be centered, the engagement protrusion may be provided at one place, and it is not necessary to be provided at a plurality of places as described above. Further, the opening meter may be centered while being positioned by the O-ring 75, and either one or both of the engagement of the guide 50 with the protruding rib 51 and the seal of the O-ring 75 are provided. Can be mounted in a centered state.

  Further, in the opening meter body 80, the height of the cap 81 is formed low, and the distance from the bottom surface of the cap 81 to the opening meter body 80 is made smaller than that in the first embodiment. Specifically, the distance from the bottom surface of the cap 81 to the valve body 20 was reduced to almost 0 mm when the valve was fully opened. Thereby, the overall height after the opening degree meter main body 80 is attached to the valve main body 20 can be further reduced.

In FIG. 13, 3rd Embodiment of the opening degree meter for valves of this invention is shown.
In the opening meter main body 90, a regular octagonal polygonal concave portion 92 is formed on the lower surface of the scale plate 91, and a regular octagonal polygonal convex portion 93 that can be fitted into the polygonal concave portion 92 on the shaft mounting portion 21 of the valve body 20. The opening degree meter main body 90 is provided so as to be attachable to the valve main body 20 while the valve shaft 22 and the scale plate 91 are aligned with each other. Polygonal concave portion 92 and polygonal convex portion 93 may have a polygonal shape other than a regular octagon as long as they can be fitted to each other. The structure in which the polygonal concave portion 92 and the polygonal convex portion 93 are fitted and integrated as described above is particularly suitable for mounting an opening meter on a small-diameter valve. These can be attached without providing the main body 90 with protruding ribs.

In FIG. 14, 4th Embodiment of the opening degree meter for valves of this invention is shown.
In the opening degree meter main body 100 in this embodiment, the valve shaft 22 is provided through a cap 31 so that it can be manually operated, and the degree of opening and closing is provided by the opening degree meter main body 100. The prism portion 40 of the cap 31 is provided in a shape that can be engaged non-rotatably with an engagement surface 102 formed on the rotation jig 101. The rotating jig 101 is provided with a manual operation handle 103, and the rotation of the handle 103 enables the valve shaft 22 to be rotated via the prism portion 40. The turning jig 101 of the handle 103 is placed from above while fitting the prism portion 40 to the engaging surface 102, and is provided so that the cap 31 can be rotated without being fixed to the cap 31.

  By attaching the separate handle 103 to the cap 31 in this way, the valve shaft 22 can be directly operated by this handle 103. At the time of the operation, the cap 31 is connected to the cap 31 via the reduction gear mechanism 35 as in the above embodiment. Thus, the rotation of the valve shaft 22 is decelerated, and the valve opening can be confirmed from the outside by reading the indication on the scale 62 of the pointer portion 33b shown in FIG.

In FIG. 15, 5th Embodiment of the opening degree meter for valves of this invention is shown.
In the opening meter main body 110 of this embodiment, a manual operation handle 112 for rotating the cap 111 is provided so as to be integrated with the cap 111 so as to be attached to the valve shaft 22, and the valve shaft 22 is manually operated by the handle 112. It is provided so that it can be operated. In this case, the number of parts can be reduced by integrating the cap 111 and the handle 112.

FIG. 16 shows a sixth embodiment of the valve opening degree meter of the present invention.
In the opening meter main body 120 in this embodiment, the upper part of the prism 40 of the cap 31 of FIG. 14 is cut and the upper end surface 40 a is provided lower than the height of the rotating jig 101, and the screw is inserted through the mounting plate 121. The handle 103 is integrally fixed to the rotating jig 101 by 122. In this case, unnecessary removal and dropping of the handle 103 from the cap 31 can be prevented while the cap 31 and the handle 103 are detachably provided. In this way, the handle can be provided separately or integrally with the cap.

FIG. 17 shows a state in which the opening meter body is mounted on a valve body having a different diameter. In the seventh embodiment of the valve opening meter of the present invention shown in FIG. The valve body 130 is attached to the valve body 130, and the valve body 130 is provided with a valve shaft 131 having a smaller diameter than the valve shaft 22 of FIG.
On the other hand, in the eighth embodiment of the valve opening degree meter of the present invention shown in FIG. 17B, a state in which the opening degree meter main body 30 is mounted on the valve main body 140 having a channel diameter of φ500 mm is shown. The valve body 140 is provided with a valve shaft 141 having a diameter larger than that of the valve shaft 22 of FIG.
In any case, the engagement protrusion 71 can be engaged with the notch groove 39 and operated while preventing the contact of the engagement protrusion 71 of the opening meter body 30 and the valve shafts 131 and 141 to the inner peripheral side. it can. As described above, the opening degree meter main body of the present invention can be mounted on the valve main body of various flow path diameters, and the opening degree can be displayed outside.

FIG. 18 shows an embodiment of a gate valve with an opening meter.
The valve body 150 shown in the figure has a body 151 and a lid member 152, which are fixed by bolts (not shown). A valve body 153 is built in the valve body 150, and the valve shaft 22 is attached to the gate valve body 153 via a female screw top 154. A female screw 154a is formed on the inner periphery of the female screw top 154, and a male screw 22a formed on the valve shaft 22 is screwed to the female screw 154a. The valve body 150 is so-called that the gate valve 153 moves up and down in a crossing direction with respect to the flow path 155 by opening and closing the flow path 155 by the female screw 154a and the external thread 22a when the valve shaft 22 is rotated. It consists of an internal screw type gate valve.

The shaft mounting portion 156 of the valve main body 150 is a packing box for a gate valve, and a storage component 157 such as packing is stored in the packing box 156. By attaching the above-described opening meter body 30 to the gate valve main body 150, the valve opening degree when the gate valve body 153 moves up and down can be visually recognized from the outside. In this case, since the opening meter body 30 is provided around the valve shaft 22 of the packing box 156, the packing box 156 is covered with the opening meter body 30, and the valve body 150 is attached to a pipe or the like embedded in the ground. In the case of connecting, the gate valve 153 can be operated while preventing the intrusion of mud or the like into the interior and rotating the cap 31 to confirm the display of the opening meter.
The valve body is not limited to the gate valve and can be applied to various valves in which it is difficult to confirm the valve opening degree from the rotation of the valve shaft.

20 Valve body 21 Shaft mounting part 22 Valve shaft 30 Opening meter body 31 Cap 32 Scale plate 32a Upper surface part 33 Pointer plate 33a Upper surface part 33b Pointer part 34 Hub 34a Eccentric part 35 Reduction gear mechanism 39 Notch groove (notch part)
40 prismatic part 41 rotating jig 41a engaging surface 50 guide (engaging part)
51 Protruding rib (locking part)
52, 64 Annular convex part 54, 65 Gradient 59 External tooth 60 Spur gear 61 Internal tooth 62 Scale 71 Engaging protrusion 103 Handle 150 Valve body 153 Gate valve body 156 Packing box

Claims (4)

An opening meter body is provided around the valve shaft of the valve body, and the opening meter body is a valve opening meter comprising a scale plate, a pointer plate, a hub, and a reduction gear mechanism provided therein, A valve shaft turning cap is attached to the upper end of the shaft in a non-rotating state, and the lower part of the cap is inserted into the opening of the hub and protrudes toward the center of the inner periphery of the opening of the hub Engaging a notch groove formed on the side surface of the cap with the engaging protrusion, and engaging portions that are a plurality of guides provided radially on the lower surface of the dial plate are shaft mounting portions that are mounted on the valve shaft. An inner periphery of an opening for inserting a valve shaft to be inserted into the hub and an opening for inserting a valve shaft to be inserted into the dial plate following the opening. The diameter of the shaft mounting part is larger than the outer diameter of the upper part of the shaft mounting part inserted into the opening of the scale plate. , Open meter valve, wherein it has the aperture diameter that can enter instrumentation various valve shaft of the different valve shaft diameters. The valve opening degree meter according to claim 1, wherein a seal ring is mounted between an outer periphery of the shaft mounting portion and an inner periphery of the opening of the scale plate . The valve opening meter according to claim 1, wherein the hub is formed with a diameter larger than that of the upper surface portion of the pointer plate, and the pointer plate is formed with a diameter larger than that of the upper surface portion of the dial . The valve opening degree meter according to any one of claims 1 to 3, wherein a gate valve is built in the valve body, and the shaft mounting portion is a packing box of the gate valve .

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