JPH0414688Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is directed to opening and closing of a parent-child butterfly valve in which both valve bodies of a parent-child butterfly valve in which a child valve element is provided on a parent valve element can be remotely controlled separately. Regarding equipment.

[Conventional technology]

Conventional butterfly valves are installed in a box buried underground or in a valve chamber formed underground, and the valve body is opened and closed by descending into the valve chamber through a manhole or the like that opens to the outside.

[Problem that the invention attempts to solve]

For this reason, when opening and closing the valve body, the operator must descend into the valve chamber each time, which is a cumbersome task.Especially in the case of parent-child butterfly valves in which a child valve body is provided on the master valve body, both valves Since the body can be rotated separately, there was a problem that it was difficult to work if the valve chamber was narrow.

Therefore, in the present invention, the parent-child butterfly valve can be remotely controlled so that it can be opened and closed without going down into the valve chamber, and the opening degree of the parent valve body can be displayed using the slave valve gearbox. The purpose is to provide equipment.

[Means for solving problems]

In order to solve the above problems, in this invention,
A child valve body is arranged on a butterfly-type master valve body, a master valve stem and a child valve stem are provided on each valve body, and a master valve drive shaft and a child valve drive shaft are connected to both valve stems through reduction gears, respectively. In the parent-child butterfly valve, one end of a parent valve connection shaft and a child valve connection shaft are connected to the parent valve drive shaft and the child valve drive shaft, respectively, and a parent valve gear box and a child valve gear box are connected to the other ends of the two connection shafts. An opening/closing device having a slave valve gearbox rotatably disposed on a master valve gearbox via a bearing is provided, and the other ends of the two connecting shafts are connected to the gear mechanism of the master valve gearbox and the gear mechanism of the slave valve gearbox, respectively. A stopper member is attached to the slave valve gearbox to enable the master valve body and the slave valve body to be individually remotely operated by meshing with each other, and to fix rotation of a handle shaft for operating the gear mechanism of the slave valve gearbox. When the handle shaft is fixed by the stopper member and the master valve is opened, the slave valve gearbox is rotated on the master valve gearbox about the slave valve connecting shaft, and the rotation of the slave valve gearbox is controlled by the master valve. The feature is that it is used to display the opening degree of the valve body.

[Effect]

By configuring as described above, the parent valve element and the child valve element of the parent-child butterfly valve can be remotely controlled separately, and on the other hand, when the rotation of the child valve connecting shaft is fixed by the stopper member, the child valve gear box The opening degree of the parent valve body is displayed.

〔Example〕

An embodiment in which the present invention is applied to a floor of a two-bed structure will be described below with reference to FIGS. 1 to 4.

A parent-child butterfly valve 1, which has a master valve body 1a and a child valve body 1b, is installed on a floor 2 of a basement or the like, and has a master valve stem (not shown) and a child valve stem that open and close both the valve bodies 1a and 1b. (not shown) are connected via a speed reducer 3 to a master valve drive shaft 4 and a child valve drive shaft 5 that separately rotate both valve rods.

An opening/closing device 7 for opening and closing the parent-child butterfly valve 1 is provided on the work floor 6 above the floor 2, and the opening/closing device 7 and the drive shafts 4, 5 are connected to each other from the drive shafts 4, 5. The valves extend upward and are connected by joints 8a and 9a, and are connected by a parent valve connecting shaft 8 and a child valve connecting shaft 9, which are parallel to each other.

This opening/closing device 7 is an opening 6 opened in the work floor 6.
a main valve gearbox 11 attached to a base 10 installed on the main valve gearbox 11;
The slave valve gearbox 13 is rotatably provided on an annular convex portion 11b formed around the valve via a bearing 12 such as a bearing.

The master valve gear box 11 is provided with a master valve handle wheel 11d on its side surface via a handle shaft 11c, and a bevel gear 11 is provided at the tip of the handle shaft 11c which is rotated by the master valve handle wheel 11d.
e is attached, and this bevel gear 11e is meshed with a bevel gear 8b attached to the upper end of the master valve connecting shaft 8 protruding into the master valve gear box 11 via the bush 11f to form a gear mechanism. The main valve body 1a is rotated by rotating the handle wheel 11d.
Open and close.

The slave valve gearbox 13 is provided with a slave valve handle wheel 13b at the upper end of a handle shaft 13a whose lower end is pivoted to the bottom and extends upward of the slave valve gearbox 13, and a spur gear 13c is attached to the handle shaft 13a. It will be done. This spur gear 13c is connected to the bush 1 from just below the opening 11a of the master valve gearbox 11.
1g, passes through the slave valve gearbox 13 through bushes 13d and 13e, and meshes with a spur gear 9b attached to the slave valve connecting shaft 9 protruding above the slave valve gearbox 13 to form a gear mechanism. A handle shaft 13a for operating this gear mechanism is rotated by a child valve handle wheel 13b to open and close the child valve body 1b.

Further, a support bracket 13f is erected on the side of the handle shaft 13a above the child valve gearbox 13, and a stopper member 14 for fixing the rotation of the handle shaft 13a is provided on the support bracket 13f.

This stopper member 14 has a male threaded portion 14 inserted into the insertion hole 13g of the support bracket 13f.
A ring-shaped stopper part 14b is formed at the tip of the handle shaft 13a, and as shown in FIG. 3, the inner diameter of the stopper part 14b is larger than the outer diameter of the handle shaft 13a, and 13f and the rotation of the wing nut 14c screwed onto the male threaded portion 14a, the male threaded portion 1
4a into the insertion hole 13g of the support bracket 13f.
The inner side of the stopper part 14b can be freely engaged and detached from the handle shaft 13a by protruding and retracting from the handle shaft 13a, and as shown in FIG.
The rotation of the handle shaft 13a is fixed by pressing against the handle shaft 13a.

Further, an annular recess 13h is formed at the lower part of the child valve gearbox 13 to form a labyrinth by engaging with the annular protrusion 11b formed at the upper part of the main valve gearbox 11. prevent water, dust, etc. from entering.

A pointer 15 is provided on the upper part of the child valve connecting shaft 9.
A child valve body 1b is placed on this lower child valve gear box 13.
A slave valve scale plate 16 indicating the opening degree of the slave valve gear box 13 is also provided at the lower part of the wall surface on the master valve connecting shaft 8 side.
A master valve scale plate 18 indicating the opening degree of the master valve body 1a is provided on the lower master valve gear box 11.

Since this embodiment is configured as described above, when opening and closing the main valve body 1a, the stopper member 14
The rotation of the handle shaft 13a is fixed by this. When the main valve handle wheel 11d is turned, this rotation is caused by the following: handle shaft 11c→bevel gear 11e→bevel gear 8b→main valve connection shaft 8→main valve drive shaft 4→reducer 3
→The signal is transmitted in the order of the master valve rod, and the master valve body 1a is opened and closed. At this time, the rotation of the child valve body 1b accompanying the opening operation of the master valve body 1a is transmitted to the child valve connecting shaft 9, but since the rotation of the handle shaft 13a is fixed by the stopper member 14, The child valve gearbox 13 rotates about the child valve connection shaft 9 by meshing the spur gear 9b attached to the child valve connection shaft 9 with the spur gear 13c attached to the handle shaft 13a. Then, the opening degree of the master valve body 1a is displayed by a pointer 17 provided at the lower part of the child valve gearbox 13, and the opening degree of the master valve body 1a is read by the master valve scale plate 18 provided on the master valve gearbox 11.

On the other hand, to open and close the child valve body 1b, when the handle shaft 13a is released from the fixation of the handle shaft 13a by the stopper member 14 and the handle wheel 13b is rotated, this rotation causes the handle shaft 13a→spur gear 13c→spur gear 9b→slave valve connection. The information is transmitted in the order of shaft 9 → child valve drive shaft 5 → reducer 3 → child valve rod, and child valve body 1b is opened and closed. , and the slave valve scale plate 16 provided on the upper part of the slave valve gearbox 13.

When opening and closing the child valve body 1b, the child valve body 1b
If the opening/closing torque of As a means, it is also possible to prevent rotation of the child valve gearbox 13 to the main valve gearbox 11 by a mechanical means such as a locking pin, but the child valve drive shaft 5 can prevent the rotation of the child valve gearbox 13 from the main valve gearbox 11 by a mechanical means such as a locking pin. Since the child valve body 1b is opened and closed through the child valve body 1b, even if an opening/closing torque is applied to the child valve body 1b, the handle wheel 13b can be rotated with a small force. Even if the handle wheel 13b is rotated while holding the handle wheel 13b by hand so as not to rotate, the child valve body 1b can be sufficiently opened and closed.

[Effect of idea]

As explained above, the parent-child butterfly valve opening/closing device of the present invention connects one end of the parent-valve connecting shaft and the child-valve connecting shaft to the reducer of the parent-child butterfly valve, and connects the parent valve to the other end of the two connecting shafts. By providing a gearbox and a slave valve gearbox which is rotatably installed on the master valve gearbox via a bearing, the parent and slave butterfly valves can be remotely controlled and can be operated in a wide area, making opening and closing operations easier. and maintenance work can be easily performed. In addition, since remote control is possible, for example, the parent-child butterfly valve can be installed in a basement and operated above ground, allowing it to be used as a two-bed structure, and can also be used with existing parent-child butterfly valves.

Furthermore, a stopper member is attached to the child valve gearbox of the opening/closing device to fix the rotation of the handle shaft that operates the gear mechanism, and the child valve gearbox can display the opening degree of the parent valve when the handle shaft is fixed in rotation. Therefore, the opening degree of the parent valve body can be displayed with a simple structure.

In addition, if an annular recess is provided at the bottom of the slave valve gearbox to form a labyrinth by engaging with an annular convex part formed on the upper surface of the master valve gearbox, it is possible to prevent water, dust, etc. from entering the master valve gearbox. It can be prevented.

[Brief explanation of drawings]

1 to 4 show an embodiment of the present invention, in which FIG. 1 is a front view showing the parent-child butterfly valve and the opening/closing device, FIG. 2 is a sectional side view showing the opening/closing device,
Figure 3 is a partial cross-sectional plan view showing the stopper member attached to the slave valve gearbox, 1 is a case where the rotation of the handle shaft that operates the gear mechanism is not fixed, 2 is a case where the rotation is fixed; FIG. 2 is a partially sectional plan view showing the opening/closing device. 1... Parent and child butterfly valve, 1a... Parent valve body, 1
b...Sub valve body, 3...Reducer, 7...Switching device,
8... Master valve connection shaft, 8b... Bevel gear, 9...
Child valve connecting shaft, 9b... Spur gear, 11... Main valve gear box, 11b... Convex portion, 11c... Handle shaft, 11d... Main valve handle wheel, 11e... Bevel gear, 12... Bearing, 13... ... Child valve gearbox, 13a... Handle shaft, 13b... Child valve handle wheel, 13c... Spur gear, 13h... Recess, 1
4...Stopper member, 14a...Male thread portion, 14
b... Stopper part, 14c... Butterfly nut, 15...
... Pointer, 16 ... Child valve scale plate, 17 ... Pointer, 1
8...Oyaben scale plate.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A butterfly-type master valve body is provided with a child valve body, each valve body is provided with a master valve stem and a child valve stem, and both valve stems are connected to the parent valve body via a reducer, respectively. In a parent-child butterfly valve in which a valve drive shaft and a child valve drive shaft are connected, one end of a parent valve connection shaft and a child valve connection shaft are connected to the parent valve drive shaft and the child valve drive shaft, respectively, and the other ends of the two connection shafts are connected. An opening/closing device having a master valve gearbox and a slave valve gearbox rotatably disposed on the master valve gearbox via a bearing is provided on the end side, and the other ends of the two connecting shafts are respectively connected to the gears of the master valve gearbox. a stopper member that meshes with the gear mechanism of the slave valve gearbox to enable separate remote control of the master valve body and the slave valve body, while fixing the rotation of a handle shaft that operates the gear mechanism of the slave valve gearbox; is attached to the slave valve gearbox, the handle shaft is fixed by the stopper member, and when the master valve body is opened, the slave valve gearbox is rotated on the master valve gearbox about the slave valve connecting shaft; An opening/closing device for a parent and child butterfly valve, characterized in that rotation of the child valve gearbox is used to indicate the opening of the parent valve. 2. A request for registration of a utility model characterized in that the master valve gearbox has an annular convex portion formed at its upper portion, and the slave valve gearbox has an annular concave portion formed at its lower portion that engages with the convex portion to form a labyrinth. The opening/closing device for the parent-child butterfly valve according to item 1.