JPS5921340Y2 - gate valve - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a gate valve used for water supply, etc.

Conventionally, this type of gate valve is often installed underground, and it is often desired that it can be operated from directly above, no matter what position the water pipe or other pipe to which the gate valve is attached is placed. .

However, it is extremely difficult to satisfy this requirement when the valve stem is placed horizontally so that its axis is horizontal.

Additionally, when the valve is installed on the ground and the axis of the valve stem is vertical, it is required to be able to operate from the side, but conventional gate valves cannot easily meet this requirement. I couldn't let it go.

Furthermore, in order to install conventional gate valves underground, it was necessary to create a special valve chamber underground to protect the operating parts.

The purpose of this invention is to solve these conventional problems, and its characteristics are that a bevel gear is fixed to the outer end of the valve stem connected to the valve body, and the bevel gear meshes with the bevel gear. Another bevel gear is disposed such that the axis of an operating shaft fixed to one end and the axis of the valve stem are substantially perpendicular to each other, and the valve stem is attached to a valve box portion containing the valve body and the valve stem. A gear box containing the above-mentioned umbrella gear is installed so as to be rotatable and fixed around the axis of the gear box, and further,
The other end of the operating shaft is made to protrude outward from the gear box, and the operating shaft is attached to the gear box, and by fixing the rotation of the gear box, the operating shaft is rotated around the axis of the valve stem. It is located at a point configured to protrude at any radial position.

Hereinafter, the present invention will be explained in detail based on the illustrated embodiments.

In FIG. 1, reference numeral 1 denotes a gate valve, which is used for water supply as an example, and is attached to a branch pipe 3 from a main pipe 2 buried horizontally.

As shown in Figures 2, 3 and 4, the valve box section 4 consists of a valve box main body 4a, a tubular lid 4b, and a gasket housing tip lid 4.
The valve box main body 4a has upper and lower flange parts 5 and 6, and is fixedly connected to the branch pipe 3 and the main pipe 2 by bolts and nuts, respectively. , a valve body 7 that opens and closes by moving in the left-right direction in the figure is housed.

8 is a valve seat fixed in the valve body body 4a, 9 is a valve seat fixed to the valve body 7, and both valve seats 8 and 9 are in close contact with each other as shown in FIG. 3 to obtain a closed state. If both valve seats 8 and 9 are separated while sliding against each other, they gradually open and can be brought into the open state as shown in FIG. 2.

10 is a valve stem, which has an outer flange 11 in the middle, and a slide ring 1 at the joint between the tubular lid 4b and the tip lid 4C.
2... is held rotatably and prevented from moving in the axial direction.

Further, a male threaded portion 1 is located inside the outer flange portion 11 of the valve stem 10.
3 and is screwed together with the female screw top 14 of the valve body 7, and the valve stem 10
By rotating , any open/closed state between the fully closed state shown in FIG. 3 and the fully open state shown in FIG. 2 can be obtained.

The outer end of the valve stem 10 connected to the valve body 7 by the screw connection as described above is inserted into the bearing 17 that holds sealing members such as the X-ring 15 and the O-ring 16, and the bevel gear 1
8 is fixed, and the male threaded portion 19 of the bearing 17 is screwed into the female threaded portion 20 of the tip end cap 4C.

21 is a gear box, and the axis A of the valve stem 10 is
It is attached to the tip of the tip end cover 4C of the valve box portion 4 so as to be freely rotatable.

Specifically, the outer flange 17a of the bearing 17 and the tip lid 4C
The inner flange 22 of the gear box 21 is rotatably held between the outer end surface of the gear box 21 and the outer end surface of the gear box 21.

Further, 23 is a fixing bolt, which is screwed into a screw hole provided radially through the outer fitting cylinder part 17b on the inner end side of the bearing 17, and is pressed against the tip end cap 4C of the bolt 23. This is to fix the rotation of the gear box 21.

24 is an operating shaft for sliding the valve body 7 to open and close, and a bevel gear 25 meshing with the bevel gear 18 is
It is fixed to one end of the operating shaft 24, and the axis B of the operating shaft 24 is fixed to one end of the operating shaft 24.
However, the operating shaft 24 is rotatably pivoted to a part of the peripheral wall of the gear box 21 and protrudes outward from the peripheral wall so as to be substantially orthogonal to the axis A of the valve stem 10.

That is, a boss part 27 having a through hole 26 is attached to a part of the peripheral wall of the gear box 21, and an outer flange part 28 protruding from the middle part of the operating shaft 24 is connected to the outer flange part 28 by a slide ring 29 and a plug 30.
It is held in a clamped manner so that it can rotate freely but not move in the direction of axis B.

The operating shaft 24 is inserted into the hole 32 of the plug 30 via a sealing member 31 such as an O-ring, and the plug 30
The male threaded portion 33 is coated with a sealant and inserted into the threaded hole 34 of the boss portion 27.

Further, 35 is a cap having a square hole 35a that is fitted onto the corner 24a of the operating shaft 24.

The cap 35 has a corner 35b at its tip, and as shown in FIG. , can be freely connected to rotate the operating shaft 24.

Further, as shown in FIG. 4, the gear box 21 has a lid 37, which can be opened freely on the left side of the figure, and has a male threaded portion 1 of the bearing 17.
Insert the screw advancement/retraction jig No. 9, and then insert the gear No. 18.25.
38.38 screw advance/retreat tool can be inserted.

The lid body 37 is removably and hermetically closed with bolts 40 through a sealing member 39 such as a gasket.

Further, 41 is a sealing member such as an O-ring that is interposed in the sliding contact portion between the bearing 17 and the inner flange 22. As described above, the gear box 21 containing the bevel gears 18 and 25 has a sealing member. The member 41.16.31.39 is formed into a sealed shape, and there is no external leakage of grease from the meshing part of the gear 18.25 or water intrusion, and it operates smoothly for a long period of time, making it especially suitable for underground installations such as water supply etc. This has the advantage that it is not necessary to attach a sealing valve chamber to the gate valve.

Therefore, the gear box 21 containing the umbrella gear 18.25 is connected to the tip end lid 4C of the valve box portion 4 containing the valve body 7 and the valve box 10.
The gear box 21 has an operating shaft 24 projecting outwardly from the gear box 21, and an axial center B of the operating shaft 24 is substantially perpendicular to the axial center A of the valve stem 10. The gear box 21 is rotated and fixed to the tip cover 4C by screwing the bolts 23 forward and backward, so that the operating shaft 24 can be projected to any radial position around the axis A of the valve stem 10. Therefore, in FIG. 1, FIG. 3, and FIG. 5 showing the E-E arrow view in FIG. 1, the main pipe 2 is arranged horizontally, and the branch pipes 3 and Even if the protruding circumferential position of the valve box portion 4 with respect to the main pipe 2 changes upward, obliquely upward, or laterally, the gear box 21 can be rotated around the axis A and the operating shaft 2
4 can be adjusted so that it always stands vertically directly above.

Specifically, after loosening the fixing bolt 23 and rotating the operating shaft 24 integrally with the gear box 21 around the axis A by a predetermined angle, the fixing bolt 23 is tightened so that the operating shaft 24 is vertically rotated. Just fix it so that it is.

In this way, the valve can be easily operated using the opening/closing operating tool 36 inserted from above.

Furthermore, if the main pipe 2 is arranged horizontally along the inside of a vertical concrete wall, the manhole in the concrete wall will open in the horizontal direction, although not shown.

When the gate valve 1 is installed corresponding to such a manhole, the operating shaft 24 must be operated horizontally and laterally.

In such a case, no matter where the protruding circumferential positions of the branch pipe 3 and the valve box part 4 are with respect to the main pipe 2, the gear box 21 and the operating shaft 24 in FIGS. It is possible to rotate the operating shaft 24 about the axis A to bring the operating shaft 24 horizontally and fix it, and to operate the manhole from the horizontal direction using the opening/closing operating tool 36.

In the above figures, the case where the valve stem 10 is horizontally placed is illustrated, but when the valve stem 10 is installed vertically, so-called, the operating shaft 24 is rotated within the horizontal plane. It can be fixed in any direction directly to the side, and can be opened and closed from any direction.

The present invention is constructed as described above, and regardless of the mounting orientation of the gate valve, the operating shaft 24 can be swung and fixed in the direction that is most convenient for operation. It is convenient for use.

Furthermore, even though it is a horizontal type, it can always be operated vertically directly above, or even though it is a horizontal type, it can be operated from any horizontal direction, making opening and closing operations easier and gate valve installation work easier.

[Brief explanation of drawings]

Fig. 1 is a front view showing an embodiment of the present invention, Fig. 2 is a partially sectional plan view, Fig. 3 is a partially sectional front view, Fig. 4 is a partially sectional enlarged front view of main parts, and Fig. 5 is a partially sectional plan view. The figures are simplified side views illustrating various mounting positions. A...Axis center, B...Axis center, 4...Valve box part, 7...
・Valve body, 10... Valve stem, 18.25... Bevel gear, 2
4...Operation axis.

Claims (1)

[Claims for Utility Model Registration] 1. A bevel gear 18 is attached to the outer end of the valve stem 10 connected to the valve body 7.
and another bevel gear 25 that meshes with the bevel gear 18 is fixed to one end of the operating shaft 24. The axis B of the operating shaft 24 and the axis A of the valve stem 10 are disposed substantially perpendicular to each other. The valve body 4 containing the body 7 and the valve stem 10 has an axis A of the valve stem 10.
A gear box 21 containing the above-mentioned umbrella gear 18.25 is attached so as to be rotatable and fixed therearound, and the gear box 21
The other end of the operating shaft 24 is made to protrude outwardly, and the operating shaft 24 is attached to the gear box 21, and by fixing the gear box 21 to rotate, the operating shaft 24 is attached to the shaft of the valve stem 10. Heart A
A gate valve characterized in that it is configured to protrude at any radial position around the valve. 2. The gate valve according to claim 1, wherein the gear box 21 containing the bevel gears 18, 25 is formed in a sealed shape.