JP3261573B2 - fire hydrant - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire hydrant standing on the ground.

[0002]

2. Description of the Related Art Conventionally, a fire hydrant erected on the ground is generally provided with a valve mechanism at a lower end of a long, cylindrical water guide pipe having a mounting flange at an upper end of a water supply device buried underground. And the operating rod provided in the valve mechanism is pulled out to the upper end position of the water pipe, and is connected to the mounting flange of the water supply device having a water supply pipe connected to the lower end of the valve housing. It is erected on the ground. The fire hydrant, at the upper end of a long cylindrical body with a flange at the lower end of the mounting flange of the water supply device is tightened by a bolt,
An operating member for opening and closing the valve mechanism of the water supply device is rotatably supported on a fire hydrant main body having a head provided with a connection mechanism for connecting a fire hose to a side surface.

[0003]

By the way, the body and the head constituting the above-mentioned conventional fire hydrant main body are exclusively made of cast iron, and since the surface is polished and then painted, the paint is peeled off. As a result, it becomes unsightly, has poor corrosion resistance, and is susceptible to rust. Therefore, there is a trouble that inspection and repair must be performed at regular intervals. In addition, there has been an inconvenience that the material is generally thicker and the weight is increased, which is inconvenient for handling.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned disadvantages of the prior art, the present invention is directed to a case where a main body which is connected to a water supply device buried underground and is erected on the ground has a cylindrical shape made of a stainless steel pipe. A flange is provided at the lower end of the body, and a top formed in a curved shape with an opening at the center is integrally provided at the upper end, and a support mechanism is attached to the opening, and a support mechanism is attached to the support mechanism. An operation member for opening and closing the valve mechanism of the water supply device is rotatably supported, and a water outlet is provided on the upper side surface of the body, a screw ring is attached to the water outlet, and a fire hose is attached to the screw ring. A fire hydrant provided with a connecting mechanism for connecting the supporting mechanism, wherein the supporting mechanism is a stainless steel supporting member whose peripheral edge is welded to the opening at the outer periphery of an upper end of a cylindrical portion formed of a stainless steel pipe having a thread at the inner periphery. Board A welded attachment member, provided on the outer circumference of the screw which is screwed fastened in the screw, it is the pivot operation part to the upper ones, characterized by being configured and a support member having integrally.

In the above, a rib is formed outward at the water discharge port by drawing, and a stainless steel screw ring is welded to the rib, and the welding is performed by an inert gas welding method.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a fire hydrant body according to an embodiment of the present invention; FIG. Are provided integrally.

[0007] As is apparent from FIG.
A seal plate 5 which is made of a stainless steel pipe and whose lower end is larger than the outer diameter of the body 3 is preferably welded by inert gas welding (hereinafter simply referred to as welding), and a stainless steel flange 2 is superposed on this upper surface. ,
The inner periphery thereof is welded to the outer peripheral surface of the body 3, and a stainless steel cover 6 formed in a crown shape is fitted on the flange 2 so as to penetrate the body 3.

The top portion 4 has an opening 7 at the center by bending the upper end of the body 3 by drawing, and has an opening 7 at the center on the upper side surface of the body 3 by drawing. A water outlet 9 having a curved ring-shaped rib 8 is provided.

The opening 7 has an operation member 20 to be described later.
The support mechanism for rotatably supporting is welded. Specifically, the support mechanism includes a mounting member 10 and a support member 11.

That is, as shown in FIG. 4, the mounting member 10 is formed by welding a stainless steel plate 14 to the outer periphery of the upper end of a cylindrical portion 13 made of a stainless steel pipe having a screw 12 on the inner periphery. The periphery of the plate 14 is attached to the opening 7 by welding.

As shown in FIG. 5, the support member 11 has a screw which is screwed to the screw 12 of the mounting member 10 on the outer periphery of a cylindrical portion 15 made of a brass pipe.
A turning operation unit having a large diameter, in the figure, a turning operation unit 16 formed in a hexagonal shape is integrally provided at an upper portion.
6 are provided on the lower surface and the inner peripheral surface of the cylindrical portion 15 with annular concave grooves 18 and 19 in which the O-ring 17 is fitted.

The cylindrical portion 15 of the support member 11 constructed as above is screwed into the cylindrical portion 13 of the mounting member 10, and the O-ring 17 is fitted in the concave groove 18 so that the rotating operation portion 16 is formed. The attachment member 10 and the support member 1 are rotated by a tool.
1 is tightened in a watertight state.

An operation member 20 for opening and closing the valve mechanism of the water supply device includes a mounting shaft 2 having a square handle 21 at the upper end.
2, a pipe-shaped connecting rod 23 is pivotally mounted on the mounting member 22, and the mounting shaft 22 is rotatably supported on the support member 11 via an O-ring 17 in an airtight state.

As shown in FIG. 6, the water outlet 9 has a neck portion 29 which is formed of a stainless steel pipe and has a screw 26 on the inner periphery thereof and which protrudes through one end surface of a short screw ring 27 via a step portion 28. The outer periphery is welded.

A well-known connection mechanism 30 for a fire hydrant which is automatically connected to a connection fitting provided at the end of the fire hose is attached to the water outlet 9 to which the screw ring 27 is welded. As shown in FIG. 3, the connection mechanism 30 is provided with a thick portion 31 along the outer periphery of the outer end and the screw ring 2 on the outer periphery of the inner end.
7 having a screw 32 to be screwed with the screw 26 of No. 7
And a push ring 35 having a right angle at the outer periphery of the inner end thereof and slidably fitted to the outer periphery of the fitting 33, and an attachment 36 formed of a round nut for attaching a chain on the inner surface of the top. And a headed cylindrical cap 38 provided with a spring piece 37 extending in the length direction on a part of the inner peripheral surface. Preferably, the fitting 33, the press ring 35, and the cap 38 are made In addition to being made of stainless steel with excellent properties,
When the cap 38 is removed, the cap 38 is connected to the attachment 25 provided on the body 3 by a chain 39 so as not to be detached from the fire hydrant.

FIG. 1 is a half sectional view showing a fire hydrant having an operation member 20 rotatably attached to a main body 1 and connected to a water supply device 40 buried underground.

The water supply device 40 is well known as a fire-fighting facility, and has a structure in which mounting flanges 41, 41 are provided at upper and lower ends.
And a mounting flange 4 at the upper and lower ends.
3 and 43, the upper mounting flange 43 of which is connected to the lower flange 41 of the water pipe 42 by a bolt and nut 44, and the lower mounting flange 43 of a valve housing 46 having a valve mechanism 45 provided therein. Pipe 47 to nut 4
A pipe-like driven rod 49 which is connected to the valve mechanism 45 and extends vertically while being axially attached to the valve mechanism 45 is connected to the connecting rod 24 via a joint member 50.

In use, in the state shown in FIG. 2, the cap 38 is removed by the fitting 33 against the elasticity of the spring piece 37, and the fitting of the fire hose is connected via the connecting mechanism 30 (not shown). ) Is connected to the water outlet 9, and then the handle 21 is rotated using a required tool.

Then, the valve mechanism 45 is opened and water is supplied to the water pipe 4.
2. Water is supplied from the water outlet 9 to the fire hose through the trunk 3.

[0020]

As described above, according to the present invention, the fire hydrant body to be exposed to the outside air is composed of a stainless steel body having excellent corrosion resistance and mechanical strength, so that the fire hydrant function and the appearance can be improved over a long period of time. It is economical because it can be maintained, plating is omitted, and it is durable, and it is economical because it can be made thin. Can be easily created.

[0021] The support mechanism may further include a mounting member formed by welding a stainless steel support plate having a peripheral edge welded to the opening at an outer periphery of an upper end of a cylindrical portion formed of a stainless steel pipe having a thread on an inner periphery thereof. An opening formed at the top by drawing compared to the thickness of the operating member because the screw is screwed to the screw and provided on the outer periphery and the supporting member integrally has a rotating operation part at the top. Has a large diameter, which is effective as a means for filling the difference.

[Brief description of the drawings]

FIG. 1 is a half cutaway view of a state in which a fire hydrant is connected to a water supply device.

FIG. 2 is a half sectional view of a fire hydrant.

FIG. 3 is a half sectional view of a body part having a support mechanism and partially omitted.

FIG. 4 is a sectional view of a mounting member.

FIG. 5 is a sectional view of a support member.

FIG. 6 is a sectional view of a screw ring.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 2 Flange 3 Body 4 Top 7 Opening 8 Rib 9 Water outlet 10 Mounting member 11 Support member 12 Screw 13 Cylindrical part 14 Plate piece 15 Cylindrical part 16 Rotating operation part 20 Operating member 21 Handle 22 Mounting shaft 23 Connecting rod 26 Screw 27 Screw Ring 28 Step 29 Neck 30 Connection Mechanism

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ identification code FI F16L 37/08 (58) Investigated field (Int.Cl. ⁷ , DB name) E03B 9/02 B23K 9/00 501 F16L 23 / 024 F16L 23/026 F16L 23/028 F16L 37/08

Claims (3)

(57) [Claims] A main body connected to a water supply device buried underground and standing on the ground has a flange at a lower end of a cylindrical body made of a stainless steel pipe, and has an opening at the center at an upper end. A support mechanism is attached to the opening, and an operation member for opening and closing a valve mechanism of the water supply device is rotatably supported by the support mechanism. Opening a water outlet on the upper side surface of the body, and attaching a screw ring to the water outlet, a fire hydrant attached with a connection mechanism for connecting a fire hose to the screw ring, the support mechanism, A mounting member formed by welding a stainless steel support plate whose peripheral edge is welded to the opening, and a screw that is screwed and tightened to the screw, on the outer periphery of the upper end of the cylindrical portion made of a stainless steel pipe having a screw on the inner periphery. Provided on the outer periphery, above A fire hydrant, comprising: a support member having a rotating operation unit integrally with the unit. 2. The fire hydrant according to claim 1, wherein a rib is formed outward in the water outlet by drawing, and a stainless steel screw ring is welded to the rib. 3. The fire hydrant according to claim 1, wherein the welding is performed by an inert gas welding method.