KR102422250B1 - Underground hydrant - Google Patents

Abstract

The present invention relates to an underground hydrant installed outside of a building or in a manhole on a roadside in preparation for a fire, and particularly, the underground hydrant has smooth fluidity due to the maximally secured opening and closing height of an opening/closing valve body and is suitable for shallow burying of water pipes by using a valve rod which rotates in place during both opening and closing of the opening/closing valve body. The underground hydrant of the present invention includes a valve casing body, a valve casing cover, an opening/closing valve, and a lifting member.

Description

Underground fire hydrant {UNDERGROUND HYDRANT}

The present invention relates to an underground fire hydrant installed outside a building or in a manhole on the side of a road in case a fire occurs. It relates to an underground fire hydrant having the suitability of a shallow water pipe burial with a valve rod rotating in place.

As a conventional underground fire hydrant, the one described in Patent Document 1 (Korea Utility Model No. 20-0210178) is proposed.

As shown in FIG. 5, the underground fire hydrant 1 of Patent Document 1 has a disk 5 that opens and closes the valve seat 9 is assembled with a pin or the like to a valve rod 7 that is a male screw rod, and the valve rod 7 ) is fastened to the nut (8) fixed to the lower part of the valve casing (2), and when the cap (4) is turned clockwise or counterclockwise with a jig, the valve rod (7) moves up and down with respect to the nut (8). transfer, causing the valve seat 9 to open or close.

However, in Patent Document 1, since the nut 8 is installed inside the valve casing 2, the opening height t of the disk 5 is very limited by the height of the structure for installing the nut 8 ( For example, up to 34 mm), which significantly lowers the fluidity.

In addition, in Patent Document 1, since the disk 5 is assembled to the lower end of the valve rod 7, when the fire water collides with the disk 5, it shakes and can be discharged with an uneven pressure.

In addition, in Patent Document 1, a rubber ring (not shown) is installed for sealing between the valve casing (2) and the valve rod (7), and the rubber ring cover (4') is a rubber ring (not shown) by fastening with bolts. It is installed in the form of pressing. However, when the rubber ring (not shown) is applied to the valve rod 7 by pressing the rubber ring cover 4 ′, the torque is large when the valve rod 7 is opened and closed, so it is not easy to operate.

To solve this problem, a conventional underground fire hydrant disclosed in Patent Document 2 (Korea Utility Model No. 20-0360573) is proposed.

As shown in FIG. 6 , the underground fire hydrant of Patent Document 2 has a female screw 121 formed on the upper body 120 , and a male screw fastened to the female screw 121 is formed on the valve rod 160 . In addition, the on/off valve 130 is also assembled to the lower end of the valve rod 160 .

However, when the valve seat 131 of Patent Document 2 is opened, the valve rod 160 also rises by the dotted line height s as much as the opening height of the on-off valve 130 .

Therefore, when installing an underground fire hydrant in a place where a shallow water pipe is buried, there is a risk that the valve rod 160 is exposed to the outside of the manhole, and in order to prevent this, the water pipe must be deeply buried. To bury it deeply, the excavation work becomes complicated and the constructability is not good.

In addition, the upper body 120 is painted to prevent rust. However, if you put a female screw on this painted spot, the painting will come off and rust. If it is rusted, the rotation of the valve rod 160 is not smooth.

In addition, in Patent Document 2, since the on-off valve 130 is assembled at the lower end of the valve rod 160, when the fire-fighting water collides with the on-off valve 130, it is shaken and the fire-extinguishing water can be discharged with a non-uniform pressure.

Patent Document 1: Korea Registered Utility Model No. 20-0210178 Patent Document 2: Korea Registered Utility Model No. 20-0360573

The present invention has been devised to solve the above-mentioned problem, and the purpose of the present invention is to provide an underground fire hydrant that can be applied to a shallowly buried water pipe by rotating the valve rod in place while securing the opening and closing height for the fire water to flow as much as possible. have.

In order to achieve the above object, the underground fire hydrant of the present invention includes a valve casing body including a lower opening and an upper opening, a flow port branching from one side of the upper opening, and a valve casing covering the upper surface of the valve casing body. a cover, an on/off valve for opening and closing a valve seat formed on a boundary surface between the lower opening and the upper opening, and a lifting member for raising and lowering the on/off valve, wherein the opening/closing valve includes a disk and a lower surface of the disk, an opening/closing packing for opening/closing the valve seat, a washer disposed on a lower surface of the opening/closing packing, and a bolt fastened to the disc to support the opening/closing packing and the washer to the disc, wherein the lifting member includes the upper opening a revolving nut inserted into a through hole formed in the valve casing cover facing and an O-ring for sealing between the through hole and the through hole while mounted on the outer circumferential surface of the revolving nut.

In addition, in the underground fire hydrant of the present invention, the support portion includes an inner surface locking jaw formed on the inner surface of the through hole, a first outer surface locking jaw formed on the outer peripheral surface of the revolving nut and caught on the inner surface locking jaw, and the revolving It includes a second outer surface engaging projection formed on the outer peripheral surface of the nut, and a release prevention cover that covers the second outer surface engaging projection while being fastened to the valve casing cover.

In addition, in the underground fire hydrant of the present invention, it further comprises an elevation guide part for guiding the elevation of the on/off valve, wherein the elevation guide part includes a rail protrusion formed on the inner surface of the valve casing of the upper opening and formed on the disk. and a rail groove fitted to the rail protrusion, wherein the rail groove is configured as a groove between two ribs formed on an upper surface and a side surface of the disk.

The effect of the underground fire hydrant according to the present invention will be described as follows.

By securing the maximum opening height of the on/off valve at the same time as the valve rod rotates in place, the height of the valve rod can be lowered as much as possible, which simplifies the excavation work of the hydrant when installing it in a shallowly buried water pipe. In addition, it is possible to smoothly extinguish the fire by increasing the flow of fire extinguishing water at the maximum opening height.

In addition, since the O-ring is installed between the outer surface of the revolving nut and the inner surface of the through hole of the casing valve, the torque applied to the revolving nut is very small without peeling off the paint, which is very excellent in usability.

In addition, since the valve rod and the disk are integrally formed, when the fire-fighting water collides, there is less shaking of the disk compared to the assembled type, so that the pressure of the fire-fighting water can be flowed as uniformly as possible.

In addition, by providing a guide part for guiding the lifting and lowering of the disk, it is possible to more firmly prevent shaking when the disk is raised and lower, as well as to serve as a reinforcing material to prevent bending of the disk.

Further scope of applicability of the present invention will become apparent from the following detailed description. However, it is to be understood that the detailed description and specific embodiments such as the preferred embodiments of the present invention are given by way of illustration only, since various changes and modifications within the spirit and scope of the present invention may be clearly understood by those skilled in the art.

1 is an external perspective view showing an underground fire hydrant according to a preferred embodiment of the present invention.
FIG. 2 is a perspective view of a main cross-section taken along line 2-2 of FIG. 1. FIG.
3 and 4 are open and closed cross-sectional views taken along line 3-3 of FIG. 1;
5 and 6 are cross-sectional views showing a conventional underground fire hydrant.

Hereinafter, the embodiments disclosed in the present specification will be described in detail with reference to the accompanying drawings, but the same or similar components are assigned the same reference numbers regardless of reference numerals, and redundant description thereof will be omitted. The suffixes "module" and "part" for components used in the following description are given or mixed in consideration of only the ease of writing the specification, and do not have distinct meanings or roles by themselves. In addition, in describing the embodiments disclosed in the present specification, if it is determined that detailed descriptions of related known technologies may obscure the gist of the embodiments disclosed in the present specification, the detailed description thereof will be omitted. In addition, the accompanying drawings are only for easy understanding of the embodiments disclosed in the present specification, and the technical idea disclosed herein is not limited by the accompanying drawings, and all changes included in the spirit and scope of the present invention , should be understood to include equivalents or substitutes.

Terms including ordinal numbers such as first, second, etc. may be used to describe various elements, but the elements are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another.

When a component is referred to as being “connected” or “connected” to another component, it is understood that the other component may be directly connected or connected to the other component, but other components may exist in between. it should be On the other hand, when it is said that a certain element is "directly connected" or "directly connected" to another element, it should be understood that no other element is present in the middle.

The singular expression includes the plural expression unless the context clearly dictates otherwise.

In the present application, terms such as “comprises” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It is to be understood that this does not preclude the possibility of the presence or addition of numbers, steps, operations, components, parts, or combinations thereof.

In the drawings, the size of the components may be exaggerated or reduced for convenience of description. For example, since the size and thickness of each component shown in the drawings are arbitrarily indicated for convenience of description, the present invention is not necessarily limited to the illustrated bar.

In cases where certain embodiments are otherwise practicable, a specific process sequence may be performed different from the described sequence. For example, two processes described in succession may be performed substantially simultaneously, or may be performed in an order opposite to the order described.

In the following embodiments, when a film, region, or component is connected, other films, regions, and components are interposed between the films, regions, and components as well as when the films, regions, and components are directly connected. It also includes cases where it is indirectly connected. For example, in the present specification, when it is said that a film, a region, a component, etc. are electrically connected, not only the case where the film, a region, a component, etc. are directly electrically connected, but also other films, regions, and components are interposed therebetween. Indirect electrical connection is also included.

1 is an external perspective view showing an underground fire hydrant according to a preferred embodiment of the present invention, FIG. 2 is a main cross-sectional perspective view taken along the line 2-2 of FIG. 1, and FIGS. 3 and 4 are 3- of FIG. It is an open and closed cross-sectional view taken by taking three lines.

1 to 4 , the underground fire hydrant 10 according to the present embodiment may include a valve casing 20 and an opening/closing mechanism 50 .

The valve casing 20 may include a valve casing body 30 and a valve casing cover 40 .

The valve casing body 30 may include a lower opening 31 , an upper opening 33 , and a flow path 35 branched from one side of the upper opening 33 .

The valve casing body 30 includes a first valve casing body 30a defining a lower opening 31 and an upper opening 33 , and a second valve casing body 30b defining a flow path 35 . It may be one-piece.

A drain valve 39 may be installed below the first valve casing body 30b.

At the lower end of the lower opening 31 , a flange 32 may be formed.

To the flange 32, a buried water pipe (not shown) may be fastened and connected.

A valve seat 37 may be formed at the interface between the lower opening 31 and the upper opening 33 .

The valve seat 37 may be formed on the inner surface of the first valve casing body 30a of the valve casing body 30 .

Also, as in this embodiment, the valve seat 37 may be a separate part.

A separate valve seat 37 may be press-fitted or screw-fastened to the inner surface of the first valve casing body 30a. This prefabricated valve seat 37, when worn, can be easily A/S.

The separate valve seat 37 may be made of a bronze material.

The valve casing cover 40 may be bolted to the upper end of the valve casing body 30 .

A through hole 41 communicating with the upper opening 33 may be formed in the valve casing cover 40 .

The through hole 41 may include a cylinder tube extending up and down based on the through hole formed in the valve casing cover 40 .

A through hole 43 communicating with the flow path 35 may be formed in the valve casing cover 40 .

The through hole 43 may include a cylinder tube extending upward based on the through hole formed in the valve casing cover 40 .

In the through hole 43 , a borrowing bracket 45 may be fastened.

A fire hose or a stand pipe may be fastened to the borrowing bracket 45 .

A cap 47 may be fastened to the borrowing bracket 45 .

The cap 47 may include a lid for opening and closing the plug 45 .

The opening/closing mechanism 50 may include an opening/closing valve 60 for opening and closing the valve seat 37 .

The on/off valve 60 may include a disk 61 .

The diameter of the disk 61 may be larger than the diameter of the valve seat 37 .

The opening/closing valve 60 may include an opening/closing packing 63 .

The opening/closing packing 63 may be disposed on the lower surface of the disk 61 .

The opening/closing packing 63 may be mounted in a mounting groove formed on the bottom edge of the disk 61 .

The outer part of the opening/closing packing 63 may block or open the upper surface of the valve seat 37 .

The on/off valve 60 may include a washer 65 .

The diameter of the washer 65 may be smaller than the inner diameter of the valve seat 37 .

The on/off valve 60 may include a bolt 67 .

The bolt 67 may be fastened to the disk 61 through the washer 65 and the opening/closing packing 63 .

When the bolt 67 is fastened, the washer 65 and the opening/closing packing 63 may be supported by the disk 61 .

The bolt 67 may be fastened to the lower end of the valve rod 73 to be described later.

The opening/closing mechanism 50 may include a lifting member 70 for raising and lowering the opening/closing valve 60 .

The lifting member 70 may include a revolving nut 71 .

The revolving nut 71 may have a cylinder shape with an upper side closed.

The revolving nut 71 may be rotatably inserted into the through hole 41 .

On the inner circumferential surface of the revolving nut 71 , a female screw 71a and an elevating space 71b of the valve rod 73 are formed.

The female screw 71a may be formed in the lower portion of the revolving nut 71 .

The inter-ride space 71b may be formed on the top of the revolving nut 71 .

On the upper end of the revolving nut 71 , the square part 72 may be assembled by means of a pin.

The square part 72 can be rotated by being fitted with a jig or a tool.

The lifting member 70 may include a valve rod 73 .

The valve rod 73 may include a male screw 73a fastened to the female screw 71a.

The valve rod 73 may have a rod shape integrally extending upward from the center of the upper surface of the disk 61 . Therefore, the integral type of the valve rod 73 and the disk 61 can suppress the shaking of the disk 61 by the pressure of the flowing fire water. In addition, since the valve rod 73 and the disk 61 are integrated, there is no need to assemble them.

The lifting member 70 may include a support part 75 for rotatably supporting the revolving nut 71 to the through hole 41 .

The support part 75 may include an inner surface engaging protrusion 75a formed on the inner surface of the through hole 41 .

The support part 75 may include a first outer surface engaging protrusion 75b.

The first outer surface engaging projection (75b) may be formed on the outer peripheral surface of the revolving nut (71).

The first outer surface engaging projection (75b) may be caught on the inner surface engaging projection (75a). Accordingly, when the revolving nut 71 is inserted into the through hole 41, it can no longer go down.

The support part 75 may include a second outer surface engaging protrusion 75c.

The second outer surface engaging protrusion 75c may be formed on the outer peripheral surface of the revolving nut 71 .

The second outer surface engaging protrusion 75c may be located at least at the same height as the upper surface of the through hole 41 or at a slightly higher height.

The support part 75 may include a separation prevention cover 75d.

The separation prevention cover 75d may have a donut shape.

The separation prevention cover 75d may be fastened to the valve casing cover 30 after being inserted into the revolving nut 71 . Then, the separation prevention cover (75d) can be pressed while covering the second outer surface engaging projection (75c).

Meanwhile, an O-ring 80 may be mounted on the outer circumferential surface of the revolving nut 71 .

The O-ring 80 may be mounted below the first outer surface engaging protrusion 75b.

The O-ring 80 may seal between the revolving nut 71 and the through hole 41 .

As described above, by forming the valve rod 73 integrally with the disk 61 and using the revolving nut 71, the opening/closing height T of the opening/closing valve 60 can be doubled than before, for example, about 63 mm. It is possible to reduce the torque applied by the O-ring 80 to the revolving nut 71 during rotation by preventing rust due to peeling of the paint because there is no need to process a female thread in the through hole 41, and the revolving nut ( 71) can be very convenient.

On the other hand, referring to Figure 2, the inside of the valve casing body 30, may include a lifting guide portion (90).

The elevation guide part 90 may guide the elevation of the on/off valve 60 with respect to the valve casing body 30 .

The elevating guide part 90 may include a rail protrusion 91 .

The rail protrusion 91 may be formed to protrude inward from the inner surface of the valve casing body 30 of the upper opening 33 .

The rail protrusions 91 may be positioned to face each other.

The elevating guide part 90 may include a rail groove 93 .

The rail groove 93 may be fitted into the rail protrusion 91 .

Accordingly, the rail groove 93 may be guided upward and downward along the rail protrusion 91 .

The rail groove 93 may be formed in the disk 61 .

The rail groove 93 may include two ribs 95 formed on the upper surface and the side surface of the disk 61 .

A space between the two ribs 95 may function as a rail groove 93 .

The two ribs 95 may serve as stiffeners for the disk 61 .

Accordingly, the two ribs 95 can contribute to the uniformity of the discharge pressure by holding the disk 61 from being bent and not shaken by the pressure of the flowing fire-fighting water.

Any or other embodiments of the invention described above are not mutually exclusive or distinct. Certain or other embodiments of the present invention described above may be combined or combined in their respective configurations or functions.

It will be apparent to those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit and essential characteristics of the present invention. The above detailed description should not be construed as restrictive in all respects and should be considered as illustrative. The scope of the present invention should be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the present invention are included in the scope of the present invention.

10: underground fire hydrant 20: valve casing
30: valve casing body 40: valve casing cover
50: opening and closing mechanism 60: opening and closing valve
61: disk 63: opening and closing packing
65: washer 67: bolt
70: elevating member 71: revolving nut
73: valve rod (male threaded rod) 75: support part
75a: inner engaging jaw 75b: first outer engaging jaw
75c: second outer surface engaging jaw 75d: release prevention cover
80: O-ring 90: elevating guide part
91: rail protrusion 93: rail groove
95: rib

Claims (3)

A valve casing body including a lower opening, an upper opening, and a flow port branching from one side of the upper opening, a valve casing cover covering an upper surface of the valve casing body, and a valve seat formed at an interface between the lower opening and the upper opening It includes an on/off valve for opening and closing, and a lifting member for lifting and lowering the on/off valve,
The on-off valve is
disk and
an opening/closing packing disposed on the lower surface of the disk to open and close the valve seat;
a washer disposed on the underside of the opening and closing packing;
and a bolt fastened to the disk to support the opening and closing packing and the washer to the disk,
The lifting member is
a revolving nut rotatably inserted into a through hole formed in the valve casing cover facing the upper opening;
a valve rod integrally protruding upward from the upper surface of the disk and fastened to the revolving nut;
and a support part for rotatably supporting the revolving nut to the through hole,
and an O-ring mounted on the outer circumferential surface of the revolving nut for sealing between the through hole and the through hole,
Further comprising an elevation guide part for guiding the elevation of the on-off valve,
The elevating guide unit,
a rail protrusion formed on the inner surface of the valve casing body of the upper opening;
and a rail groove formed on the disk and fitted to the rail protrusion,
The rail groove is composed of a groove between two ribs formed on the upper surface and the side surface of the disk,
underground fire hydrant.
The method according to claim 1,
The support part,
an inner surface engaging jaw formed on the inner surface of the through hole;
a first outer surface engaging jaw formed on the outer circumferential surface of the revolving nut and caught on the inner surface engaging jaw;
a second outer surface engaging protrusion formed on the outer peripheral surface of the revolving nut;
Containing a separation prevention cover that covers the second outer surface engaging jaw while being fastened to the valve casing cover,
underground fire hydrant.
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