KR102395696B1 - Rotatable ground type outdoor hydrant - Google Patents

Abstract

The present invention relates to a rotatable outdoor ground type fire hydrant installed on the boundary between a road and a sidewalk. Especially, the present invention relates to the rotatable outdoor ground type fire hydrant capable of improving maintenance of an O-ring while freely changing the direction of a discharge port by installing a cylindrical bush between a middle body and an upper body. The rotatable outdoor ground type fire hydrant of the present invention comprises: a stand pipe (100); a seat ring unit (200); an on-off valve body (300); an elevating unit (400); and a rotation supporting unit (500).

Description

Rotary outdoor ground-type fire hydrant {ROTATABLE GROUND TYPE OUTDOOR HYDRANT}

The present invention relates to a rotary type outdoor ground type fire hydrant installed on the boundary between a road and a sidewalk, and in particular, a rotary type that can improve the maintenance of O-rings while freely changing the direction of the outlet by installing a cylindrical bush between the middle and upper body It is about an outdoor ground-type fire hydrant.

A conventional rotary outdoor ground-type fire hydrant is proposed in the patent document (Korean Patent No. 10-2185188).

The upper body of the rotary outdoor ground type fire hydrant in the patent document has a first upper body flanged with a middle body, a second upper body having a discharge port, and a rotation support for an upper body that rotatably supports the second upper body with respect to the first upper body member may be included.

The upper body rotation support member may include a ball and an O-ring installed along the circumference between the inner surface of the second upper body while being fitted to the outer surface of the first upper body.

When the O-ring is fitted to the inner circumferential surface of the first upper body, the second upper body may be fitted to the outer circumferential surface of the first upper body.

After inserting a number of balls through the ball insertion hole of the second upper body, the assembly is completed when the ball insertion hole is closed with a mood bolt. That is, the ball serves to rotatably couple the first upper body and the second upper body.

When the second upper body is rotated with respect to the first upper body in a state in which the assembly is completed, the inner surface of the second upper body and the O-ring are in contact with each other.

These O-rings should be replaced if there is a defect during use or leakage occurs at the end of their service life.

In particular, the life of the O-ring is inevitably short because the O-ring is subjected to rotational friction while in contact with the second upper body, which is cast iron.

In order to maintain such an O-ring, unlike assembly, the second upper body cannot be pulled out from the first upper body unless the ball is removed.

However, it is almost impossible to take out the balls one by one through the ball insertion hole, so the first upper body must be separated from the middle body to replace the upper body with a cylindrical body.

Korean Patent Registration No. 10-2185188

The present invention has been devised to solve the above-mentioned problems, and it is an object of the present invention to provide a rotary outdoor ground type fire hydrant that is very convenient for maintenance of the O-ring while extending the life of the O-ring.

In order to achieve the above object, the rotary outdoor ground type fire hydrant of the present invention includes a lower body through which firefighting water flows, an upper body through which a discharge port for discharging firefighting water is formed, and a stand pipe including a middle body disposed between the lower body and the upper body. ; a seat ring installed on the inner surface of the lower body; an opening/closing valve body for opening and closing the seat ring; a lifting/lowering unit for moving the opening/closing valve body upward to the seat ring unit (closed)/lowering/removing (open); and a rotation support part for rotatably supporting the upper body with respect to the middle body, wherein the rotation support part includes a cylindrical bush for rotatably supporting the upper body while being fixed to the middle body, the inner peripheral surface of the upper body and the cylinder An O-ring installed between the outer peripheral surface of the bush, a protruding rim formed on the outer peripheral surface of the cylindrical bush and protruding between the upper end of the middle body and the lower end of the upper body, a counter flange surrounding the lower surface and the outer peripheral surface of the protruding rim, the upper body It may include a fastening part for fastening the flange and the counter flange of the.

In addition, in the rotary outdoor ground type fire hydrant of the present invention, the cylindrical bush is screwed to the middle body, and an O-ring is installed between the lower surface of the protruding edge and the upper end of the middle body, the middle body, the cylindrical bush, and the It can be installed with the same inner diameter of the upper body.

The effect of the rotary outdoor ground type fire hydrant according to the present invention will be described as follows.

By adopting and combining the cylindrical bushing and the protruding edge between the middle and upper body, the O-ring rotates while contacting the cylindrical bushing, which is a bearing metal, as opposed to the O-ring touching the cast iron and rotating to improve durability by maximally suppressing the friction of the O-ring. can

In addition, by adopting and coupling the cylindrical bush and the protruding edge between the middle and the upper body, when maintenance of the O-ring is required, only the O-ring can be replaced because the upper body is pulled out for the cylindrical bush.

In addition, since the cylindrical bush is screwed into the middle, it is easier to assemble and disassemble than to force fit, and it can catch the falling out by the pressure of water for firefighting.

In addition, since the cylindrical bush is screwed to the middle body, it is easy to separate the cylindrical bush from the middle body, and maintenance of the O-ring installed between the cylindrical bush and the middle body can be very easy.

In addition, since the inner diameter of the middle body, the cylindrical bush and the upper body are all the same, the discharged fire water flows smoothly without colliding with it, thereby remarkably improving the pressure loss.

Further scope of applicability of the present invention will become apparent from the following detailed description. However, it should 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 a rotary outdoor ground-type fire hydrant according to a preferred embodiment of the present invention.
Fig. 2 is a cross-sectional view taken along line 2-2 of Fig. 1;
Figure 3 is an enlarged cross-sectional view showing a portion A of Figure 2;
Figure 4 is an exploded cross-sectional view of Figure 3;
5 is an enlarged cross-sectional view showing the lower portion of FIG.
6 and 7 are enlarged cross-sectional and perspective views illustrating the open state of FIG.
8 is a rear perspective view showing a lower seat washer;
9 is an enlarged cross-sectional view illustrating a portion B of FIG. 2;
Figure 10 is an enlarged perspective view showing the upper part of Figure 1;
11 is a cross-sectional view taken along line 11-11 of FIG. 10;

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 the 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 an ordinal number such as 1st, 2nd, 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 may be directly connected or connected to the other component, but it is understood that 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 the other element does not exist 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 the features, numbers, steps, operations, components, parts, or combinations thereof described in the specification exist, but one or more other features It should be understood that this does not preclude the existence 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 may be implemented otherwise, 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. and 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, other films, regions, components, etc. are interposed therebetween. Indirect electrical connection is also included.

1 is an external perspective view showing a rotary outdoor ground type fire hydrant 10 according to a preferred embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along the line 2-2 of FIG. 1 .

1 and 2, the rotary outdoor ground-type fire hydrant 10 according to the present embodiment has an L-shaped stand pipe 100 when viewed from the outside, and is installed inside the stand pipe 100 The seat ring part 200, the on/off valve body 300 for opening and closing the seat ring part 200, and the lifting/lowering part for ascending approach (closing) / descending and retreating (opening) the on-off valve body 300 to the seat ring part 200 400 and a rotation support unit 500 for rotatably supporting the upper body 170 with respect to the middle body 150 of the stand pipe 100 .

The rotary outdoor ground type fire hydrant 10 according to the present embodiment may include a stand pipe 100 .

The stand pipe 100 may include a lower body 110 through which fire water is introduced, an upper body 170 , and a middle body 150 connecting the lower body 110 and the upper body 170 .

The lower body 110 may include a horizontal pipe 120 connected to a connection pipe such as a water supply pipe, and a vertical pipe 130 connected to the middle body 150 .

The chamber CB where the horizontal pipe 120 and the vertical pipe 130 meet may be a space in which the on/off valve body 300 moves up and down.

The middle body 150 may have a vertical pipe shape.

The upper body 170 may have a discharge port 171 formed therein. The discharge port 171 may discharge water for firefighting. The discharge ports 171 may be installed on both upper side surfaces of the upper body 170 at 180 degree intervals of the upper body 170 .

The rotary outdoor ground type fire hydrant 10 according to the present embodiment may include a rotary support unit 500 . The rotation support unit 500 may rotatably support the upper body 170 with respect to the middle body 150 .

3 and 4 , the rotation support unit 500 may include a cylindrical bush 510 . The cylindrical bush 510 may be made of a bearing metal. For example, the cylindrical bush 510 may be made of bronze. The cylindrical bush 510 may be installed between the inner surface of the middle body 150 and the inner surface of the upper body 170 . The lower end of the cylindrical bush 510 may be placed on the step 501 of the middle body 150 . On the upper end of the cylindrical bush 510, the step 503 of the upper body 170 may be rotatably placed. A male screw 511 may be formed on the lower side of the cylindrical bush 510 . The male screw 511 may be fastened to the female screw 513 formed on the inner circumferential surface of the body 150 . The steps 501 and 503 can be stably supported between the middle body 150 , the upper body 170 , and the cylindrical bush 510 . Steps 501 and 503, the inner diameter (Φ1) of the middle body 150, the inner diameter (Φ2) of the upper body 170, and the inner diameter (Φ3) of the cylindrical bush 510 can all be arranged to be the same. Accordingly, the inner diameter (Φ1) of the middle body 150, the inner diameter (Φ2) of the upper body 170, and the inner diameter (Φ3) of the cylindrical bush 510 are placed on one vertical line, and can be configured as a single tube. . This may have eliminated the pressure loss because it flows along the smooth surface when the fire water is discharged.

The rotation support unit 500 may include an O-ring 520 . The O-ring 520 may seal between the outer peripheral surface of the cylindrical bush 510 and the inner peripheral surface of the upper body 170 . The O-ring 520 may be mounted in the groove 521 of the upper body 170 . The O-ring 520 may be compressed by contacting the outer peripheral surface of the cylindrical bush 510 .

The rotation support unit 500 may include a protruding edge 530 . The protruding edge 530 may be formed on the outer peripheral surface of the cylindrical bush 510 . For example, the protruding edge 530 may be an outward flange type. The protruding edge 530 may be integrally formed with the cylindrical bush 510 . The protruding edge 530 may be placed to protrude between the upper end of the middle body 150 and the lower end of the upper body 170 . 3 and 4 , the outer surface 531 of the protruding edge 530 may protrude further outward than the upper outer surface 532 of the middle body 150 .

The rotation support unit 500 may include a counter flange 540 . The counter flange 540 may have a shape surrounding the lower surface 533 and the outer surface 531 of the protruding edge 530 . The counter flange 540 may include a hollow first counter flange 541 . The first counter flange 541 may support the lower surface 533 of the protruding edge 530 . The counter flange 540 may include a second counter flange 543 . The second counter flange 543 may surround the outer surface 531 of the protruding edge 530 . The second counter flange 543 may have a shape protruding upward from the outer surface of the first counter flange 541 . A bolt fastening hole 544 may be formed in the second counter flange 543 . The counter flange 540 may have a hollow groove shape.

The rotation support unit 500 may include a fastening unit 550 . The fastening part 550 may include a bolt 551 and a nut 553 . The bolt 551 may be inserted and installed through the flange 557 and the second counter flange 543 of the upper body 170 . The nut 553 may be fastened to the bolt 551 . The fastening part 550 may further include a washer 555 . The washer 555 may be installed between the second counter flange 543 and the nut 553 . Through the fastening portion 550 , the upper body 170 and the counter flange 540 may rotate with respect to the cylindrical bush 510 .

The rotation support unit 500 may include an O-ring 560 . The O-ring 560 may be installed between the lower surface 533 of the protruding edge 530 and the upper end of the middle body 150 . The O-ring 560 may seal between the lower surface 533 of the protruding edge 530 and the upper end of the middle body 150 . An undercut groove 561 in which the O-ring 560 is to be placed may be formed at the upper end of the body 150 .

1, 10 and 11 , the rotation support unit 500 may include a rotation stop stopper 570 . The rotation stop stopper 570 may determine the rotation position of the upper body 170 . The rotation stopper 570 may include a bolt 571 and a female screw portion 573 . The female thread part 573 may be formed on the second counter flange 543 . A bolt 571 may be fastened to the female screw portion 573 . The bolt 571 may be pressed or released from the outer surface 531 of the protruding edge 530 . The rotation stopper 570 may include a washer 575 . The washer 575 may be installed between the counter flange 540 and the head of the bolt 571 . The washer 575 may be integrally formed with the head of the bolt 571 .

Of course, the O-ring 520 can stop the rotational position with the force pressed to the outside of the cylindrical bush 510, but by further installing the rotation stop stopper 570, the rotational position of the discharge port 171 can be definitely stopped. .

Meanwhile, referring to FIG. 9 , a first sealing part 140 may be installed between the lower body 110 and the middle body 150 . The first sealing part 140 may include a gasket 141 . The gasket 141 may be placed over the upper surface of the outer edge of the seat ring body 210 of the seat ring 200 and the upper surface of the inner edge of the vertical pipe 130 . The first sealing part 140 may include a pressing protrusion 143 . The pressing protrusion 143 may protrude downward from the lower surface of the middle body 150 to press the gasket 141 . The first sealing part 140 may include a stopper 145 . The stopper 145 may be formed to protrude upward from the upper surface of the seat ring body 210 . Therefore, the stopper 145 can prevent the inner protrusion due to the compression of the gasket 141 .

Due to this first sealing part 140, the inner surface of the middle body 150 and the inner surface of the seat ring 220 of the seat ring part 200 are in a straight line, and when the lower body 110 and the middle body 150 are assembled Even if the gasket 141 is contracted, it does not protrude to the inside, which is a space in which the gasket 141 is constrained and flows inside the first sealing part 140 .

In particular, since the gasket 141 serves to prevent the inserted seat ring body 210 from being separated upward, it cannot be replaced with an O-ring, so the structure of the first sealing part 140 can be adopted. In addition, the first sealing unit 140 may be a configuration in which the seat ring unit 200 to be described later adopts an insertion method rather than a fastening method.

The seat ring 200 is inserted and installed near the exit of the vertical pipe 130 .

That is, as shown in FIGS. 5 to 7 , the seat ring unit 200 includes a seat ring body 210 inserted into the inner surface of the vertical tube 130 , and a seat ring extending downward from the lower surface of the seat ring body 210 . 220 and the second locking jaw 230 formed on the seat ring 220 and caught on the first locking jaw 131 formed on the inner surface of the vertical tube 130 , and formed in the center of the seat ring body 210 . The valve stem 410 may include a guide boss 250 for guiding so as to be able to move up and down, and a plurality of arms 270 connecting between the seat ring body 210 and the guide boss 250 .

The seat ring body 210 may have a disk shape. In the center of the seat ring body 210, a polygonal guide boss 250 may be formed. The seat ring 220 may extend downward from the edge of the lower surface of the seat ring body 210 .

A second locking jaw 230 is formed on the outer circumferential surface of the seat ring 220 , and an O-ring may be installed between the first and second locking jaws 131 and 230 .

As shown in FIG. 7 , two arms 270 are formed in a 180 degree direction, thereby minimizing contact with passing water and maximally securing a passage flow area.

In addition, since the plurality of arms 270 are inserted and installed in a direction perpendicular to the discharge port 171 , the fire water that has passed through the plurality of arms 270 flows toward the discharge port 171 as it is, thereby reducing frictional loss as much as possible.

It is possible to fit the plurality of arms 270 at right angles to the discharge ports 171 on both sides because the seat ring 200 is adopted as an insertion method rather than a conventional fastening method.

The opening/closing valve body 300 is disposed under the upper seat washer 310 and the upper seat washer 310 caught on the locking jaw 411 formed on the valve stem 410, as shown in FIGS. 5 to 7 . The lower seat washer 330 to be used, the seat packing 350 for opening and closing installed between the upper and lower seat washers 310 and 330, and the upper and lower seats fastened to the valve stand 410 and between the locking jaws 411 Washers 310 and 330 and a nut 370 for supporting the opening and closing seat packing 350 may be included.

In particular, the opening/closing valve body 300 may be installed by being fitted into the rod-shaped valve stem protrusion 413 extending downward from the polygonal valve stem 410 .

The opening and closing seat packing 350 has a donut shape, and may open and close the lower inner surface of the seat ring 230 .

The upper seat washer 310 may support the upper side of the opening/closing sheet packing 310 while pressing down.

In addition, the upper seat washer 310 is smaller than the inner circumferential diameter of the seat ring 230, and enters the inside when closed as shown in FIG. 5, while the opening and closing seat packing 350 is the lower inner surface of the seat ring 230 It can be sealed by pressing firmly.

The lower seat washer 330 may surround and support the lower side of the outer circumferential surface of the opening/closing sheet packing 350 while pressing it upward.

In particular, the lower surface of the lower seat washer 330 may be in close contact with the floor (F).

The lower seat washer 330 may be configured in a cap shape. The lower seat washer 330 is, as shown in FIGS. 7 and 8 , an upper plate 331 having a fitting hole 332 fitted to the valve stem protrusion 413 , and a lower edge of the upper plate 331 . It may include a side wall 333 extending to the.

In addition, as shown in FIGS. 6 and 7 , the lower end surface 334 of the side wall 333 may be in close contact with the floor F. As shown in FIG.

The floor F may be a flat floor of the chamber CB where the horizontal tube 120 and the vertical tube 130 meet.

Inside the lower body 110, it may include a receiving groove (600). Receiving groove 600 may be a groove concave downward from the flat floor (F).

As such a receiving groove 600 and the lower seat washer 330 of the cap shape are adopted and coupled, the opening/closing valve body 300 is maximally downward by the depth at which the nut 370 is accommodated in the receiving groove 600, so that the flow space ( opening and closing height) can be much wider. For example, it can be seen that the opening and closing height is increased by 250% from 38 mm to 95 mm compared to when the conventional valve stem protrusion 413 touches the floor F.

In addition, since the lower end surface 334 of the side wall 333 comes into close contact with the floor F, it does not flow between the lower end surface 334 and the floor F, so that a vortex does not occur and the flow efficiency is also very excellent. can

Since the lower seat washer 330 is in the shape of a thin cap, it is possible to enlarge the inner diameter of the seat ring 220 . For example, in this embodiment, it is possible to increase from the conventional 110φ to 130φ.

Of course, even if the lower seat washer 330 has a rectangular shape, it is okay to adhere to the floor F, but if the inner diameter of the seat ring 220 increases, its weight increases, which may interfere with lifting and lowering.

As described above, the cap shape of the lower seat washer 330 has a rib 337 connecting the fitting hole 332 and the inner surface of the side wall 333 as shown in FIG. can be formed.

The upper seat washer 310 may include a cover plate 311 pressing the upper surface of the sheet packing 350 for opening and closing, and a vertical rib 313 protruding downward from the bottom surface of the cover plate 311 . The vertical rib 313 may take a slimming structure.

When fastening, the lower end of the vertical rib 313 comes into contact with the upper surface of the upper plate 311 to prevent bending of the cover plate 311 . In addition, the seat packing 350 for opening and closing is installed between the side of the vertical rib 313 and the departure preventing sill 335 of the upper plate 311, so that the opening and closing seat packing 350 can be restrained from moving in the radial direction. .

As shown in FIG. 2 , the lifting unit 400 may include a valve stand 410 in which an on/off valve body 300 is installed on the lower side, and a lifting stand 430 for raising and lowering the valve stem 410 . there is.

The valve seat 410 may have a polygonal shape, such as the guide boss 250 .

On the lower side of the valve stem 410 , after the opening/closing valve body 300 is fitted, the (lock) nut 370 is fastened to support the rod-shaped valve stem protrusion 413 may be formed to extend.

That is, a locking jaw 411 is formed on the lower side of the valve stem 410 , and the opening/closing valve body 300 is inserted from the bottom and raised up until it is caught on the locking jaw 411 , and then fastened with the nut 370 to complete the assembly. can be

In this case, the lower end of the valve stem protrusion 413 may protrude further lower than the lower end 334 of the lower seat washer 330 .

The elevating platform 430 is located at the center of the upper end of the upper body 170 , but has a revolving nut 431 fastened to the upper end side of the valve stem 410 and a screw thread therein, and a pin on the upper side of the valve stem 410 . It may include an elevating screw rod 433 that is connected by and is screwed with the revolving nut 431 to be lifted.

Depending on the direction in which the revolving nut 431 is rotated in place, the elevating screw rod 433 elevates and lowers, and this elevating movement is transmitted to the valve seat 410 as it is, so that the opening/closing valve body 300 can be opened or closed. there is.

The receiving groove 600 is formed as a downwardly concave groove on the bottom surface of the horizontal tube 110 .

When the valve stem protrusion 413 is accommodated in the receiving groove 600 from the closed state as shown in FIG. 5 to the open state as shown in FIGS. By descending further, it is possible to minimize the collision with fire water while increasing the open space.

As seen above, if the inner diameter of the seat ring 220 is enlarged by adopting the slimming structure of the upper and lower seat washers 310 and 330, the middle body 150 is formed with the first non-expanding part 150a and It may be composed of a first expanded tube portion (150b).

The first expanded pipe portion 150b is a portion fastened with the lower body 110 , and its inner diameter is the same as the inner diameter of the seat ring 220 .

Similarly, the upper body 170 may be composed of a second non-expanded tube portion 170a and a second expanded tube portion 170b.

The second non-expanded tube portion 170a may be connected to the first non-expanded tube portion 150a having the same inner diameter.

A discharge port 171 may be formed in the second expanded pipe portion 170b.

When the second expanded pipe portion 170b of the upper body 170 is 10 to 25% wider than the second non-expanded pipe section 170a, friction loss can be reduced as much as possible without lowering the flow pressure.

On the other hand, as shown in FIGS. 10 and 11 , the hose connection pipe 180 may be screwed to the outlet 171 .

As shown in FIG. 11 , a protrusion rim 182 caught on the end face 172 of the outlet 171 may be formed to protrude around the outer periphery of the hose connection pipe 180 .

At this time, the protrusion rim 182 may be further formed with a tool seat groove 184 along its circumference as shown in FIG. 10 .

Therefore, when assembling/disassembling the hose connection pipe 180 to the discharge port 171 , the tool can be operated after being inserted into the tool seat groove 184 .

Since the tool seat groove 184 is formed in the existing protruding rim 182, the inner circumferential surface of the hose connection pipe 180 becomes smooth, and friction or resistance due to the discharge of fire-fighting water may not occur.

As shown in FIG. 11 , one side of the protruding rim 182 may be formed as an inclined surface 183 that extends upward with respect to the end surface 172 of the outlet 171 .

The inclined surface 183 may have a chamfer shape in which one edge of the protruding rim 182 is chamfered.

Due to this inclined surface 183, when fastening/disassembling the hose connection pipe 180 to the discharge port 171, the end surface 172 of the discharge port 171 does not come into contact with each other, and the paint is peeled off and rust is prevented. can do.

A cap 190, which is a cover, is screwed to the hose connection pipe 180 to prevent dust, etc. from entering when not in use.

10, the operation head 191 of the cap 190, the revolving nut 431, and the bolt 571 head of the rotation stopper 570 can be opened or loosened only by using the same tool (wrench). . The use of the same tool (wrench) is to prevent the general public from arbitrarily loosening or tightening by hand.

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

It is 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 exemplary. 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: rotary outdoor ground type fire hydrant 100: stand pipe
110: lower body 120: horizontal tube
130: vertical pipe 140,160: first and second sealing parts
150: middle 170: upper body
171: outlet 180: hose connection pipe
182: protrusion rim 184: tool seat groove
200: seat ring unit 210: seat ring body
220: seat ring 131,230: first, locking jaw
250: information boss 270: arm
300: on/off valve body 310,330: upper and lower seat washers
311: cover plate 313: vertical rib
331: top plate 333: side wall
335: departure bump 337: rib
350: seat packing for opening and closing 370: (lock) nut
400: elevating unit 410: valve seat
413: valve stem protrusion 500: rotation support
510: cylindrical bush 530: protruding edge
520,560: o-ring 540: counter flange
550: fastening part 570: rotation stop stopper
600: receiving groove CB: chamber
F: floor

Claims (3)

Stand pipe ( 100); a seat ring 200 installed on the inner surface of the lower body 110; an opening/closing valve body 300 for opening and closing the seat ring 200; an elevating unit 400 for ascending approach (closing)/lowering and retreating (opening) the opening/closing valve body 300 to the seat ring unit 200; and a rotation support unit 500 for rotatably supporting the upper body 170 with respect to the middle body 150.
The rotation support unit 500,
A cylindrical bush 510 for rotatably supporting the upper body 170 while being fixed to the middle body 150, and
an O-ring 520 installed between the inner circumferential surface of the upper body 170 and the outer circumferential surface of the cylindrical bush 510;
a protruding edge 530 formed on the outer peripheral surface of the cylindrical bush 510 and protruding between the upper end of the middle body 150 and the lower end of the upper body 170;
A counter flange 540 surrounding the lower surface 533 and the outer peripheral surface 531 of the protruding edge 530, and
and a fastening part 550 for fastening the flange of the upper body 170 and the counter flange 540,
The lower end of the cylindrical bush 510 is placed on the step 501 of the middle body 150,
On the upper end of the cylindrical bush 510, the step 503 of the upper body 170 is rotatably placed,
On the lower side of the cylindrical bush 510, a male screw 511 is formed,
The male screw 511 is fastened to the female screw 513 formed on the inner circumferential surface of the body 150,
An O-ring 560 is installed between the lower surface 533 of the protruding edge 530 and the upper end of the middle body 150,
Rotary outdoor ground fire hydrant.
The method according to claim 1,
The inner diameter of the middle body 150 and the cylindrical bush 510 and the upper body 170 is the same,
Rotary outdoor ground fire hydrant.
The method according to claim 1 or 2,
It includes a rotation stop stopper 570 on the rotation support unit 500,
The rotation stop stopper 570 is,
a female screw portion 573 formed on the counter flange 540;
Containing a bolt 571 that is fastened to the female screw portion 573 to press / release the outer surface of the protruding edge 530,
Rotary outdoor ground fire hydrant.

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