KR102384354B1 - Flexible joint fitting - Google Patents

Abstract

The expansion and contraction pipe fitting according to the present invention includes an opening/closing lock valve connected to a branch pipe of a transverse pipe to control the flow of firefighting water supplied from the branch pipe; an opening/closing key pipe connected to the opening/closing lock valve to open the opening/closing lock valve; a rotation reference shaft pipe connected to the opening/closing key pipe to relatively rotate the opening/closing lock valve and the opening/closing key pipe; Expansion pipe fixedly connected to the rotation reference shaft pipe; and a reducer fixedly connected to the expansion pipe and the sprinkler head between the expansion pipe and the sprinkler head.

Description

Expansion Piping Fittings {FLEXIBLE JOINT FITTING}

The present invention relates to a telescopic pipe fitting positioned between a branch pipe branching from a transverse pipe of a building and a sprinkler head exposed from a ceiling of a building.

In general, when a building is composed of a plurality of floors, each floor has a transverse column, and a building has a vertical column connecting the transverse columns of neighboring floors. Here, the standing pipe is located along the side wall of the building to deliver water to the transverse pipe, and the transverse pipe is located on the ceiling for each floor to supply water to the water facilities of each floor.

Therefore, the horizontal pipe is connected to the expansion pipe through a fitting in consideration of the ceiling structure in the fire protection facility among the water facilities, and water is sequentially supplied to the reducer and the sprinkler head through the fitting and the expansion pipe. supply The reducer is connected by welding or threading to the telescoping tubing and the sprinkler head.

In addition, the fitting is connected to the connecting portion of the branch pipe of the transverse pipe and the expansion and contraction pipe by welding or threading. Between the transverse pipe and the sprinkler head, welded components (= fittings, expansion pipes and reducers) reduce leak points more than threaded components and are mainly used in firefighting high-pressure plumbing equipment.

However, the fitting twists the expansion and contraction pipe compared to the initial shape while being connected to the branch pipe of the transverse pipe by welding in consideration of the surrounding conditions of the branch pipe of the transverse pipe. In particular, the fittings distort the telescopic piping more severely in a pipe ceiling type ceiling than in a T-grid ceiling type ceiling.

This is because the pipe sealing type ceiling has a more complex structure than the T-grid sealing type ceiling. When a swivel nipple is introduced into the fitting, the swivel nipple is rotatable with respect to the expansion and contraction pipe to prevent distortion of the expansion and contraction pipe, but does not block the supply of water from the transverse pipe in case of a failure of the firefighting high-pressure pipe equipment.

In order to find the cause of the failure of the fire-fighting high-pressure piping system, after the water is drawn out through the transverse pipe and the inlet pipe, the fitting, the swivel nipple, the expansion pipe, and the reducer are separated from the transverse pipe and the sprinkler head. Therefore, the identification of the cause of the failure of the fire-fighting high-pressure piping system causes water wastage and requires long-term consumption.

On the other hand, welding application to the fitting is similarly disclosed as a prior art in Korean Patent Publication No. 10-1612084 and Korean Patent Publication No. 10-1187548.

Korean Patent Publication No. 10-1612084 Korean Patent Publication No. 10-1187548

The present invention has been devised to solve the problems of the prior art, and is applied regardless of the ceiling structure to prevent distortion of the expansion and contraction piping and to facilitate separation from the transverse pipe while blocking the supply of water from the transverse pipe in case of a failure of the firefighting high-pressure piping facility. It is an object to provide suitable expansion pipe fittings.

The expansion and contraction pipe fitting according to the present invention is connected to the branch pipe so as to be located between the branch pipe branching from the lateral pipe of the building and the sprinkler head exposed from the ceiling of the building, the flow of firefighting water supplied from the branch pipe an on/off lock valve that controls; an opening/closing key pipe connected to the opening/closing lock valve to open the opening/closing lock valve; a rotation reference shaft pipe connected to the opening/closing key pipe to relatively rotate the opening/closing lock valve and the opening/closing key pipe; an expansion and contraction pipe fixedly connected to the rotation reference shaft pipe; and a reducer fixedly connected to the expansion pipe and the sprinkler head between the expansion pipe and the sprinkler head, wherein the opening/closing lock valve and the opening/closing key pipe are sequentially connected to the branch pipe. It is characterized in that it excludes distortion of the expansion and contraction pipe relative to the branch pipe or sprinkler head.

The opening/closing lock valve may include a lower body and an upper body sequentially stacked; and an opening/closing lock surrounded by the lower body and the upper body, wherein the lower body and the upper body have a lower hollow and an upper hollow, respectively, and communicate through the lower hollow and the upper hollow, and the lower body and and a waterproof ring between the upper body.

The lower body, when viewed from the outside, has a balcony protruding from the lower outer wall along the lower outer wall, supports the upper body on the balcony, and surrounds the lower hollow when viewed from the inside, sequentially It may have a first lower inner wall and a second lower inner wall that are laminated to each other, and may have a length smaller than that of the upper body in a longitudinal direction of the opening/closing lock valve.

The first lower inner wall is narrowed in multiple stages toward the second lower inner wall and tapered toward the center of the lower body, and the second lower inner wall is formed with the first lower inner wall along the radial direction of the lower body. Compared to the lower inner wall, it may be positioned vertically on the veranda that extends closer to the balcony.

The upper body, when viewed from the outside, is supported on the balcony of the lower body to taper in multiple steps from the lower body toward the branch pipe, and when viewed from the inside, to surround the upper hollow, sequentially stacked It may have a first upper inner wall and a second upper inner wall that are

The first upper inner wall surrounds the first upper hollow of the upper hollow, is threadedly coupled to the outer wall of the lower body exposed on the balcony of the lower body, and is integral with the triangular fixed wing at the uppermost level is formed, and the second upper inner wall surrounds a second upper hollow having a smaller diameter than the first upper hollow, and exposes the triangular fixed wing to the branch pipe, and the triangular fixed wing includes the first In the upper inner wall, the first upper hollow may be divided into thirds, and a through hole may be provided in the center of the triangular stator blade.

The upper body, when welded to the branch pipe, has a chamfer shape at the end of the upper body in contact with the branch pipe, or when screwed to the branch pipe, in the upper body in contact with the branch pipe Having a female or male thread of the opposite type to the branch pipe, or when coupled to the branch pipe through a grooved coupler, to form an externally symmetrical shape with the branch pipe, in contact with the branch pipe The upper body may have a coupling groove.

The opening and closing lock opens and closes with a nut, a key support, a washer, a buffer pad, and a channel from the lower body toward the upper body to pass through the triangular fixed wing of the upper body while performing elastic movement in the lower body and the upper body It includes a pad, a top-shaped core, and a spring, and the channel opening/closing pad may have a larger diameter than the buffer pad and the washer.

The top-shaped core has a larger diameter of an upper shaft positioned above the disk than a lower shaft positioned below the circular disk, and is surrounded by the spring on the upper shaft and positioned at the center of the triangular stator blade of the upper body Passing through the through hole, the lower shaft may sequentially pass through the water channel opening/closing pad, the buffer pad, the washer, and the key support to perform screw thread coupling with the nut.

The top-shaped core retracts the upper shaft from the triangular stator wing when the spring is expanded or advances the upper shaft toward the triangular stator wing when the spring is compressed, and the channel opening/closing pad has the same diameter as the disk. can have

The spring is fixed to the triangular fixed wing through one end and is in close contact with the disk through the other end, and through expansion and compression of the spring, the nut, the key support, the washer, the buffer pad, and the channel opening/closing pad and elastic motion of the top-shaped core.

The key rest, in the shape of a chair in which a backrest and a handrest are excluded, includes four feet in contact with the opening/closing key pipe, and a resting member spaced apart from the opening/closing key pipe to connect the four legs, and the seating unit includes: , having a larger diameter than the washer, the nut may be positioned under the seat and surrounded by the four feet.

The opening/closing key pipe, viewed from the outside, is divided into a first pipe part, a second pipe part, and a third pipe part, and a knurling pattern for improving the grip feeling in the second pipe part and the opening/closing lock valve in the third pipe part Including an inclined shape tapering toward the narrow, when viewed internally, a first inserted hollow body having one inner diameter in the first tube portion, and a fallopian tube shape from the first inserted hollow body and taper in a multi-stage shape It may include a narrower second to fourth inserted hollow body, and a fifth inserted hollow body having the same inner diameter smaller than that of the fourth inserted hollow body.

The third pipe part may be inserted into the lower body of the opening/closing lock valve to be threadedly coupled to the lower body when viewed from the outside.

When the lower body consists of first and second lower inner walls sequentially stacked. The opening/closing key pipe may be inserted into the lower body and threadedly coupled to the lowermost end of the multi-stage shape of the first lower inner wall.

The opening/closing key pipe pushes the key support of the opening/closing lock toward the triangular fixed wing of the upper body by threaded coupling with the lowest end of the first lower inner wall from the veranda of the second lower inner wall of the opening/closing lock The lower hollow may be opened while separating the opening/closing pad through the channel.

When the opening and closing key pipe is separated from the lowest end of the first lower inner wall, the opening and closing pad of the opening and closing lock on the veranda of the second inner wall by pulling the key support of the opening and closing lock from the triangular fixed wing of the upper body It is possible to close the lower hollow while seated.

The rotation reference shaft pipe has an outer diameter that increases in multiple stages from one side to the other side when viewed from the outside, and sets the last end positioned near the other side as a movement prevention stopper, and around the movement prevention stopper from the other side It has a contact ring, when viewed from the inside, from the one side toward the other side may have a housing hollow body surrounding the hollow body and the water channel hollow body surrounding the other side hollow in sequence.

The contact ring is confined between the opening/closing key pipe and the rotation reference shaft pipe inside the opening/closing key pipe when the rotation reference shaft pipe is inserted into the opening/closing key pipe, and the opening/closing key pipe and the rotation reference shaft It is possible to prevent water leakage between the pipes, and to minimize friction between the opening/closing key pipe and the rotation reference shaft pipe when the opening/closing key pipe rotates relative to the rotation reference shaft pipe.

The housing hollow body may accommodate the bellows pipe protruding from the expansion and contraction pipe and fix the bellows pipe to the rotation reference shaft pipe by welding.

The rotation reference shaft pipe has a movement preventing stopper and a contact ring on an outer wall, and up to the first pipe part and the second pipe part of the opening/closing key pipe, or the first inserted hollow body to the fourth insertion of the opening/closing key pipe It is filled to a hollow body, and between the third inserted hollow body and the fourth inserted hollow body of the opening and closing key pipe, the contact ring is confined between the step of the inner wall and the movement prevention stopper, the opening and closing key pipe of the By pressing the first tube portion, the movement preventing stopper and the contact ring may be constrained to the second inserted hollow body and the third hollow body.

The expansion and contraction pipe consists of a bellows pipe, a braid pipe surrounding the bellows pipe, and band rings located at both ends of the braid pipe, and from the both ends of the braid pipe toward both sides of the braid pipe Extending the bellows pipe, inserting the bellows pipe into the rotation reference shaft pipe and the reducer, and fixing the bellows pipe to the rotation reference shaft pipe and the reducer by welding, the bellows pipe, the band ring It is expanded from the inside of the can be in close contact with the braid tube to the band ring.

The expansion and contraction pipe includes a bellows pipe, a fitting pipe surrounding both ends of the bellows pipe, a braid pipe surrounding the bellows pipe and the fitting pipe, and a braid pipe that is located at both ends of the braid pipe and is one-to-one with the fitting pipe and a corresponding band ring, facing the rotation reference shaft pipe and the reducer at individual sides of the bellows pipe or the braid pipe, and the bellows pipe and the fitting pipe and the rotation reference shaft pipe and the reducer The braid tube and the band ring may be fixed by welding, the bellows tube may be fixed in close contact with the fitting tube, and the braid tube may be fixed in close contact with the fitting tube and the band ring.

The expansion and contraction pipe fitting according to the present invention is located between the sprinkler head and the transverse pipe and includes a reducer, an expansion pipe, a rotation reference shaft pipe, an opening/closing key pipe, and an opening/closing lock valve from the sprinkler head toward the transverse pipe, the bellows pipe of the expansion pipe The reducer and the rotation reference shaft pipe are fixed at both ends of the expansion and contraction pipe by welding, and the rotation reference shaft pipe is inserted into the opening/closing key pipe to rotate the opening/closing key pipe relative to the rotation reference shaft pipe, and the opening/closing key pipe Since the on/off lock valve is opened or closed when the on/off lock valve is inserted into the on/off lock valve or separated from the on/off lock valve, it is applied regardless of the ceiling structure even if the on/off lock valve is fixed to the transverse pipe by welding to prevent distortion of expansion and contraction piping and fire protection. It is possible to facilitate separation from the transverse pipe while blocking the supply of water from the transverse pipe in the event of a breakdown of the high-pressure piping facility.

The expansion and contraction pipe fitting according to the present invention includes a reducer positioned between a sprinkler head and a transverse pipe, an expansion pipe, a rotation reference shaft pipe, an opening/closing key pipe, and an opening/closing lock valve, and inserting the rotation reference shaft pipe into the opening/closing key pipe. By rotating the on/off key pipe relative to the rotation reference shaft pipe, and opening or closing the on/off lock valve when the on/off key pipe is inserted into or disconnected from the on/off lock valve, welded or threaded or grooved Even if a de-coupler is used to connect the transverse pipe and the opening/closing lock valve, it is applied regardless of the ceiling structure to prevent distortion of the new pipe and to facilitate separation from the transverse pipe while blocking the water supply from the transverse pipe in case of a failure of the firefighting high-pressure piping system. .

1 is a perspective view showing an expansion pipe fitting according to the present invention.
FIG. 2 is a cross-sectional view showing the inside of the opening/closing lock valve in the expansion and contraction pipe fitting of FIG. 1 in detail.
FIG. 3 is a cross-sectional view showing the interior of the lower body and the upper body in detail in the opening/closing lock valve of FIG. 2 .
FIG. 4A is an image showing a first modified example of the upper body on the lower body of FIG. 3 .
Fig. 4b is a side view showing a second modification of the upper body on the lower body of Fig. 3;
Figure 4c is a perspective view showing a waterproof ring between the lower body and the upper body of Figure 3;
5 is a cross-sectional view (= left side view, front view and right side view) showing the upper body of FIG. 3 .
6 is a cross-sectional view (= front view and rear view) showing in detail the opening/closing lock of the opening/closing lock valve of FIG. 2 .
Figure 7a is a perspective view showing the key support in the opening and closing lock of Figure 6;
Figure 7b is a perspective view showing the buffer pad in the opening and closing lock of Figure 6;
Figure 7c is a perspective view showing the channel opening and closing pad in the opening and closing lock of Figure 6;
FIG. 7D is a front view showing a top-shaped core in the opening/closing lock of FIG. 6 ;
8 is a cross-sectional view showing the compression state of the spring in the opening/closing lock by inserting an opening/closing key pipe into the opening/closing lock valve of FIG.
9A is a front view showing the exterior of the opening/closing key pipe of FIG. 8 .
9B is a cross-sectional view showing the inside of the opening/closing key pipe of FIG. 8 .
10A is a cross-sectional view showing a coupling state of the opening/closing key pipe and the rotation reference shaft pipe of FIG. 1 .
10B is an exploded view showing an opening/closing key pipe and a rotation reference shaft pipe of FIG. 10A.
11 is an exploded view showing the expansion and contraction piping and the reducer of FIG.
12 is a side view showing a modified example of the expansion and contraction pipe of FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The detailed description of the present invention set forth below refers to the accompanying drawings, which show by way of illustration specific embodiments in which the present invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the present invention. It should be understood that various embodiments of the present invention are different but need not be mutually exclusive. For example, certain shapes, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the invention in relation to one embodiment. In addition, it should be understood that the location or arrangement of individual components within each disclosed embodiment may be changed without departing from the spirit and scope of the present invention. Accordingly, the detailed description set forth below is not intended to be taken in a limiting sense, and the scope of the present invention, if properly described, is limited only by the appended claims, along with all scope equivalents as those claimed. In the drawings, like reference numerals refer to the same or similar functions in various aspects, and the length, area, thickness, and the like may be exaggerated for convenience.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art can easily practice the present invention.

1 is a perspective view showing an expansion pipe fitting according to the present invention, FIG. 2 is a cross-sectional view showing the inside of the on/off lock valve in the expansion pipe fitting of FIG. 1 in detail, and FIG. 3 is a lower body and It is a cross-sectional view showing the inside of the upper body in detail.

FIG. 4A is an image showing a first modified example of the upper body on the lower body of FIG. 3 , FIG. 4B is a side view showing a second modified example of the upper body on the lower body of FIG. 3 , and FIG. 4C is an image of FIG. 3 . It is a perspective view showing the waterproof ring between the lower body and the upper body.

5 is a cross-sectional view showing the upper body of FIG. 3 (= left side view, front view and right side view), and FIG. 6 is a cross-sectional view (= front view and rear view) showing in detail the opening and closing lock of the opening/closing lock valve of FIG. , FIG. 7A is a perspective view showing a key support in the opening and closing lock of FIG. 6 .

Fig. 7b is a perspective view showing the buffer pad in the opening/closing lock of Fig. 6, Fig. 7c is a perspective view showing the waterway opening/closing pad in the opening/closing lock of Fig. 6, and Fig. 7d is a front view showing the top-shaped core in the opening/closing lock of Fig. 6; 8 is a cross-sectional view showing the compression state of the spring in the opening/closing lock by inserting an opening/closing key pipe into the opening/closing lock valve of FIG.

9A is a front view showing the exterior of the opening/closing key pipe of FIG. 8, FIG. 9B is a cross-sectional view showing the inside of the opening/closing key pipe of FIG. 8, and FIG. 10A is the coupling state of the opening/closing key pipe of FIG. It is a cross-sectional view showing, and FIG. 10B is an exploded view showing the opening/closing key pipe and the rotation reference shaft pipe of FIG. 10A.

In addition, FIG. 11 is an exploded view showing the expansion and contraction piping and the reducer of FIG. 1 , and FIG. 12 is a side view showing a modified example of the expansion and contraction piping of FIG. 11 .

Referring to FIG. 1 , the expansion and contraction pipe fitting 320 is located between a branch pipe branching from a lateral pipe (not shown in the drawing) of a building and a sprinkler head (not shown in the drawing) exposed from the ceiling of the building. Schematically, the expansion pipe fitting 320 includes an opening/closing lock valve 220 , an opening/closing key pipe 250 , a rotation reference shaft pipe 270 , and an expansion pipe 300 . and a reducer 310 .

The opening/closing lock valve 220 is connected to the branch pipe to control the flow of firefighting water supplied from the branch pipe. The opening/closing key pipe 250 is connected to the opening/closing lock valve 220 to open the opening/closing lock valve 220 . The rotation reference shaft pipe 270 is connected to the opening/closing key pipe 250 to relatively rotate the opening/closing lock valve 220 and the opening/closing key pipe 250 .

The expansion and contraction pipe 300 is fixedly connected to the rotation reference shaft pipe 280 . The reducer 310 is fixedly connected to the expansion pipe 300 and the sprinkler head between the expansion pipe 300 and the sprinkler head. Here, when the opening/closing lock valve 220 and the opening/closing key pipe 250 are sequentially connected to the branch pipe, distortion of the expansion and contraction pipe 300 is excluded relative to the branch pipe or the sprinkler head.

Referring back to FIGS. 2 to 12 together with FIG. 1 , when the expansion and contraction pipe fitting 320 is viewed in detail, the opening/closing lock valve 220 is, as shown in FIGS. 2 and 3 , sequentially It includes a lower body 40 and an upper body 106 that are stacked, and an opening/closing lock 210 surrounded by the lower body 40 and the upper body 106 . The lower body 40 and the upper body 106 have a lower hollow 20 and an upper hollow 50. 90, respectively.

In addition, the lower body 40 and the upper body 106, as shown in FIGS. 2 and 3, communicate through the lower hollow 20 and the upper hollow (50. 90), the lower body (40) and a watertight ring ( 108 in FIG. 4C ) between the upper body 106 and the upper body 106 . The lower body 40, as shown in FIG. 3, has a balcony 34 protruding from the lower outer wall along the lower outer wall when viewed from the outside, and the upper body 106 from the balcony 34 support

In addition, the lower body 40 has a first lower inner wall and a second lower inner wall that are sequentially stacked to surround the lower hollow 20 when viewed internally, and the length of the opening/closing lock valve 220 is along the direction it has a smaller length than the upper body 106 . Here, as shown in FIG. 3 , the first lower inner wall is narrowed in multiple stages toward the second lower inner wall and taper toward the center of the lower body.

The second lower inner wall is located vertically on the veranda 38 extending closer to the balcony 34 compared to the first lower inner wall along the radial direction of the lower body 40, as shown in FIG. 3 . . Accordingly, the first lower inner wall is located below the veranda 38 , and the second lower inner wall is located above the veranda 38 .

As shown in FIG. 3, the upper body 106 is supported on the balcony 34 of the lower body 40 when viewed from the outside and tapers in multiple stages from the lower body 40 toward the branch pipe. and has a first upper inner wall and a second upper inner wall that are sequentially stacked so as to surround the upper hollow 50. 90 when viewed from the inside.

The first upper inner wall surrounds the first upper hollow 50 among the upper hollows 50 and 90 , and the outer wall of the lower body 40 is exposed on the balcony 34 of the lower body 40 . And the screw (refer to 35 & 55 in Fig. 4a) is coupled, and is integrally formed with the triangular stator blade 70 at the uppermost level. The second upper inner wall surrounds the second upper hollow 90 having a smaller diameter than the first upper hollow 50 , and exposes the triangular stator blade 70 to the branch pipe.

Here, the triangular stator blade 70, on the first upper inner wall, divides the first upper hollow 50 into thirds 80 as shown in FIGS. 3 and 5 , and penetrates through the center of the triangular stator blade 70 . It has a hole (60). Also, the upper body 106 may be transformed into the upper body 106A of FIG. 4A and the upper body 106B of FIG. 4B .

Preferably, the upper body 106 has a chamfered shape 101 at the end of the upper body 106 in contact with the branch pipe when it is welded to the branch pipe, as shown in FIG. 2 or FIG. 3 . Alternatively, the upper body 106A may have a female or male thread (refer to 103 of FIG. 4A ) opposite to that of the branch pipe in the upper body 106A contacting the branch pipe when threadedly coupled to the branch pipe. there is.

Unlike this, the upper body 106B, when coupled to the branch pipe through a grooved coupler (not shown in the drawing), forms an externally symmetrical shape with the branch pipe, the upper body in contact with the branch pipe At 106B, it may have an engaging groove (105 in FIG. 4B).

The opening/closing lock 210, as shown in FIGS. 2 and 6 and 8, elastically moves in the lower body 40 and the upper body 106, while the triangular fixed wing 70 of the upper body 106 is In order to pass through, from the lower body 40 toward the upper body 106, the nut 110, the key support 130, the washer (not shown), the buffer pad 150, and the waterway opening/closing pad 170 and It includes a top-shaped core 190 and a spring 200 .

The channel opening/closing pad 170 has a larger diameter than the buffer pad 150 and the washer. The washer is positioned between the key rest 130 and the cushioning pad 150 and is not shown in FIG. 6 . The top-shaped core 190 has a larger diameter of the upper shaft 189 positioned above the disk 186 than the lower shaft 183 positioned below the circular disk 186, as shown in FIG. 7D . have

The top-shaped core 190 is located at the center of the triangular stator blade 70 of the upper body 106 surrounded by the spring 200 at the upper shaft 189 when considering FIGS. 2 and 6 and 7D. It passes through the through hole 60 that is used, and sequentially passes through the waterway opening/closing pad 170, the buffer pad 150, the washer, and the key rest 130 on the lower shaft 183 through M2 (male thread) of FIG. 7d. The female thread of the nut 110 and the thread are coupled.

The top-shaped core 190 retracts the upper shaft 189 from the triangular stator blade 70 when the spring 200 is expanded (not shown in the drawing) or when the spring 200 is compressed (refer to FIG. 2 ). Advance the upper shaft 189 towards the triangular stator blade 70 . The channel opening/closing pad 170 has the same diameter as the disk 186 as shown in FIG. 6 , and has a hole ( 165 in FIG. 7C ) in the center region.

The spring 200 is fixed to the triangular fixed wing 70 through one end and is in close contact with the disk 186 through the other end, so that the nut 110 and the key rest 130 through the expansion and compression of the spring 200 . ), the washer, the buffer pad 150, the channel opening/closing pad 170, and the top-shaped core 190 are elastically moved. Here, the buffer pad 150 has a hole (145 in FIG. 7B ) in the central region.

The key support 130 is in the shape of a chair with the backrest and the handrest excluded, and is spaced apart from the opening/closing key pipe 250 along with the four feet 123 in contact with the opening/closing key pipe 250 as shown in FIG. Includes a seat 129 for connecting the four feet (123). The seating table 129 has a hole ( 126 in FIG. 7A ) in the central region.

The seat 129 has a larger diameter than the washer, and the nut 110 is located under the seat 129 and is surrounded by four feet 123 of the seat 129 . The opening/closing key pipe 250 is divided into a first pipe part (R1), a second pipe part (R2), and a third pipe part (R3) when viewed from the outside as shown in FIG. 9A, and a second pipe part (R2) ) includes a knurling pattern 235 to improve the grip and an inclined shape that tapers and narrows toward the opening/closing lock valve 220 in the third pipe portion R2.

The opening/closing key pipe 250 is, as shown in FIG. 9b, when viewed internally, a first inserted hollow body 241 having one inner diameter in the first pipe part R1, and a first inserted hollow body ( 241), the second to fourth inserted hollow bodies 243, 245, 247, which are widened in a fallopian tube shape and tapered in a multi-stage shape, and a fourth hollow body having the same inner diameter smaller than that of the fourth inserted hollow body 247 5 insert hollow body 249 .

The third pipe part R3 is inserted into the lower body 40 of the opening/closing lock valve 220 as shown in FIG. 8 when viewed from the outside and through M3 (male thread) of FIG. 9A of the lower body 40 A female thread (M1 in FIG. 3) and a threaded connection are made. Here, the movement of the third pipe portion R3 in the lower body 40 induces a vertical movement (D in FIG. 8 ) of the opening and closing lock 210 in the lower body 40 and the upper body 106 .

More specifically, when the lower body 40 is formed of first and second lower inner walls that are sequentially stacked. The opening/closing key pipe 250 is inserted into the lower body 40 and is coupled to the lowest end (10 in FIG. 3 ) of the multi-stage shape of the first lower inner wall and the screw lines M1 and M3.

The opening/closing key pipe 250 is, as shown in FIGS. 2 and 3 and FIGS. 8 and 9A , the lowermost end (10 in FIG. 3 ) and the thread M1 of the first lower inner wall in the lower body 40 . , M3) by pushing the key pedestal 130 of the opening and closing lock 210 toward the triangular fixed wing 70 of the upper body 106 by coupling from the veranda 38 of the second lower inner wall of the opening and closing lock 210 The lower hollow 20 is opened while separating the opening/closing pad 170 through the waterway.

In addition, although not shown in the drawings, the opening/closing key pipe 250 is the lowermost end of the first lower inner wall in the lower body 40 when considering FIGS. 2 and 3 and FIGS. 8 and 9A ( FIG. 3 ). 10) of the upper body 106 by pulling the key pedestal 130 of the opening and closing lock 210 from the triangular fixed wing 70 of the upper body 106 to open and close the opening and closing lock 210 on the veranda 38 of the second inner wall While the pad 170 is seated, the lower hollow 20 is closed.

Here, when the opening/closing key pipe 250 is separated from the lowermost end (10 of FIG. 3 ) of the first lower inner wall in the lower body 40 , the spring 200 is expanded under the triangular fixed wing 70 , In the lower body 40 , the opening and closing pad 170 is more firmly attached to the veranda 38 of the second inner wall by the number of the opening and closing locks 210 .

The rotation reference shaft pipe 270, as shown in FIGS. 10A and 10B, has an outer diameter that increases in multiple steps from one side to the other side when viewed from the outside, and moves the last end positioned close to the other side with a movement preventing stopper ( 263), and having a contact ring 275 around the movement prevention stopper 263 on the other side, when viewed from the inside, the housing hollow body 266 and the other side hollow surrounding the one side hollow from one side to the other side It sequentially has a hollow body 269 surrounding the waterway.

The contact ring 275 is disposed between the opening/closing key pipe 250 and the rotation reference shaft pipe 270 inside the opening/closing key pipe 250 when the rotation reference shaft pipe 270 is inserted into the opening/closing key pipe 250 . Prevents leakage between the opening/closing key pipe 250 and the rotation reference shaft pipe 270 along with the locking, and the opening/closing key pipe 250 when the opening/closing key pipe 250 is rotated relative to the rotation reference shaft pipe 270 and the friction of the rotation reference shaft pipe 270 is minimized.

The housing hollow body 266, as shown in FIG. 1, accommodates the bellows pipe (284 in FIG. 11) protruding from the expansion and contraction pipe 300, and attaches the bellows pipe 284 to the rotation reference shaft pipe 270. fixed by welding. In more detail, the rotation reference shaft pipe 270 has a movement preventing stopper 263 and a contact ring 275 on the outer wall, as shown in FIGS. 10A and 10B, and an opening/closing key pipe 250 of the first pipe portion R1 and the second pipe portion R2 or the first inserted hollow body 241 to the fourth inserted hollow body 247 of the opening/closing key pipe 250 are filled.

In addition, the rotation reference shaft pipe 270 is between the third inserted hollow body 245 and the fourth inserted hollow body 247 of the opening/closing key pipe 250 and the step of the inner wall and the movement preventing stopper 263 . The contact ring 275 is confined to the second hollow body 243 and the third hollow body 245 by pressing and pressing the first pipe portion R1 of the opening/closing key pipe 250 to prevent movement of the stopper 263. and the contact ring 275 are constrained.

As shown in FIGS. 1 and 11 , the expansion and contraction pipe 300 is located at both ends of the bellows pipe 284 , the braid pipe 288 surrounding the bellows pipe 284 , and the braid pipe 288 . It consists of a band ring 295 that becomes a rotating reference shaft pipe 270 and a reducer 310 by extending the bellows pipe 284 from both ends of the braid pipe 288 toward both sides of the braid pipe 288. Inserting the bellows pipe 284 to, fixing the bellows pipe 284 to the rotation reference shaft pipe 270 and the reducer 310 by welding, the bellows pipe 284 is, from the inside of the band ring 295 It can be expanded to make the braid tube 288 in close contact with the band ring 295 .

The expansion pipe 300 is, when considering FIGS. 1 and 12, a bellows pipe 324, a fitting pipe 328 surrounding both ends of the bellows pipe 324, a bellows pipe 324, and a fitting The braid tube 334 surrounding the tube 328 and the band ring 338 which is located at both ends of the braid tube 334 and corresponds one-to-one with the fitting tube 328, the bellows tube 324 or the braid A bellows pipe 324 and a fitting pipe 328 are connected to the rotation reference shaft pipe 270 and the reducer 310 facing the rotation reference shaft pipe 270 and the reducer 310 on separate sides of the pipe 334 and The braid pipe 334 and the band ring 338 are fixed by welding, the bellows pipe 324 is fixed in close contact with the fitting pipe 328, and the braid pipe 334 is the fitting pipe 328 and the band ring. It can be fixed in close contact with (338).

Next, a method of using the expansion pipe fitting according to the present invention will be described with reference to FIGS. 1 and 11 .

1 and 11 , two groups of expansion and contraction pipe fittings connecting the sprinkler head and the transverse pipe may be prepared. The expansion pipe fittings of the first group include expansion pipes 300 and a reducer 310 . The second group of expansion and contraction pipe fittings includes an opening/closing lock valve 220 , an opening/closing key pipe 250 , and a rotation reference shaft pipe 270 .

In the first group of expansion pipe fittings, the expansion pipe 300 and the reducer 310 are fixed to each other by welding. In the second group of expansion and contraction pipe fittings, the opening/closing key pipe 250 is threadedly coupled to the opening/closing lock valve 220, and the rotation reference shaft pipe 270 is fitted into the opening/closing key pipe 250 to provide an opening/closing key pipe ( 250) is rotationally fixed.

Next, the expansion pipe fittings of the second group may be fixed to the expansion pipe fittings of the first group by welding. That is, the expansion and contraction pipe 300 and the rotation reference shaft pipe 270 are fixed to each other by welding. Through this, the expansion pipe fittings of the first group and the expansion pipe fittings of the second group constitute the expansion pipe fittings 320 .

Next, the reducer 310 may be fixed to the sprinkler head by welding, and the opening/closing lock valve 220 may be connected to the branch pipe of the transverse pipe by welding, threading, or a grooved coupler. The expansion and contraction pipe fitting 320 is fixed to the sprinkler head and connected to the branch pipe of the transverse pipe, and expands and contracts by the relative rotation of the opening/closing key pipe 250 and the opening/closing lock valve 220 with respect to the rotation reference shaft pipe 270 It is possible to prevent distortion of the pipe 300 .

Here, in a state in which the opening/closing lock valve 220 and the opening/closing key pipe 250 are connected, the opening/closing lock valve 220 opens the opening/closing lock valve 220 through the opening/closing lock 210 . In addition, after the expansion pipe fitting 320 is positioned between the sprinkler head and the transverse pipe, when a failure occurs in the expansion pipe fitting 320, the expansion pipe fitting 320 is an opening/closing key pipe 250 and an opening/closing lock valve ( 220 , the opening/closing key pipe 250 may be separated from the opening/closing lock valve 220 by unscrewing the screw threads M1 and M3 .

Here, in a state in which the opening/closing lock valve 220 and the opening/closing key pipe 250 are separated, the opening/closing lock valve 220 closes the opening/closing lock valve 220 through the opening/closing lock 210 . The opening/closing lock valve 220 blocks the water supply of the transverse pipe. Therefore, when a failure occurs in the expansion and contraction piping fittings 320, the failure investigation of the expansion and contraction pipe fittings 320 without draining the water supplied to the inside of the building through the transverse pipe is performed by focusing on the separated expansion and contraction pipe fittings. can be done quickly.

220; on/off lock valve, 250; open/close key piping
270; pivot shaft tubing, 284; bellows tube
300; telescopic piping, 310; reducer
320; expansion pipe fittings

Claims (23)

In the expansion pipe fittings located between the branch pipe branching from the horizontal pipe of the building and the sprinkler head exposed from the ceiling of the building,
an opening/closing lock valve connected to the branch pipe to control the flow of firefighting water supplied from the branch pipe;
an opening/closing key pipe connected to the opening/closing lock valve to open the opening/closing lock valve;
a rotation reference shaft pipe connected to the opening/closing key pipe to relatively rotate the opening/closing lock valve and the opening/closing key pipe;
an expansion and contraction pipe fixedly connected to the rotation reference shaft pipe; and
and a reducer fixedly connected to the expansion pipe and the sprinkler head between the expansion pipe and the sprinkler head,
The opening/closing lock valve and the opening/closing key pipe include:
When sequentially connected to the branch pipe, the distortion of the expansion and contraction pipe is excluded relative to the branch pipe or sprinkler head,
The opening/closing lock valve is
a lower body and an upper body sequentially stacked; and
an opening and closing lock surrounded by the lower body and the upper body;
The lower body and the upper body,
It has a lower hollow and an upper hollow, respectively, and communicates through the lower hollow and the upper hollow,
a waterproof ring between the lower body and the upper body;
The lower body is
When viewed from the outside, having a balcony projecting from the lower outer wall along and along the lower outer wall, supporting the upper body on the balcony;
When viewed internally, it has a first lower inner wall and a second lower inner wall that are sequentially stacked to surround the lower hollow,
and a length smaller than that of the upper body along the longitudinal direction of the on-off lock valve.
delete delete According to claim 1,
The first lower inner wall,
It is narrowed in multiple stages toward the second lower inner wall and taper toward the center of the lower body,
The second lower inner wall,
A telescopic pipe fitting that is vertically positioned on the veranda that extends closer to the balcony compared to the first lower inner wall along the radial direction of the lower body.
According to claim 1,
The upper body is
When viewed from the outside, it is supported on the balcony of the lower body and taper in multiple stages from the lower body toward the branch pipe,
A telescopic pipe fitting having a first upper inner wall and a second upper inner wall sequentially stacked so as to surround the upper hollow when viewed internally.
6. The method of claim 5,
The first upper inner wall,
Surrounding the first upper hollow of the upper hollow, threadedly coupled to the outer wall of the lower body exposed on the balcony of the lower body, and integrally formed with a triangular fixed wing at the uppermost level,
The second upper inner wall,
Surrounding a second upper hollow having a smaller diameter than the first upper hollow, exposing the triangular stator blade to the branch pipe,
The triangular fixed wing,
In the first upper inner wall, the first upper hollow is divided into thirds, and having a through hole in the center of the triangular stator blade, a telescopic pipe fitting.
According to claim 1,
The upper body is
When welded to the branch pipe,
or having a chamfer shape at the end of the upper body in contact with the branch pipe;
When screwed to the branch pipe,
In the upper body in contact with the branch pipe, it has a female or male thread of a type opposite to that of the branch pipe,
When coupled to the branch pipe through a grooved coupler (grooved coupler),
Expansion pipe fittings, having a coupling groove in the upper body in contact with the branch pipe to form an externally symmetrical shape with the branch pipe.
According to claim 1,
The opening and shutting lock mentioned above,
In order to pass through the triangular fixed wing of the upper body while performing elastic motion in the lower body and the upper body,
a nut, a key rest, a washer, a buffer pad, a channel opening/closing pad, a top-shaped core, and a spring from the lower body toward the upper body;
The waterway opening and closing pad,
A telescopic tubing fitting having a larger diameter than the cushioning pad and the washer.
9. The method of claim 8,
The top-shaped core,
having a larger diameter of the upper shaft positioned above the disk than the lower shaft positioned below the circular disk;
Passing through a through hole located in the center of the triangular fixed wing of the upper body surrounded by the spring on the upper shaft,
In the lower shaft, the channel opening/closing pad, the buffer pad, the washer, and the key pedestal sequentially penetrate through the nut and the screw threaded fitting.
10. The method of claim 9,
The top-shaped core,
Retracting the upper shaft from the triangular stator wing when the spring is expanded or advancing the upper shaft toward the triangular stator wing when the spring is compressed,
The waterway opening and closing pad,
A telescopic tubing fitting having the same diameter as the disk.
9. The method of claim 8,
The spring is
The nut, the key support, the washer, the buffer pad, the channel opening/closing pad, and the top-shaped core are fixed to the triangular fixed wing through one end and are in close contact with the disk through the other end through expansion and compression of the spring. elastic movement, expansion tubing fittings.
9. The method of claim 8,
The key pedestal is
In a chair shape in which a backrest and a handrest are excluded, it includes four feet in contact with the opening/closing key pipe, and a resting base for connecting the four legs apart from the opening/closing key pipe,
The mounting base,
having a larger diameter than the washer,
The nut is
a telescoping tubing fitting positioned below the seat and surrounded by the four feet.
According to claim 1,
The opening and closing key pipe,
When viewed from the outside, the first pipe part, the second pipe part, and the third pipe part are divided into a knurling pattern to improve the grip in the second pipe part, and the inclination that tapers and narrows toward the opening/closing lock valve from the third pipe part including shape;
When viewed internally, the first inserted hollow body having one inner diameter in the first tube portion, and the second to fourth inserted hollow bodies that open from the first inserted hollow body in the shape of a fallopian tube and taper in a multi-stage shape, and , Expansion tubing fittings comprising a fifth hollow inserted body having the same inner diameter of a size smaller than that of the fourth inserted hollow body.
14. The method of claim 13,
The third pipe part,
From an external point of view,
A telescopic pipe fitting that is inserted into the lower body of the opening/closing lock valve and threadedly coupled to the lower body.
According to claim 1,
When the lower body consists of first and second lower inner walls sequentially stacked.
The opening and closing key pipe,
A telescopic pipe fitting that is inserted into the lower body and threadedly coupled to the lowermost end of the multi-stage shape of the first lower inner wall.
16. The method of claim 15,
The opening and closing key pipe,
While separating the opening and closing pad with the number of opening and closing locks from the veranda of the second lower inner wall by pushing the key support of the opening and closing lock toward the triangular fixed wing of the upper body by screwing with the lowest end of the first lower inner wall A telescopic pipe fitting that opens the lower hollow.
16. The method of claim 15,
The opening and closing key pipe,
When separating from the lowermost end of the first lower inner wall, pull the key support of the opening and closing lock from the triangular fixed wing of the upper body to seat the opening and closing pad with the number of opening and closing locks on the veranda of the second inner wall while seating the lower hollow sealing, expansion tubing fittings.
According to claim 1,
The rotation reference shaft pipe,
When viewed from the outside, it has an outer diameter that increases in multiple steps from one side to the other side and sets the last end positioned near the other side as a movement prevention stopper, and has a contact ring around the movement prevention stopper on the other side,
When viewed from the inside, the expansion pipe fitting sequentially has a housing hollow body surrounding the hollow on one side from the one side toward the other side and a hollow body with a water channel surrounding the hollow on the other side.
19. The method of claim 18,
The contact ring is
When the rotation reference shaft pipe is inserted into the opening/closing key pipe, it is confined between the opening/closing key pipe and the rotation reference shaft pipe inside the opening/closing key pipe, and leakage between the opening/closing key pipe and the rotation reference shaft pipe prevent,
An expansion and contraction pipe fitting for minimizing friction between the opening/closing key pipe and the rotation reference shaft pipe when the opening/closing key pipe is rotated relative to the rotation reference shaft pipe.
19. The method of claim 18,
The housing hollow body,
An expansion pipe fitting for receiving the bellows pipe protruding from the expansion pipe and fixing the bellows pipe to the rotation reference shaft pipe by welding.
14. The method of claim 13,
The rotation reference shaft pipe,
It has a stopper and a contact ring to prevent movement on the outer wall,
It is filled up to the first pipe part and the second pipe part of the opening/closing key pipe or the first inserted hollow body to the fourth inserted hollow body of the opening/closing key pipe;
Containing the contact ring between the step of the inner wall and the movement preventing stopper between the third inserted hollow body and the fourth inserted hollow body of the opening and closing key pipe,
An expansion and contraction pipe fitting for constraining the movement prevention stopper and the contact ring to the second inserted hollow body and the third hollow body by pressing the first pipe portion of the opening/closing key pipe.
According to claim 1,
The expansion pipe is
It consists of a bellows tube, a braid tube surrounding the bellows tube, and a band ring positioned at both ends of the braid tube,
Extending the bellows tube from both ends of the braid tube toward both sides of the braid tube and inserting the bellows tube into the rotation reference shaft tube and the reducer,
Fixing the bellows pipe to the rotation reference shaft pipe and the reducer by welding,
The bellows tube is
Expansion pipe fittings, which are expanded from the inside of the band ring to adhere the braid pipe to the band ring.
According to claim 1,
The expansion pipe is
A bellows pipe, a fitting pipe surrounding both ends of the bellows pipe, a braid pipe surrounding the bellows pipe and the fitting pipe, and a band ring positioned at both ends of the braid pipe and corresponding to the fitting pipe one-to-one is made,
Welding the bellows tube, the fitting tube, the braid tube and the band ring to the rotation reference shaft tube and the reducer facing the rotation reference shaft tube and the reducer at separate sides of the bellows tube or the braid tube fixed with
The bellows tube is
It is fixed in close contact with the fitting tube,
The braid tube,
A telescopic pipe fitting that is tightly fixed to the fitting tube and the band ring.

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