KR101993806B1 - Flecxible Branch Joint Pipe with Stable Joint and Prevention of Bending by Eccentricity - Google Patents

Abstract

The present invention relates to a flexible joint ensuring stable coupling and preventing bending caused by eccentricity. A flexible joint for allowing a sprinkler head (C) to be installed in a CPVC branch pipe (B) for a sprinkler of the present invention comprises: a corrugated pipe; a joint socket having one side inserted and coupled to an end of the corrugated pipe and the other side coupled to the CPVC branch pipe to connect the corrugated pipe and the CPVC branch pipe and prevent bending of the corrugated pipe caused by leakage and eccentricity; a reducing elbow; a flare nut; and a fixing bracket. The joint socket consists of a socket, two O-rings, and a fixing insert. The joint socket and the corrugated pipe are joined by a slip joint in which two O-rings prevent leakage and the joint socket and the CPVC branch pipe are bonded by an adhesive. Since the joint socket is composed of the socket, the O-rings, and the fixing insert, the corrugated pipe and the CPVC branch pipe can be stably connected and eccentric bending is prevented by the fixing insert.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a flexible pipe joint,

More particularly, the joint socket is composed of a socket, an O-ring, and a fixed insert to stably connect the corrugated pipe and the CPVC branch pipe, and the eccentric pipe is secured to the eccentric And a fixing bracket for fixing the flare nut and the expansion and contraction pipe to the reduction pipe and connecting the reduction pipe to the reduction pipe and the reduction pipe. The present invention also relates to a flexible pipe that prevents buckling due to eccentricity.

SPRINKLER is a sprinkling device that disperses and distributes the supplied water. It is installed in the inside of the building and is used to turn off the fire by spraying water when a fire occurs.

As described above, when the sprinkler is applied to automatically spray water when a fire occurs, it is general that each room divided into each floor of the building is installed on the ceiling.

In installing the sprinkler, a main water supply pipe for supplying water to the inside of the ceiling is provided, and a plurality of branch water supply pipes are connected to the main water supply pipe, so that the sprinkler is installed on the end side.

In this case, the main water supply pipe and the branch water supply pipe are mainly formed of a metal material, respectively, in order to achieve the desired purpose without being damaged or damaged by the high heat generated in the fire and the secondary pressure. to be.

Further, when connecting the main water supply pipe and the branch water supply pipe, an electric welding method capable of quickly joining the connection portions and making the connection particularly strong is mainly used.

That is, in order to perform the work efficiently and easily even in a relatively narrow space of the ceiling, one of the positive electrodes of the AC power supply and the DC power supply is connected to the base material of the main water supply pipe and the branch water supply pipe respectively, A method of fusing a welding material (welding rod) and a base material by melting and fusing a metal to form a weld metal and bonding the base material with each other is mainly used.

However, the conventional method of installing the main water supply pipe and the branch water supply pipes has the following problems.

That is, when the main water supply pipe and the plurality of branch water supply pipes are installed in the ceiling of the building, a lot of welding work is required at the connection part of the main water supply pipe and the branch water supply pipes. In this case, When the flexible joint is connected to a flexible tube, which forms a tube with a relatively thin plate material, the flexible joint ruptures due to impact and spark at the time of energization.

Therefore, if the flexible joint is broken due to carelessness of the operator, it must be replaced with another one. In this case, the cost of the equipment has increased due to the delay of the unnecessary working time and the input of labor costs.

Generally, various fire suppression devices are being developed and used to effectively and efficiently extinguish a fire when a building is in a high-rise and large-sized fire. As a result, a new fire suppression device gradually becomes practical and popularized, and a sprinkler capable of suppressing a fire is installed in a building because the high pressure water is sprayed on the ceiling of each floor of the building.

In order to install the sprinkler, a main water supply pipe for supplying water to the inside of the ceiling is provided, and a sprinkler is connected to the main water supply pipe for connecting a plurality of branched water supply pipes, And to suppress the fire.

Meanwhile, a flexible joint, which is made of a metal material and flexibly bent to connect the branch water supply pipe and the sprinkler to supply water, has been recently used.

As described above, the flexible joint is wrinkled in a spiral shape so as to be flexibly bent.

In addition, at one end of the flexible joint, there is a connection pipe called a reducer, to which the sprinkler head is fixed, and a fixing device is used to fix the reducer. This fixture serves to hold the reducer firmly.

As a result of the above problems, there has been an increase in participation of piping material manufacturers due to the interest in CPVC piping for fire fighting in the piping industry.

Some companies have earned KFI certification and have entered the market, and other companies are moving to enter the market.

The fire pipe market is estimated at around 160 billion won. Among them, CPVC's share is about 10 billion won, but it is expected to increase to 400 ~ 50 billion won a few years later.

Since the existing flexible joints have different materials in the CPVC piping for fire fighting, problems are caused in the coupling, and therefore, the present invention has been devised in order to cope with this problem.

In addition, when the sprinkler head is installed, height adjustment is not smooth and it is difficult to keep the head perpendicular to the ground.

In addition, there is a problem that stable coupling is difficult at the joint socket portion and warping occurs due to eccentricity.

In the multipurpose expansion and contraction pipe and its manufacturing method disclosed in Japanese Patent No. 10-1340284, the expansion and contraction pipe has a complicated structure, the stability of the fixing ring is deteriorated, and the assembly and disassembly of the expansion pipe and the adapter are difficult. Although the material can be used, there is a problem that the joining method should be a screw joint and the joining agent can not be joined.

The flexible joint for a sprinkler disclosed in the registered utility model room 0118091 has a corrugated tube formed by bending a spiral shape between straight tubes formed at both ends and being deformable in shape; And a connecting connection portion formed by providing a coupling nut on the straight tube. There is a problem in that an insulation part is provided by inserting an insulating coating layer on the outer circumferential surface of the bellows by fixing means but it can not cope with the CPVC main tube and another adapter is used.

A stretch piping for CPVC bonding of a branch piping equipped with a fixed bracket moving device disclosed in Patent Publication No. 10-1682920 has a telescopic pipe for canceling the convenience of piping work and the stress generated in the piping; An adapter coupled to one end of the expansion and contraction pipe and coupling the branch pipe to the expansion and contraction pipe; A pair of resilient elbows coupled to the sprinkler head for converting the flow of water from horizontal to vertical and allowing the sprinkler head to be installed vertically; A flare nut coupled to the other end of the extensible pipe to engage with the reducing elbow; And a spring fixed to the sprinkler head to support the load received by the reducing elbow, to adjust the height of the sprinkler head smoothly, to prevent the reduction nozzle from being pushed by the pipe during installation, Bracket, which is similar to the present invention, but there is a problem with the adapter, so that a stable coupling can not be achieved, and a problem arises in that it is bent when receiving eccentricity.

1. Korean Registered Patent No. 10-1682920 (Registered: Nov. 30, 2016) Stretch piping for CPVC bonding of branch piping with fixed bracket moving device 2. Korean Patent Registration No. 10-1340284 (Registered on December 02, 2013) Multipurpose expansion and contraction piping and manufacturing method thereof 2. Korea Registered Utility Model Office 0118091 (Registered on December 24, 1997) Flexible joint for sprinkler 3. Korean Utility Model Registration Bulletin 20-0378271 (Registered: March 02, 2005) New Spray Pipes for Sprinkler 4. A flexible tube for a sprinkler (for piping, etc.) for a sprinkler, which is disclosed in Korean Patent Publication No. 1997-0070683 (Published on November 07, 1997)

In order to solve the above-mentioned problems, the present invention is to solve the above-mentioned problems, and it is an object of the present invention to provide a corrugated pipe for canceling stress generated in piping, convenience of piping work, and bending due to stable coupling and eccentricity, And a fixed insert; a regulating elbow for vertically changing the direction of water for installing the sprinkler head; a flare nut for coupling the corrugated pipe and the reducing elbow; and a fixing bracket for fixing the expansion pipe To prevent stabile coupling and bending due to eccentricity.

The expansion and contraction pipe of the present invention comprises: a corrugated pipe for facilitating piping work and offsetting stress generated in the piping; A joint socket inserted into one end of the bellows pipe and coupled to the CPVC bell pipe to stably connect the bell pipe to the CPVC bell pipe and to prevent bending due to leakage and eccentricity; One end coupled to the sprinkler head and having a downward elbow for converting the flow of water from horizontal to vertical and allowing the sprinkler head to be installed vertically; A flare nut, one side of which is engaged with the reducing elbow and the other side of which is coupled to the bellows pipe to couple the bellows with the reducing bellows; And a spring fixed to the sprinkler head to support the load received by the reducing elbow, to adjust the height of the sprinkler head smoothly, to prevent the reduction nozzle from being pushed by the pipe during installation, Bracket.

The joint socket and the corrugated pipe are joined by a slip joint in which two O-rings are prevented from leakage, and the joint socket and the CPVC branch pipe are bonded together by an adhesive.

The corrugated pipe is made of stainless steel, and a corrugated portion is formed to facilitate the piping work and to eliminate the stress generated in the piping, except for a certain length of both ends.

Each of the flow preventing portions inflating the corrugated tube to prevent the joint socket and the rear nail from being stably fixed and flowing into the inside of the corrugated pipe, The terminal block is formed at both ends of the flow preventive portion at predetermined intervals and prevents the joint socket and the rear nut from coming off to both ends.

 The socket having a socket for receiving the corrugated pipe at one end and inserting the CPVC branch pipe at the other end to connect the corrugated pipe to the CPVC branch pipe; Two O-rings fitted in the bellows tube and installed inside the socket to maintain airtightness between the socket and the bellows tube to prevent leakage; A fixed insert inserted in the inner surface of the socket to assist stable engagement with the CPVC pipe and to fix the position of the O-ring so as not to be pushed, to prevent bending due to eccentricity and to limit the insertion depth of the CPVC branch pipe do.

The stationary insert-engaging portion and the stationary insert in the socket are formed in a wedge shape of a concave-convex type to increase the degree of coupling.

The socket is made of the same CPVC (Chlorinated Polyvinyl Chloride) material as the CPVC branch pipe to increase the adhesive strength when adhering with the adhesive, and the fixed insert is PE which is softer than the CPVC so that the socket can be easily coupled with the socket.

The socket includes a corrugated pipe coupling portion into which the corrugated pipe is inserted; A fixed insert engaging portion connected to one end of the bellows pipe coupling portion and engaged with the fixed insert;

And a branch piping coupling portion formed continuously from one end of the fixed insert coupling portion and having the same outer diameter as the fixed insert coupling portion and having the CPVC branch pipe inserted therein.

Inside the fixed insert, an insert hollow portion is formed to be a passage through which fire water flows. The outer diameter of the fixed insert is formed with an insert concave portion to be engaged with the fixed insert engagement portion.

The corrugated pipe joint portion is formed with a corrugated pipe work which is a passage through which the corrugated pipe is inserted and a water flow passage.

The insert insert having a through hole formed therein and having a socket bulging portion and a passage through which water flows; And an insert engaging concave portion formed on the inner diameter of the insert in the insert to engage the fixed insert.

A plurality of slip prevention protrusions are formed on the outer side of the fixed insert coupling portion to prevent the sliding socket from being slid when handed.

In the branch piping coupling portion, a CPVC branch pipe is inserted, adhered with an adhesive, and a branch pipe pipe which becomes a passage through which the fire water flows, is formed.

The above-mentioned corrugated pipe, the insert, and the branch pipe have different diameters of the corrugated pipe and the CPVC branch pipe, and the inner diameter of the hollow for forming the socket bulging portion formed in the corrugated pipe.

Four insert jigs are provided at one end of the insert hollow to provide a jig for coupling the insert to the socket. The insert protrusions have a plurality of insert protrusions at regular intervals.

And the upper portion is a curved surface having a certain radius of curvature, and the side surface and the upper surface are connected to each other by the insert- A linear protrusion contacting the concave / convex portion; And a wedge protrusion formed on the linear protruding portion and having both sides inclined at a predetermined angle to facilitate insertion when inserted into the concave-convex portion of the insert-concave-convex portion.

The insert-engaging concave-convex portion has the same concavity and convexity as the number of the insert-convex portion.

The above-described expansion and contraction pipe can solve the problem to be solved by the present invention.

According to the expansion and contraction pipe of the present invention, the joint socket is composed of the socket, the O-ring and the fixed insert, the corrugated tube prevents the corrugated tube from being bent by the stable connection and eccentricity of the socket and the fixed insert, The socket is made of the same material as the CPVC branch pipe, so it is easy to connect with the adhesive but it can be tightly connected. There is a fixing bracket to prevent the pushing down of the reducing elbow, so that the sprinkler head can be kept vertical This has the effect of improving the reliability and durability of the fire extinguishing piping.

Fig. 1 is a cross-sectional view of an overall front view and a front view of a stretch piping according to the present invention for preventing stable engagement and bending due to eccentricity
Fig. 2 is a perspective view showing the entire assembled perspective view of the stretch piping according to the present invention, which prevents stabile coupling and bending due to eccentricity.
Fig. 3 is an exploded perspective view of the expansion and contraction pipe according to the present invention for preventing stable engagement and warping due to eccentricity
FIG. 4 is a cross-sectional view of a corrugated pipe and a CPVC branch pipe joined together by a joint socket according to a stretch piping according to an embodiment of the present invention for preventing stable bending and bending due to eccentricity
5 is a schematic view of a corrugated pipe of a telescopic pipe for preventing stable engagement and bending due to eccentricity of the present invention
Fig. 6 is a perspective view showing a joint socket assembly and an exploded perspective view of a telescopic pipe for preventing stable coupling and bending due to eccentricity according to the present invention.
7 is a perspective view of a socket according to a joint socket of a telescopic pipe for preventing stable coupling and bending due to eccentricity according to the present invention.
8 is a cross-sectional perspective view of a socket according to a joint socket of a telescopic pipe for preventing stable engagement and bending due to eccentricity according to the present invention.
9 is a schematic view of a socket according to a joint socket of a telescopic pipe for preventing stable engagement and bending due to eccentricity of the present invention
10 is a perspective view of a fixed insert according to the present invention, which is a joint socket of a telescopic pipe for preventing stable engagement and bending due to eccentricity.
11 is a schematic view of a fixed insert according to a joint socket of a telescopic pipe for preventing stable engagement and bending due to eccentricity of the present invention
12 is a schematic view of an insert projection according to a fixed insert of a telescopic pipe for preventing stable engagement and bending due to eccentricity of the present invention
Fig. 13 is a schematic view of a flare nut according to the present invention, which is a stretch piping for preventing stable engagement and bending due to eccentricity
Fig. 14 is a schematic view of a nut body according to a flared nut of a telescopic pipe for preventing stable engagement and bending due to eccentricity of the present invention
15 is a schematic view of an insulation ring according to a flare nut of a telescopic pipe for preventing stable coupling and bending due to eccentricity of the present invention
Fig. 16 is a perspective view of a reducing-elbow oblique view of a stretch piping according to the present invention for preventing stable engagement and bending due to eccentricity.
Fig. 17 is a schematic view of a reduction engraved elbow according to the present invention of a stretch piping for preventing stable engagement and bending due to eccentricity
Fig. 18 is a schematic view of a fixing bracket according to the present invention, which is a stretch piping for preventing stable engagement and warping due to eccentricity

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

In the following description, the term " stable engagement " and " eccentricity " The present invention is not limited to the above-described embodiments.

Hereinafter, a preferred embodiment of the "expansion joint pipe for preventing stiff coupling and warping due to eccentricity" according to the present invention will be described in detail.

The following examples are merely illustrative of the present invention and are not intended to limit the scope of the present invention.

FIG. 1 is a cross-sectional view of an entire front view and a front view of a stretch pipe according to the present invention for preventing stable engagement and warping due to eccentricity. FIG. 2 is a cross- FIG. 3 is an exploded perspective view of a telescopic pipe according to an embodiment of the present invention. FIG. 4 is a perspective view of a telescopic pipe according to an embodiment of the present invention, 5 is a schematic view of a corrugated pipe of a telescopic pipe for preventing stable coupling and bending due to eccentricity according to the present invention. FIG. 6 is a schematic view of a corrugated pipe FIG. 7 is a perspective view showing a joint and a disassembled perspective view of a joint pipe of a stretch / FIG. 8 is a perspective view showing a socket according to the present invention, and FIG. 9 is a perspective view showing a socket according to an embodiment of the present invention, FIG. 10 is a perspective view of a fixed insert according to the present invention, which is a joint socket of a telescopic pipe for preventing stable coupling and bending due to an eccentricity, FIG. 11 is a perspective view of a stationary insert according to the present invention, Fig. 12 is a schematic view of an insert projection according to the fixed insert of the expansion and contraction pipe for preventing the stable engagement and bending due to the eccentricity of the present invention, and Fig. 13 is a cross- Fig. 14 is a schematic view of a flare nut according to the present invention of a stretch piping for preventing stable engagement and bending due to eccentricity. Fig. Fig. 15 is a schematic view of an insulation ring according to a flare nut of a telescopic pipe for preventing the stable coupling and bending due to an eccentricity of the present invention, and Fig. FIG. 16 is a perspective view of a reducing joint according to an embodiment of the present invention, FIG. 17 is a perspective view of a reduction joint according to an embodiment of the present invention, And Fig. 18 is a schematic view of a fixing bracket according to the present invention, which is a stretch piping for preventing stable coupling and bending due to eccentricity.

As shown in Figs. 1 to 3, the expansion and contraction pipe A of the present invention allows the sprinkler head C to be installed on the CPVC branch pipe B for the sprinkler, A corrugated pipe 1 which serves to cancel the stress caused by the piping, and which compensates for the convenience of the piping work and the stress generated in the piping; One end of the CPVC branch pipe 1 is connected to the CPVC branch pipe B and the other end thereof is connected to the CPVC branch pipe B to stably connect the CPVC branch pipe B with the corrugated pipe 1, A joint socket (2) for preventing bending of the corrugated pipe (1); One end connected to the sprinkler head C and having a downward elbow 4 for converting the flow of water from horizontal to vertical and allowing the sprinkler head C to be installed vertically; A flare nut 3 coupled to the reducing nozzle 4 at one side and coupled to the bell tube 1 at the other side to couple the reducing nozzle 4 to the bell tube 1; The lower end of the sprinkler head C is smoothly adjusted and the downward elbow 4 is prevented from being pushed by the piping at the time of installation, And a fixing bracket 5 that keeps the holding surface C perpendicular to the ground.

The joint socket 2 and the corrugated pipe 1 are connected to each other by a slip joint for preventing leakage of the two O-rings 22, and the joint socket 2 and the CPVC branch pipe B are connected by an adhesive Bond bond.

The corrugated pipe (1) is made of stainless steel, and the corrugated portion (11) is formed to facilitate the piping work and to eliminate the stress generated in the pipe except for a certain length of both ends.

The corrugated tube 1 is inflated to prevent the joints 2 and the rear nuts 3 from being stably fixed and flowing into the outer sides of the corrugated pipe 1 without the corrugated portions 11, Each of the flow preventing portions 12; Terminal portions 13 formed at both ends of the flow preventing portion 12 at predetermined intervals to prevent the joint socket 2 and the rear nut 3 from being pulled out toward both ends are formed.

The socket (2) has a socket (21) one end of which is inserted with the corrugated pipe (1) and the other end is inserted with the CPVC branch pipe (B) to connect the corrugated pipe (1) to the CPVC branch pipe (B); Two O-rings (22) fitted in the corrugated pipe (1) and provided inside the socket (21) to maintain airtightness between the socket (21) and the corrugated pipe (1) to prevent leakage; Is inserted into the inner surface of the socket 21 to help stable engagement with the CPVC branch pipe B and fix the position of the O-ring 22 so as not to be pushed, and the bending of the corrugated pipe 1 due to eccentricity And a fixed insert 23 for limiting the insertion depth of the CPVC branch pipe (B).

The core of the present invention is composed of the socket 21, the O-ring 22 and the fixed insert 23 with the joint socket 2 so that the corrugated pipe 1 and the CPVC branch pipe B are stably engaged The inside diameter of the fixing insert 23 and the outside diameter of the end portion of the corrugated pipe 1 are in one-to-one contact with each other to prevent the corrugated pipe 1 from being warped due to stable engagement and eccentricity, Serves to reinforce the end portion of the corrugated pipe 1. [

The flow preventing portion 12 and the terminal portion 13 are formed on the corrugated tube 1 to prevent the joint socket 2 from being pushed forward and backward, Prevent pushing forward and backward.

4 is a cross-sectional view for explaining the connection of the corrugated pipe 1 and the CPVC branch pipe B with the joint socket 2. As described above, the inner diameter of the fixed insert 23 and the inner diameter of the corrugated pipe 1 The outer diameter of the terminal portion contacts one by one to prevent stable bending and bending of the bell tube 1 due to eccentricity and the bell fixed tube 23 reinforces the end portion of the bell tube 1. [

As shown in FIG. 5, the corrugated pipe 1 is made of a stainless steel material, which is convenient for piping work and which cancels the stress generated in the piping, and the corrugated pipe 1 A corrugated portion 11 is formed which is convenient for piping work and which counteracts the stress generated in the piping.

The corrugated tube 1 is inflated to prevent the joints 2 and the rear nuts 3 from being stably fixed and flowing into the outer sides of the corrugated pipe 1 without the corrugated portions 11, Each of the flow preventing portions 12; Terminal portions 13 formed at both ends of the flow preventing portion 12 at predetermined intervals to prevent the joint socket 2 and the rear nut 3 from being pulled out toward both ends are formed.

The CPVC branch pipe (B) is inserted into the socket (21) at one end of the bell pipe (1) on the side of the CPVC branch pipe (B) The stationary insert mounting portion 14 on which the base plate 23 is mounted is formed.

The corrugated pipe 1 has a thickness of 0.3 mm or less and can form the flow preventing portion 12 and the terminal portion 13. When the corrugated pipe 1 has a thickness of 0.3 mm or more, The work of forming the terminal section 13 is not easy.

The length of the stationary insert part 12 is preferably 6 to 10 mm, which is equal to the thickness of the stationary insert 23 so that the stationary insert 23 is installed.

As shown in FIG. 6, the joint pouch 2 is inserted and coupled to one end of the bell pipe 1, and the other end is coupled with the CPVC branch pipe B to connect the bell pipe 1 and the CPVC branch pipe Thereby stably connecting the pipe B and preventing the leakage and the bending due to the eccentricity of the bell pipe 1. [

The joint socket 2 has a socket 21 for receiving the corrugated pipe 1 at one end and inserting the CPVC branch pipe B at the other end to connect the corrugated pipe 1 and the CPVC branch pipe B; Two O-rings (22) fitted in the corrugated pipe (1) and provided inside the socket (21) to maintain airtightness between the socket (21) and the corrugated pipe (1) to prevent leakage; Is inserted into the inner surface of the socket 21 to help stable engagement with the CPVC branch pipe B and fix the position of the O-ring 22 so as not to be pushed, and the bending of the corrugated pipe 1 due to eccentricity And a fixed insert 23 for limiting the insertion depth of the CPVC branch pipe (B).

The socket (21) in the exploded view of the socket (2) is cut in cross-section to show the inside.

7 to 9, the socket 21 is inserted into the bell pipe 1 at one end and inserted into the CPVC branch pipe B at the other end to connect the bell pipe 1 and the CPVC branch pipe B ).

The insert-engaging concave-convex portion 2122, which is an engagement portion of the stationary insert 23 in the socket 21, and the stationary insert 23 are formed in a wedge shape of a concave-convex type to increase the degree of coupling.

The socket 21 is made of the same CPVC (Chlorinated Polyvinyl Chloride) material as the CPVC branch pipe (B) in order to increase the adhesive strength when bonding with an adhesive.

The socket (21) includes a bell pipe coupling part (211) into which the bellows pipe (1) is inserted; A fixed insert coupling part 212 connected to one end of the bellows pipe coupling part 211 and coupled with the fixed insert 23; And a branch piping coupling portion 213 connected to one end of the fixed insert coupling portion 212 and having the same outer diameter as the fixed insert coupling portion 212 and having the CPVC branch piping B inserted therein.

The corrugated pipe coupling portion 211 is formed with a corrugated pipe 2111 into which the corrugated pipe 1 is inserted and which is a passage through which the water flows.

An insert insert 2121 in which the corrugated pipe 1 passes through the fixed insert engaging portion 212 to form a terminal portion 13 and a passage through which water flows; An insert engaging concave portion 2122 formed in the inner diameter of the insert 2121 and coupled with the stationary insert 23 is formed.

The insert engaging concave / convex portions 2122 are formed with the same concave convex portions 21221 as the insert protrusions 2321.

A plurality of non-slidable protrusions 2123 are formed on the outer side of the fixed insert coupling part 212 to prevent the coupling socket 2 from slipping when handed.

A branch piping middle portion 2131 is formed in the branch piping coupling portion 213 so that the CPVC branch piping B is inserted and adhered with an adhesive and a passage through which the fire water flows.

The corrugated pipe 2111 and the insert 2121 and the branch pipe 2131 are formed in such a manner that the outer diameter difference between the corrugated pipe 1 and the CPVC branch pipe B and the outer diameter difference between the corrugated pipe 1 and the CPVC branch pipe B, (13).

The insert-engaging concave-convex portion 2122 is composed of a plurality of engaging concavities 21221.

The protruding portion of the coupling concavity 21221 should be inclined so that the insert projection 2321 does not come off.

10 and 11, the stationary insert 23 is inserted into the inner surface of the socket 21 to form a stable connection with the CPVC branch pipe B and the position of the O-ring 22 Thereby preventing bending of the corrugated pipe 1 due to eccentricity, and restricting the insertion depth of the CPVC branch pipe (B).

An insert hollow portion 231 is formed in the fixed insert 23 to serve as a passage through which the fire water flows.

The outer circumference of the fixed insert 23 is formed with an insert concavo-convex portion 232 coupled with the fixed insert insert portion 212.

One end of the insert hollow portion 231 is formed with four jig coupling holes 233 for coupling the fixing insert 23 to the fixed insert coupling portion 212 of the socket 21.

A plurality of insert protrusions 2321 are formed at predetermined intervals in the insert recessed portion 232 so that insert grooves 2322 are formed between the insert protrusions 2321 and the insert protrusions 2321, And the insert projection 2321 is inserted into the groove portion of the coupling concave and convex portion 21221. In this case,

Preferably, the fixing insert 23 is made of polyethylene which is softer than the CPVC material so that the fixing insert 23 can be easily coupled when the socket 21 is coupled with the socket 21.

12, the insert protrusion 2321 is formed in an outer diameter of the fixed insert 23 and is inserted in the insert concave-convex portion 2122, A straight protruding portion 23211 having a curved surface having a certain radius of curvature and having a side surface and an upper surface contacting the insert engaging concave portion 2122; And a wedge protrusion 23212 which is connected to the linear protrusion 23211 and has both sides inclined at a predetermined angle to facilitate insertion when inserted into the concave and convex portions 21221 of the insert coupling concave and convex portion 2122.

The insert engaging concave portions 2122 are formed with the same concave convex portions 21221 as the number of the insert protrusions 2321 and are coupled to the insert protrusions 2321.

The core of the present invention is characterized in that the joint socket 2 is composed of the socket 21, the O-ring 22 and the fixed insert 23 so that the corrugated pipe 1 and the CPVC branch pipe B are stably engaged The inside diameter of the fixing insert 23 and the outside diameter of the end portion of the corrugated pipe 1 are in one-to-one contact with each other to prevent the corrugated pipe 1 from being warped due to stable engagement and eccentricity, Serves to reinforce the end portion of the corrugated pipe 1.

13, the rear rear nut 3 includes an insulating ring 3 for preventing dissimilar metal corrosion that may occur between the nut main body 31 and the stretch pipe 1 and the rear rear nut 3, (32), and a nut packing (33) for preventing leakage between the expansion pipe (1) and the rear nuts (3).

The nut main body 31 is preferably made of brass or iron metal.

An insulator ring sheet surface 311 to which the insulator ring 32 is bonded is formed inside the corrugated tube 1 of the nut body 31.

A PF screw 312 having a diameter of 1 inch is formed on the side of the nut main body 31 for installing the sprinkler head on the side of the reducing sheave 4 for screwing with the reduction sheath 4.

The insulating ring 32 is made of a PE material in the shape of a cylinder and has a flange-shaped protrusion (not shown) formed at one end thereof to be connected to the terminal portion 13 on the side of the flare nut 3 and the insulating ring sheet surface 311 And a bulging portion 322 bulged like the flow preventing portion 12 on the flare nut 3 side.

The nut packing 33 is preferably made of an EPDM rubber (Methylene rubber) material.

The EPDM rubber is a thermoplastic synthetic rubber which is a ternary copolymer of ethylene, propylene and diene, and unlike general synthetic rubber (SBR.SBS, NBR ..), the structure is free of butadiene component, and weather resistance is superior to general synthetic rubber, great.

The insulating ring 32 is preferably made of a PE material and has an expanded portion 322 in which the cylindrical portion is widened by the bulging when the flow preventing portion 12 is bulged to closely contact the one side of the nut bulging portion 16 The nut main body 31 is not pushed toward the wrinkle portion 11 side.

14, an insulating ring sheet surface 311 to which the insulating ring 32 is bonded and an insulating ring expanding packing insertion groove 313 (not shown) are formed in the inside of the extension pipe 1 side of the nut body 31, Is formed.

The nut main body 31 is preferably made of brass or iron metal.

Since the nut body 31 is made of brass or iron metal and the corrugated pipe 1 is made of stainless steel, it is preferable to provide the insulating ring 32 to prevent corrosion between dissimilar metals.

An insulating ring sheet surface 311 to which the insulating ring 32 is bonded and a nut packing bonding surface 313 to which the nut packing 33 is in contact are formed in the inside of the corrugated tube 1 of the nut body 31 And a PF screw 312 having a diameter of 1 inch is formed on the side of the nut main body 31 on the side of the reducing elbow 4 so as to be screwed with the reducing elbow 4.

15, the insulating ring 32 is formed in a cylindrical shape and made of a PE material. At one end of the insulating ring 32, the end portion 13 of the rear nut 3 and the insulating ring sheet surface 311 are formed, And a bulged portion 322 bulged like the flow preventing portion 12 on the side of the rear nail 3. The bulge portion 322 has a flange-

The projecting portion 321 and the expansion portion 322 prevent the distal end of the bell tube 1 from contacting the nut body 31 to prevent corrosion between dissimilar metals.

That is, as described above, the insulating ring 32 is made of brass or iron metal, and the corrugated pipe 1 is made of stainless steel so as to prevent corrosion between dissimilar metals, The end portion of the insulating ring 13 should not come into contact with the groove end portion of the insulating ring expansion pipe packing insertion groove 313 of the nut body 31.

The insulation ring 32 completely blocks the contact between the nut body 31 and the corrugated pipe 1 to prevent corrosion between dissimilar metals.

When the end portion of the tube portion 322 is bulged like the flow preventing portion 12, the cylindrical body is expanded to be in close contact with the flow preventing portion 12 so that water pressure or other external force is applied to the tube body 32 Is not pushed toward the corrugated tube 1 side.

As shown in FIGS. 16 and 17, the reducing-elbow 4 is coupled with a sprinkler head C at one end, and converts the flow of water from horizontal to vertical. The sprinkler head C is vertically It can be installed as a.

The reduced diameter elbow 4 has one end connected to the flare nut 3 and the other end connected to the sprinkler head C so that the inner diameter is reduced and the flow of the fire water supplied from the CPVC branch pipe B An elbow body 41 for changing the direction from horizontal to vertical; And a bracket coupling portion 42 formed at a portion of the elbow body portion 41 that is vertically and vertically turned and coupled to the fixing bracket 5 by a long bolt 43.

A male thread 411 for screwing the flare nut 3 to the flare nut 3 is formed at the end of the horizontal portion of the elbow body 41.

A female thread 412 for threaded engagement with the sprinkler head C is formed at an end of the vertical part of the elbow body 41.

The vertical portion of the elbow body 41 may be formed with guide grooves formed at both ends thereof with V-shaped grooves for guiding one end of the fixing bracket 5, that is, guide groove fittings, to move up and down.

The bracket coupling part 42 is formed with a hexagonal groove 421 formed symmetrically on both sides so as to be able to move up and down on a certain part of the fixing bracket 5 and a tab hole 422 for screw connection with the long bolt 43 Is formed.

18, the fixing bracket 5 supports the load received by the reducing elbow 4, smoothly adjusts the height of the sprinkler head C, And serves to keep the sprinkler head C perpendicular to the ground by preventing the phenomenon that the reducing-elbow 4 is pushed.

The fixing bracket 5 includes an upper horizontal bracket portion 51 fixedly supported on the ceiling slab; A vertical bracket part 52 formed at one end of the lower horizontal bracket part 51 so as to be perpendicular to the upper horizontal bracket part 51 and adapted to adjust the height of the reducing elbow 4; And a lower horizontal bracket part 53 formed at the vertical bracket part 52 by being bent 90 degrees toward the reducing elbow 4 and coupled to the reducing elbow 4. [

In the upper horizontal bracket portion 51, bolt holes 511 are formed in the longitudinal direction to engage the anchor bolts installed on the ceiling slabs at two or more places.

The vertical bracket part (52) has a rectangular bracket coupling part insertion hole (521) for inserting the end of the bracket coupling part (42); Is inserted into the bracket engaging portion insertion slot 521 of the bracket engaging portion 42 inserted through the bracket engaging portion inserting port 521 and is connected to the lower portion of the bracket engaging portion inserting port 521, An elbow guide hole 522 is formed with a predetermined length for guiding the height adjustment by moving up and down.

The lower horizontal bracket part 53 has a long bolt hole 531 in which the long bolt 43 is inserted.

The mounting of the reducing-elbow 4 to the fixing bracket 5 is performed by inserting the bracket engaging portion 42 into the bracket engaging portion inserting hole 521 and then downward along the elbow guiding hole 522 And the long bolt 43 is inserted into the long bolt hole 531 of the lower horizontal bracket 53 to be coupled to the tapped hole 422 of the reducing elbow 4 to rotate the reducing bolt 4, So that the sprinkler head C can be held perpendicular to the ground surface.

According to the expansion and contraction pipe A of the present invention, the joint socket 2 is composed of the socket 21, the O-ring 22 and the fixed insert 23 so that the corrugated pipe 1 is connected to the socket 21 and the fixed insert 23 The socket 21 is made of the same material as the CPVC branch pipe (B), so it is easy to use as an adhesive, but the tightness of the tightness The fixing bracket 5 prevents the pushing of the reducing-elbow 4 and makes it easy to keep the sprinkler head C perpendicular to the ground, thereby improving the reliability and durability of the fire extinguishing pipe. .

A: Extension piping B: CPVC branch piping
C: Sprinkler head 1: Corrugated tube
11: corrugation part 12: flow prevention part
13: terminal section 14: stationary insert mounting section
2: Mating socket
21: socket 211: corrugated pipe joint part
2111: Wrinkle spectacle study 212: Fixed insert coupling part
2121: Studying in insert 2122:
21221: engaging concavity 2123: non-slip projection
213: branch pipe joint part 2131: branch pipe
22: O-ring 23: Fixed insert
231: insert hollow part 232: insert concave /
2321: insert protrusion 23211: straight protrusion
23212: Wedge protrusion 2322: Insert groove
233: Jig coupling hole 3: Flare nut
31: nut body 311: insulating ring sheet face
312: PF screw 313: Nut packing joint surface
32: Insulation ring 321:
322: Expansion part 33: Nut packing
4: Reducing elbow 41: Elbow body
411: male thread 412: female thread
413: guide groove portion 4131: V-shaped groove
42: Bracket coupling portion 421:
422: Tapped hole 43: Long bolt
5: Fixing bracket 51: Upper horizontal bracket part
511: Bolt hole 52: Vertical bracket part
521: Bracket coupling portion insertion port 522: Elbow guide hole
53: lower horizontal bracket part 531: long bolt hole
532: Guide groove groove

Claims (4)

In a telescopic pipe (A) capable of installing a sprinkler head (C) on a CPVC branch pipe (B) for a sprinkler and canceling a stress generated in the CPVC branch pipe (B)
The expansion and contraction pipe (A) has a corrugated pipe (1) for canceling the convenience of piping work and the stress generated in the piping;
One end of the CPVC branch pipe 1 is connected to the CPVC branch pipe B and the other end thereof is connected to the CPVC branch pipe B to stably connect the CPVC branch pipe B with the corrugated pipe 1, A joint socket (2) for preventing bending of the corrugated pipe (1);
One end connected to the sprinkler head C and having a downward elbow 4 for converting the flow of water from horizontal to vertical and allowing the sprinkler head C to be installed vertically;
A flare nut 3 coupled to the reducing nozzle 4 at one side and coupled to the bell tube 1 at the other side to couple the reducing nozzle 4 to the bell tube 1;
The lower end of the sprinkler head C is smoothly adjusted and the downward elbow 4 is prevented from being pushed by the piping at the time of installation, And a fixing bracket (5) for holding the guide (C) perpendicular to the ground,
The joint socket 2 and the corrugated pipe 1 are connected to each other by a slip joint for preventing leakage of the two O-rings 22, and the joint socket 2 and the CPVC branch pipe B are connected by an adhesive Bonded bond bond,
The corrugated pipe 1 is made of stainless steel and has a corrugated portion 11 which is convenient for piping work and which offsets the stress generated in the pipe,
The corrugated tube 1 is inflated to prevent the joints 2 and the rear nuts 3 from being stably fixed and flowing into the outer sides of the corrugated pipe 1 without the corrugated portions 11, Each of the flow preventing portions 12;
A terminal portion 13 is formed at both ends of the flow preventing portion 12 at predetermined intervals to prevent the joint socket 2 and the rear nut 3 from being pulled toward both ends,
The socket (2) has a socket (21) one end of which is inserted with the corrugated pipe (1) and the other end is inserted with the CPVC branch pipe (B) to connect the corrugated pipe (1) to the CPVC branch pipe (B);
Two O-rings (22) fitted in the corrugated pipe (1) and provided inside the socket (21) to maintain airtightness between the socket (21) and the corrugated pipe (1) to prevent leakage;
And the CPVC branch pipe B is inserted into the inner surface of the socket 21 so as to stably engage with the CPVC branch pipe B and to fix the O-ring 22 in a non-pushed position, And a fixed insert (23) for limiting the insertion depth of the pipe (B)
The insert-engaging concave-convex portion 2122 and the stationary insert 23, which are the engaging portions of the stationary insert 23 in the socket 21, are formed in a wedge-
The socket 21 is made of the same CPVC (Chlorinated Polyvinyl Chloride) material as the CPVC branch pipe (B)
The fixed insert 23 is polyethylene which is softer than the CPVC material so as to be easily engaged with the socket 21,
The socket (21) includes a bell pipe coupling part (211) into which the bellows pipe (1) is inserted;
A fixed insert coupling part 212 connected to one end of the bellows pipe coupling part 211 and coupled with the fixed insert 23;
And a branch piping coupling part 213 connected to one end of the fixed insert coupling part 212 and having the same outer diameter as the fixed insert coupling part 212 and having the CPVC branch pipe B inserted therein,
An insert hollow portion 231 is formed in the fixed insert 23 so as to be a passage through which water flows,
The fixed insert 23 has an outer diameter formed with an insert concave / convex portion 232 coupled with the fixed insert engaging portion 212,
The corrugated pipe coupling portion 211 is formed with a corrugated pipe 2111 into which the corrugated pipe 1 is inserted and which is a passage through which the water flows,
An insert insert 2121 in which the corrugated pipe 1 passes through the fixed insert engaging portion 212 to form a terminal portion 13 and a passage through which water flows; An insert engaging concavity 2122 formed in the inner diameter of the insert 2121 and coupled to the stationary insert 23 is formed,
A plurality of slip prevention protrusions 2123 are formed on the outer side of the fixed insert coupling portion 212 to prevent the coupling socket 2 from slipping when being handed,
The branch piping coupling portion 213 is formed with a branch piping middle portion 2131 which is a passage through which the CPVC branch piping B is inserted and adhered with an adhesive,
The corrugated pipe 2111 and the insert 2121 and the branch pipe 2131 are formed in such a manner that the outer diameter difference between the corrugated pipe 1 and the CPVC branch pipe B and the outer diameter difference between the corrugated pipe 1 and the CPVC branch pipe B, The inner diameter of the hollow is different for the formation of the hollow portion 13,
One end of the insert hollow portion 231 is formed with four jig coupling holes 233 for coupling the fixing insert 23 to the fixed insert coupling portion 212 of the socket 21,
A plurality of insert protrusions 2321 are formed at predetermined intervals in the insert concavo-convex portion 232,
The insert protrusion 2321 is formed in an outer diameter of the fixed insert 23 and is inserted into the insert engaging concave portion 2122 so as to have an inverted trapezoid that widens as it goes to the upper portion which does not fall out, A linear protrusion 23211 having a side surface and an upper surface in contact with the insert engaging concave / convex portion 2122;
And a wedge protrusion 23212 which is connected to the linear protrusion 23211 and is inclined at a predetermined angle on both sides to facilitate insertion when inserted into the concave and convex portion 21221 of the insert coupling concave and convex portion 2122,
The insert coupling concavo-convex portion 2122 is formed with coupling concave and convex portions 21221 that are the same as the number of the insert projections 2321. The expansion /
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