KR101909716B1 - Connecting structure of a flexible hose for a sprinkler - Google Patents

Abstract

Disclosed is a connection structure of a flexible pipe for a sprinkler, which is installed between a sprinkler head and a branch pipe for supplying fire water to facilitate installation and replacement of a flexible pipe coping with a height difference, a horizontal variance, and the like, and secures a proper coupling position of a flexible pipe connected to the branch pipe to largely improve working convenience and constructability. According to the present invention, a plurality of locking protrusions (12) are formed on a radial outer surface of one end part of the flexible pipe (10) coupled to a branch pipe side, and a rubber ring (32) and a plastic ring (34) are alternately disposed between the locking protrusions (12) to prevent leakage of fluid. A joint lock (20), which is disposed between a new pipe (10) and the branch pipe (P) to receive the end part of the new pipe (10) therein and restrict the final coupling position thereof so as to secure a proper coupling state, is manufactured by chlorinated polyvinyl chloride (CPVC), and a joint nut (23) is screw-coupled to the outside of one end part of a body (22) of the joint lock (20). When the end part of the flexible pipe (10) is inserted into the body of the joint lock (22), the joint nut (23) is rotated and coupled until a plurality of first stopping steps (25) formed on a radial outer surface of the body (22) at a position, in which a male screw part (24) of the body (22) is finished, are inserted into a plurality of insertion grooves (26) formed on one surface of the joint nut (23). Accordingly, a proper coupling state is ensured.

Description

A connecting structure of a flexible pipe for a sprinkler

The present invention relates to a connection structure of a stretch pipe for a sprinkler, and more particularly, to a pipe connection structure for a sprinkler which is installed between a sprinkler head and a branch pipe for firefighting and water supply, The present invention relates to a connection structure for a sprinkler expansion and contraction pipe, in which the convenience of operation and the workability are greatly improved by assuring an appropriate coupling position of the expansion and contraction pipe to be connected to the pipe.

The sprinkler is a function to automatically detect the heat in a fire and to suppress the fire. It is generally installed on the ceiling of each floor of the building to divide each floor of the building in consideration of the possibility of fire suppression. The sprinkler uses a closed head and an open head depending on the object to be protected and the installation place. The closed head system is wet, dry, and ready-to-operate. Generally, if the head is thermally operated, the fire water is discharged, and the pressure balance due to the secondary pressure drop is broken and the valve is opened. The pressure switch senses the flow of the water due to the opening of the valve and notifies the receiver of the opening of the valve and the pump is automatically started by the pressure switch of the pressure chamber according to the pressure drop so that the radiation is continuously emitted through the sprinkler head .

Water pipes are installed to supply water to the head of the sprinkler. The water pipes refer to all pipes that supply water to the sprinkler head from the water supply and outdoors. The water supply piping of the sprinkler facility is a main component of the equipment used in the fire and should be able to supply the effective water required for digestion. Generally, the diameter of the main pipe is 100 mm or more, and the connection pipe of the waterproof port is 65 mm or more. Crossover piping is a piping that supplies water to branch piping, either directly or through vertical piping, installed horizontally with the piping or beneath the branch piping, with a minimum diameter of 40 mm or more. The sprinkler-installed branch piping branches from the upper part of the cross piping or branches from the side, and is 32 mm or more and 50 mm or less. The branch pipe is fluidly connected to the expansion pipe, which is the expansion pipe, through the adapter.

The corrugated pipe is introduced for convenience and efficiency when connecting the sprinkler head to the branch pipe. That is, the corrugated pipe is a stretch pipe installed to correspond to height difference, horizontal deviation, etc. between the branch pipe and the sprinkler, and is fluidly connected to the sprinkler head via a releasable sieve or elbow.

Korean Patent Registration No. 10-1645292 discloses a telescopic pipe for a CPVC branch piping and a method for manufacturing the same. In this invention, a CPVC socket is used to connect a stretch pipe, which is a corrugated pipe made of a stainless steel material, It can be easily combined with adhesive without using other adapters to reduce the construction cost. Multiple o-rings can be installed in the socket to prevent leakage. The connection with the reducer for the sprinkler installation is made using a flare nut with insulation ring and nut packing. To improve the convenience of work.

However, in the present invention, since the extensible pipe is connected to the branch pipe by using an adhesive, if there is a problem in the corrugated pipe in the future, there is a problem that the branch pipe must be cut and newly installed. Further, the coupling structure is complicated, the stability of the fixing ring is deteriorated, and it is difficult to assemble and disassemble the expansion pipe and the adapter.

Korean Patent Registration No. 10-1476729 discloses a telescopic pipe reinforced by a combination of an extensible pipe and an adapter and a method of manufacturing the same. In this invention, the shape of the adapter body is changed according to the material of the main pipe, CPVC piping, it is possible to improve the durability of pipe by preventing the corrosion of dissimilar metals by strengthening the connection between the expansion pipe and the adapter by properly positioning the fixed bushing, the fixed ring, and the insulating ring. .

However, in the present invention, since the socket connecting the corrugated pipe and the main pipe joint portion of the main pipe are joined by the adhesive using the adhesive, if the corrugated pipe is in trouble in the future, the main pipe must be cut and newly installed. In addition, since the mounting structure needs to be additionally provided at one end of the corrugated pipe for the installation of the stationary ring and the insulating ring, there is a problem in that the joint structure is complicated, and assembly and disassembly are difficult.

Korean Patent Registration No. 10-1346722 discloses a fire extinguishing piping and a method of manufacturing the same. In this invention, when a main pipe of a sprinkler uses a CPVC material, a CPVC socket is used, and a stainless steel pipe So that it can be easily bonded as an adhesive without reducing the function of the expansion and contraction pipe.

However, in the present invention, since the extensible pipe is connected to the main pipe by using an adhesive, if there is a problem in the corrugated pipe in the future, there is a problem that the main pipe is cut and newly installed. In addition, since a large number of O-rings are installed to prevent leakage, and a joint structure using a flare nut having an insulating ring and a nut packing is adopted, the structure is complicated, which makes it difficult to assemble and disassemble the expansion pipe and the adapter, there was.

Korean Patent Registration No. 10-1645292 (Registration date: July 29, 2016) Korean Patent Registration No. 10-1476729 (Registration date: December 19, 2014) Korean Patent Registration No. 10-1346722 (Registration date: December 24, 2013)

SUMMARY OF THE INVENTION The present invention has been made in an effort to solve the above problems, and it is an object of the present invention to provide a fire extinguishing system which is installed between a sprinkler head and a fire-fighting and water supply branch pipe to facilitate installation and replacement of expansion pipes, And to provide a connection structure for a sprinkler expansion and contraction pipe which can greatly improve the convenience of work and the workability.

In order to solve the above-described technical problems,

A connection structure for a sprinkler expansion joint pipe installed to correspond to a height difference and a horizontal direction deviation between a sprinkler head installed inside a building ceiling and a fire-fighting water supply branch pipe,

I) a telescopic pipe having one end connected to the sprinkler head via a reduced-pressure elbow and a plurality of locking projections formed on a radially outer surface of the other end; And

And ii) a joint lock disposed between the other end portion of the expansion pipe and the branch pipe for accommodating the other end portion of the expansion pipe and restricting its final engagement position to ensure an appropriate fastening state, ,

The joint lock comprises:

a) a body made of chlorinated polyvinyl chloride (CPVC) and having a central opening through which the other end of the extensible pipe and one end of the fire-supply and water supply branch pipe are inserted,

b) a joint nut fastened to one end of the body in a screw-

Wherein when the other end of the expansion pipe is inserted into the central opening of the body, the flexible pipe is inserted into the central opening while engaging with the resilient inlet inner protrusion formed at one end of the body. Provides a connection structure.

Wherein the expansion and contraction pipe is made of stainless steel and is formed as a corrugated pipe except for a predetermined length near the one end and the other end, Characterized in that the ring and the plastic ring are arranged alternately.

According to the first aspect of the present invention, on the radially outer surface of one end of the body of the joint lock, a male screw portion is formed over a predetermined length from one free end of the body to the inside of the body, A plurality of first detent jaws protruding toward the free end of the body on the radially outer surface of the body at an adjacent position where the male thread portion ends to oppose to each other, And when the joint nut is screwed to the male threaded portion, the joint nut is coupled to the fitting groove while rotating until the first stopping jaw is inserted into the fitting groove .

According to a second aspect of the present invention, on the radially outer surface of one end of the body of the joint lock, a male screw portion is formed over a predetermined length from one free end of the body to an inner direction of the body, A plurality of fitting jaws protruding toward the free end of the body on the radially outer surface of the body at an adjacent position where the male threaded portion is opposed to the body, and a radial inner surface of the joint nut has a size and shape corresponding to the fitting jaw A plurality of second detents are formed, and when the joint nut is screwed to the male screw portion, the joint nut is coupled while being rotated until the fitting jaw is caught by the second detent jaw.

As described above, according to the present invention, by optimizing the structure of the joint lock and the joint nut for connecting one end portion of the corrugated pipe to the branch pipe for firefighting and water supply, it is possible to assure the optimum joining position to one end of the corrugated pipe, The convenience and the workability are greatly improved, and the labor cost is reduced and the air is shortened. Also, when the joint lock is made of chlorinated polyvinyl chloride (CPVC) material and a screw connection structure with a joint nut is adopted, a problem is caused in the prior art that one end of a bellows pipe is connected to a branch pipe by using an adhesive It is possible to fundamentally solve the problem of cutting a branch pipe and installing a new pipe.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying advantages and features of the present invention will be more fully understood and readily appreciated from the following detailed description taken in conjunction with the accompanying drawings, in which:
1 is a view showing a connection structure of a telescopic pipe for a sprinkler according to the present invention;
FIG. 2 is a view showing an example of a joint lock and a joint nut used in the connection structure shown in FIG. 1, in which the expansion and contraction pipe is omitted for the convenience of explanation; And
FIG. 3 is a view showing another example of a joint lock and a joint nut employed in the connection structure shown in FIG. 1, in which the expansion / contraction pipe is omitted for convenience of explanation; FIG.

Before describing at least one embodiment of the present invention in detail, it will be understood by those skilled in the art that the present invention is not limited to the configurations disclosed in the following specification or illustrated in the drawings and the arrangement of parts . Therefore, other embodiments of the invention are possible and may be practiced and carried out in various ways. It is also to be understood that the phraseology and terminology employed herein is for the purpose of description and is not to be construed as limiting the invention.

All of the comparative descriptions used herein, such as left, right, top and bottom, are made with reference to the accompanying drawings, but are not meant to be limiting. The described embodiments can be understood as providing desirable features of the variable aspects of certain embodiments, and thus aspects of features, components, modules, elements, and / or descriptions are substantially deviated from the disclosed apparatus or method Can be coupled, interconnected, ordered, separated, exchanged, positioned and / The shape and size of the components are exemplary and can be changed without substantially affecting or limiting the invention disclosed unless otherwise specified. Unless otherwise specified, like or corresponding elements throughout the drawings will be represented by like or corresponding reference numerals.

Hereinafter, a connection structure of a telescopic pipe for a sprinkler according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Fig. 1 schematically shows a connection structure of a telescopic pipe for a sprinkler according to the present invention.

1, the expansion and contraction pipe 10 for a sprinkler according to the present invention is installed between a sprinkler water supply branch pipe P and a reeducer or a decompression elbow L which is a release socket for installing a sprinkler head H, P), it is convenient and efficient to connect the sprinkler head (H). That is, the expansion / contraction pipe 10 is provided to correspond to height difference, horizontal deviation, etc. between the branch pipe P and the sprinkler head H.

The expansion and contraction pipe 10 is made of a stainless steel material and is formed as a corrugated pipe to compensate for the stress generated in the pipe in consideration of the convenience of piping work except for a certain length near both ends. One end of the expansion and contraction pipe 10 is connected to the sprinkler head H via a loupe or a reduced-pressure elbow L, and a plurality of locking projections 12 are formed on the radially outer surface of the other end. A rubber ring 32 and a plastic ring 34 are alternately arranged between the plurality of locking projections 12 of the expansion and contraction pipe 10 to prevent fluid leakage.

On the other hand, a joint lock 20 is disposed between the other end of the expansion / contraction pipe 10 and the branch pipe P for a sprinkler. The joint lock 20 accommodates the other end of the expansion / And the final engagement position is limited to ensure a proper engagement state.

The joint lock (20) is made of chlorinated polyvinyl chloride (CPVC). CPVC is a high-value product with a 10% higher chlorine content than PVC. It is more resistant to heat and pressure corrosion than conventional PVC. CPVC can be used for piping systems requiring low temperature and low temperature loss and can maintain constant process temperature at all times. It also prevents condensation and prevents damages to walls and structures. do. Because of these advantages, CPVCs are widely used to manufacture fire-fighting sprinkler piping, hot water piping, and industrial piping. Steel piping is rusty over time, but CPVC is not corroded, it is strong against heat and pressure, and it is easy to construct because it is light in weight. In terms of price, CPVC is sold at about half the price of regular PVC.

FIG. 2 shows a joint lock and a joint nut according to a first preferred embodiment of the present invention.

1 and 2, the joint lock 20 accommodates the other end of the expansion / contraction pipe 10 facing the branch pipe P inside the body 22 and at the same time, Lt; RTI ID = 0.0 > P). ≪ / RTI > To this end, a central opening 21 is formed through the interior of the body 22 of the joint lock 20.

A male screw portion 24 is formed on one radial outer surface of one end of the body 22 from a free end portion of the body 22 through a free end portion of the body 22, 22 in the longitudinal direction. On the radially outer surface of the body 22, a plurality of first stop jaws 25 extend toward the free end of the body 22 at a proximal position where the male threaded portion 24 terminates opposite the free end of the body 22, Respectively. Since the first detent jaw 25 is broken when the joint nut 23 screwed to the male threaded portion 24 of the body 22 is rotated beyond the proper engagement position, the joint lock 20 as the fastening member can be broken In order to solve this problem, a final engagement position, that is, an appropriate fastening state is introduced so as to be able to be recognized.

A plurality of fitting grooves 26 having a size and shape corresponding to the first detent jaws 25 are formed on one surface of the joint nut 23 corresponding to the first detent jaws 25 formed on the body 22 do. When the joint nut 23 is screwed to the male threaded portion 24, the joint nut 23 is engaged with the first stopping jaw 25 of the body 22 in the fitting groove 26 of the joint nut 23, Are coupled while being rotated until they are inserted. Therefore, the proper fastening state is ensured.

On the other hand, a resilient inlet inner protrusion 29 is formed at one end of the body 22 facing the expansion / contraction pipe 10. The resilient inlet inner projection 29 is engaged with the plurality of locking projections 12 of the expansion and contraction pipe 10 when the end of the expansion pipe 10 is inserted into the central opening 21 of the joint lock 20, So that the insertion depth of the insertion hole 10 can be adjusted. That is, when the end of the expansion pipe 10 is inserted into the central opening 21 of the body 22, it is inserted into the central opening 21 while engaging with the inlet inner projection 29.

FIG. 3 shows a joint lock and a joint nut according to a second preferred embodiment of the present invention.

The joint lock and the joint nut according to the second preferred embodiment of the present invention are similar to the joint lock and the joint nut according to the first preferred embodiment of the present invention as described above and can adjust the insertion depth of the expansion and contraction pipe 10 The structure that makes it different is different.

Referring to FIGS. 1 and 3, a joint nut 23 is fastened to one end of the body 22 in a threaded manner. For this purpose, on the radially outer surface of one end of the body 22, Is formed over a certain length in the direction of the inside of the body 22 from one free end of the body 22. A plurality of fitting jaws 27 protrude toward the free end of the body 22 on the radially outer surface of the body 22 in the vicinity of the end of the male thread 24 facing the free end of the body 22 do. Correspondingly, on the radially inner surface of the joint nut 23, a plurality of second stopping jaws 28 having a size and shape corresponding to the fitting jaws 27 are formed. Thereby, when the joint nut 23 is screwed to the male threaded portion 24, the joint nut 23 is moved until the fitting step 27 is caught by the second stopping jaw 28 of the joint nut 23 While being rotated. Therefore, the proper fastening state is ensured.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention as defined by the following claims. It can be understood that it is possible.

10: expansion pipe 12:
20: joint lock 21: central opening
22: body 23: joint nut
24: male threads 25, 28: stop jaws
26: fitting groove 27: fitting jaw
29: inlet inner protrusion 32: rubber ring
34: Plastic ring H: Sprinkler head
L: Pressure reducing elbow P: Branch piping

Claims (4)

A sprinkler expansion pipe for installing a sprinkler head (H) installed in the inside of a building ceiling and a fire pipe (P) having chlorinated polyvinyl chloride (CPVC) In the connection structure of Fig.
I) an end portion connected to the sprinkler head (H) via a reduced-pressure elbow (L), made of stainless steel material, and having one end connected to the sprinkler head (H) A pair of latching protrusions 12 separated from the bellows are formed on the outer surface of the other end, and between the pair of latching protrusions 12, A retraction pipe (10) in which a rubber ring (32) and a plastic ring (34) are alternately arranged; And
(Ii) the other end of the expansion / contraction pipe 10 is disposed between the other end of the expansion / contraction pipe 10 and the branch pipe P, and the other end of the expansion / contraction pipe 10 is accommodated therein, And a joint lock (20)
The other end of the expansion and contraction pipe 10, in which the rubber ring 32 and the plastic ring 34 are alternately arranged to prevent fluid leakage between the pair of locking projections 12, When the rubber ring 32 is inserted into the opening 21, the rubber ring 32 is inserted into the inner surface of the central opening 21 in close contact therewith,

The joint lock (20)
a) a body made of chlorinated polyvinyl chloride (CPVC) and having a central opening 21 for receiving the other end of the expansion pipe 10 and one end of the fire supply and water supply branch pipe P, (22)
b) a joint nut (23) coupled to the other end of the expansion / contraction pipe (10), screwed on one end of the body (22) and made of chlorinated polyvinyl chloride (CPVC) ; ≪ / RTI >
A male screw portion 24 formed on an outer surface of the body 22 and extending from one free end of the body 22 to a predetermined length in an inner direction of the body 22;
(22) protruding from the outer surface of the body (22) toward the free end of the body (22) at a position adjacent to the free end of the body (22) A stop chin 25; And
And a plurality of fitting grooves 26 formed on one surface of the joint nut 23 and having a size and shape corresponding to the first detent jaws 25,
When the joint nut 23 is screwed into the male screw portion 24, the joint nut 23 is rotated and engaged until the first stop jaw 25 is inserted into the fitting groove 26, It is possible to prevent the joint lock 20 from being lost due to excessive rotation of the joint nut 23 by restricting the final engagement position of the body 22 that assures the proper fastening state of the joint nut 23 A connection structure of a telescopic pipe for a sprinkler.
delete delete A sprinkler expansion pipe for installing a sprinkler head (H) installed in the inside of a building ceiling and a fire pipe (P) having chlorinated polyvinyl chloride (CPVC) In the connection structure of Fig.
I) an end portion connected to the sprinkler head (H) via a reduced-pressure elbow (L), made of stainless steel material, and having one end connected to the sprinkler head (H) A pair of latching protrusions 12 separated from the bellows are formed on the outer surface of the other end, and between the pair of latching protrusions 12, A retraction pipe (10) in which a rubber ring (32) and a plastic ring (34) are alternately arranged; And
(Ii) the other end of the expansion / contraction pipe 10 is disposed between the other end of the expansion / contraction pipe 10 and the branch pipe P, and the other end of the expansion / contraction pipe 10 is accommodated therein, And a joint lock (20)
The other end of the expansion and contraction pipe 10, in which the rubber ring 32 and the plastic ring 34 are alternately arranged to prevent fluid leakage between the pair of locking projections 12, When the rubber ring 32 is inserted into the opening 21, the rubber ring 32 is inserted into the inner surface of the central opening 21 in close contact therewith,

The joint lock (20)
a) a body made of chlorinated polyvinyl chloride (CPVC) and having a central opening 21 for receiving the other end of the expansion pipe 10 and one end of the fire supply and water supply branch pipe P, (22)
b) a joint nut (23) coupled to the other end of the expansion / contraction pipe (10), screwed on one end of the body (22) and made of chlorinated polyvinyl chloride (CPVC) ; ≪ / RTI >
A male screw portion 24 formed on an outer surface of the body 22 and extending from one free end of the body 22 to a predetermined length in an inner direction of the body 22;
A plurality of fitting jaws 23 protruding toward the free end of the body 22 on the outer surface of the body 22 at a position adjacent to the free end of the body 22 and adjacent to the end of the male screw 24, (27); And
And a plurality of second stoppers (28) formed on the inner surface of the joint nut (23) and having a size and shape corresponding to the fitting step (27)
When the joint nut 23 is screwed into the male screw portion 24, the joint nut 23 is rotated until the plurality of second stoppers 28 are engaged with the plurality of fitting jaws 27 By restricting the final engagement position of the body 22 to ensure proper engagement of the joint nut 23, it is possible to prevent the joint lock 20 from being lost due to excessive rotation of the joint nut 23 Wherein said sprinkler pipe is connected to said sprinkler pipe.

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