JPH116596A - Sprinkler head unwinding pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent breakage of a moulded article by providing a synthetic resin fitting on one end of a metallic pipe body having a corrugated part, and embedding a metal on the end face and/or inner surface of the fitting subject to the shock in flaring the pipe body. SOLUTION: An unwinding pipe comprises a stainless steel pipe body in which a straight pipe and a corrugated part are alternately arranged, and a fitting 10c of revolution type which is formed of the heat resistant hard vinyl chloride and provided on an end straight pipe part 6b, and joined with the end of the synthetic resin pipe 4 through the fitting 10c. The adhesive is applied to an inner circumferential surface of a pipe socket part 30 of the fitting 10c and an outer circumferential surface of the pipe 4, the end of the pipe 4 is inserted in the pipe socket part 30, and held for the prescribed time so as to be connected to each other. The fitting 10c is fitted to the end straight pipe part 6b, the end straight pipe part 6b is flared to form a flared part 21 and a swollen part 23. A metal material 37 is embedded in advance in the end face and the inner surface of a joint body 29 to receive the shock during the working. Breakage of the joint body 29 which is a synthetic resin formed body can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sprinkler head unwinding tube used in a wet sprinkler system.

[0002]

2. Description of the Related Art Conventionally, an unwinding pipe is provided with a metal nipple at one end of a metal pipe body (flexible pipe) having a corrugated portion, and the unwinding pipe is connected to a metal pipe for wet sprinkler equipment through this nipple. I was

[0003]

However, with the use of synthetic resin for the piping for wet sprinkler equipment up to the unwinding pipe, the above-mentioned conventional unwinding pipe cannot be used.

In view of the above, the connecting portion of the unwinding pipe to the synthetic resin pipe is constituted by a synthetic resin molded article, and an unwinding pipe connectable to the synthetic resin pipe is provided, and the molded article is fitted into the pipe body. It is an object of the present invention to prevent the molded product from being damaged by flaring of the end of the tube body and the peripheral wall performed in the state.

[0005]

According to a first aspect of the present invention, there is provided a sprinkler head unwinding tube provided with a synthetic resin pipe joint at one end of a metal pipe body having a corrugated portion.
A metal material is embedded in an end face and / or an inner face of the pipe joint that receives an impact during flaring of the pipe body.

Further, the pipe joint is constituted by an inner cylinder and an outer cylinder, the inner cylinder is fitted and fixed to the pipe body, and the outer cylinder is fitted to the inner cylinder while allowing only rotation. And the pipe joint has a rotary structure.

[0007]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 2 is a schematic view of piping for a wet-type sprinkler facility. In the figure, (1) is an alarm valve, (2) is a sprinkler head, and is a metal sprue for attaching the head (2) to the tip from the alarm valve (1). The pipe (4) from the sprinkler head unwinding pipe (3) is composed of a heat-resistant hard vinyl chloride pipe (4a) and a pipe joint (4b), and the pipe (4) from the alarm valve (1) to the head (2). The inside of each unwinding pipe (3) is filled with predetermined pressure water. When a predetermined indoor temperature is sensed at the head (2), the head (2) ruptures and starts discharging water, and the water pressure drops in the pipe (4) and the unwinding pipe (3) due to the water discharge, and the alarm valve is activated. (1) is opened, and thereafter the fire extinguishing water is continuously pumped to the pipe (4).

[0008] In the figure, reference numeral (5) denotes a multi-way joint for mounting a plurality of heads (2) at one end of a pipe (4). The multi-way joint (5) is also made of metal.

As shown in FIGS. 3 to 6, the unwinding pipe (3) has a stainless steel pipe body (8) provided with a straight pipe section (6) and a corrugated section (7) alternately, and a pipe body (8). ), An iron socket (9) as a head joint provided on one end straight pipe portion (6a), and the other end straight pipe portion (6b) of the pipe body (8).
And a pipe joint (10) made of heat-resistant hard vinyl chloride provided on the head (2) via the socket (9) at one end of a pipe body (8) that can be bent in an arbitrary direction at the wavy portion (7). ), And the other end of the pipe body (8) is bonded to each end of the synthetic resin pipe (4) with an adhesive via a synthetic resin pipe joint (10). ing.

As shown in FIGS. 3 and 4, a polygonal section having an octagonal cross section is provided between the end straight pipe part (6a) on the side where the head (2) is mounted and the outermost wavy part (7a) on this side. (1
In addition to forming 1), the polygonal portion (11) is covered with an insulating resin sheet (12), and the square bar is fixed to the ceiling C channel with side dampers, and the pipe body (8) is formed.
The polygonal portion (11) (insulating portion) is fixed to a square bar by adjusting the level (height) of the head (2) using a pipe stopper.

The socket (9) is, as shown in FIG.
A proximal end mounting portion (1) to a pipe main body (8) having a length capable of inserting the end straight tube portion (6a) and the end of the polygonal portion (11).
3) and a distal end mounting portion (14) for the head (2) projecting from the distal end of the straight end portion (6a). The fitting hole (15a) is formed in a circular shape having the same outer shape as that of the end straight pipe portion (6a), and the fitting hole (15b) of the polygon portion (11) is fitted with the polygon portion (15). An O-ring groove (16) is formed on the peripheral surface of the circular hole (15a) at a portion where the straight end portion (6a) fits, and is formed at the one end mounting portion ( A female screw (17) (parallel screw) for screwing the male screw on the head (2) side is formed on the inner peripheral surface of 14).

[0012] Then, the base end mounting portion (1) of the socket (9) in which the O-ring (18) is mounted in the O-ring groove (16).
After inserting the end straight pipe portion (6a) and the end of the polygonal portion (11) into the holes (15a) (15b) of 3), the straight end portion (6a) corresponding to the O-ring groove (16). Is expanded radially in the radial direction by flaring, and an O-ring (1) is inserted between the expanded portion (19) and the O-ring groove (16).
8) is compressed, and the proximal mounting part (13) and the straight terminal pipe part (6) are compressed.
a) sealing the gap between them, and by engaging the O-ring groove (16) with the bulging portion (19), restricts movement of the socket (9) in the tube axis direction and rotation in the circumferential direction, and By fitting the polygonal part (11) and the base end mounting part (13), the rotation of the socket (9) in the circumferential direction is restricted, and the socket (9) is fitted and fixed to one end of the tube body (8). It is configured as follows.

The socket (9) is made of iron and is inexpensive in terms of material and can be easily processed as compared with a stainless steel socket. Therefore, the product cost of the socket (9) can be extremely reduced, and the socket (9) can be rolled. Although there is an advantage of reducing the product cost of the outlet pipe (3), it is extremely difficult to attach the socket (9) by welding because of its material. However, as described above, the movement of the socket (9) in the tube axis direction and the rotation in the circumferential direction with respect to the tube body (8) are controlled by the engagement between the O-ring groove (16) and the bulging portion (19) and the polygonal portion. By restricting by fitting (11) and the base end mounting portion (13) (fitting of a shaft with a polygonal cross section and a hole), the socket (9) is securely fixed with the same performance as welding. be able to. Also, since the mounting of the socket (9) is extremely cheap and easy as compared with welding, the product cost of the unwinding tube (3) can be greatly reduced.

The inner and outer surfaces of the socket (9) are resin-coated with an epoxy resin or the like to provide corrosion resistance and insulation. The inner and outer surfaces of the socket (9) may be galvanized. Further, it is preferable that the same engaging portion as the O-ring groove (16) and the bulging portion (19) is provided in multiple stages between the inner surface of the socket (9) and the end straight pipe portion (6a). The attachment may be performed for each engagement portion, or one or two of them.

On the other hand, the pipe joint (10) is a male pipe joint (10a) shown in FIG. 5 and a female pipe joint (10b) shown in FIG.
The male pipe fitting (10a) includes a sleeve-shaped heat-resistant hard vinyl chloride fitting main body (20) fitted to the outside of the end straight pipe part (6a) on the side to be connected to the pipe (4),
Flare section (21) formed at the end of the straight straight pipe section (6b)
Is brought into contact with the distal end face of the joint body (20), and the outermost wavy portion (7b) on this side is brought into contact with the base end face of the joint body (20), and the flare portion (21) and the wavy portion (7b) The joint body (20) is fitted and fixed to the outer periphery of the straight pipe portion (6b) by restricting the movement in the pipe axis direction and the rotation in the circumferential direction, and an O-ring groove is formed in the inner peripheral surface near the tip of the joint body (20). (22), and a straight straight pipe end (6b) corresponding to the O-ring groove (22).
The O-ring (24) is compressed between the bulging portion (23) formed by radially expanding and expanding the peripheral wall by flaring and the O-ring groove (22), and the joint body (20) and the terminal end are compressed. The gap between the straight pipe portions (6b) is sealed, and the engagement between the O-ring groove (22) and the bulging portion (23) prevents the joint body (20) from moving in the pipe axis direction and rotating in the circumferential direction. Regulating.

Then, an adhesive is applied to the inner peripheral surface of the terminal port of the pipe (4) to be connected to the outer peripheral surface of the male pipe joint (10a), and the male pipe joint (10a) is fitted around the outer periphery. By inserting the fixed end of the unwinding pipe (3) into the end receptacle of the pipe (4) to be connected to for a predetermined length and holding it for a predetermined time, the unwinding pipe (3) to the pipe (4) is obtained. Connection.

The female pipe joint (10b) has a proximal end mounting portion (25) fitted to the outside of the straight straight pipe portion (6b) on the side connected to the pipe (4) and a distal end of the straight straight pipe portion (6b). It has a socket-like heat-resistant hard vinyl chloride joint main body (27) having a pipe receiving portion (26) to be protruded, and a flare portion (21) formed at the end of the end straight pipe portion (6b). 27), and the outermost wavy part (7a) on this side is brought into contact with the base end face of the joint body (27), and the flare part (21) and the wavy part (7b) The fitting main body (27) is fitted and fixed to the outer periphery of the straight straight pipe part (6b) by restricting the movement in the pipe axis direction and the rotation in the circumferential direction, and the inner peripheral surface near the distal end of the base mounting part (25). An O-ring groove (22) is provided, and the end straight pipe portion (6b) corresponding to the O-ring groove (22).
The O-ring (24) is compressed between the bulged portion (23) formed by radially expanding and bulging the peripheral wall by flaring and the O-ring groove (22), and the joint body (27) and the end are compressed. The gap between the straight pipe portions (6b) is sealed, and the engagement between the O-ring groove (22) and the bulging portion (23) prevents the joint body (27) from moving in the pipe axis direction and rotating in the circumferential direction. Regulating.

Then, an adhesive is applied to the outer peripheral surface of the end of the pipe (4) to be connected to the inner peripheral surface of the pipe socket (26) of the female pipe joint (10b), and the outer periphery of the female pipe joint is (1
0b) is inserted into the end pipe receiving portion (26) of the unwinding pipe (3) to which the fitting is fixed, and the end of the pipe (4) to be connected is inserted and held for a predetermined time, so that the pipe (4) is connected to the pipe (4). Of the unwinding tube (3).

The male fitting (10a) and the female fitting (10b) are fixed, and FIG. 1 shows a rotary fitting (10a).
c) is shown. This rotary type pipe joint (10c) is a sleeve-shaped heat-resistant hard vinyl chloride joint body (29) which is an inner cylindrical body fitted and fixed to the outside of the end straight pipe part (6b) on the side to be connected to the pipe (4). The flare portion (21) formed at the end of the straight straight pipe portion (6b) is brought into contact with the distal end surface of the joint body (29), and the outermost wavy portion (7b) on this side is joined to the joint body (29). Abut on the base end face, flare part (21)
The joint body (29) is fitted and fixed to the outer periphery of the end straight pipe part (6b) by regulating the movement in the pipe axis direction and the rotation in the circumferential direction with the wavy part (7b) and the middle part of the joint body (29). An O-ring groove (22) is provided on the inner peripheral surface of the portion, and a bulging portion (23) formed by radially expanding and expanding the peripheral wall of the end straight pipe portion (6b) corresponding to the O-ring groove (22) by flare processing. ) And the O-ring groove (22), compresses the O-ring (24), seals the gap between the joint body (29) and the end straight pipe portion (6b), and connects the O-ring groove (22) with the O-ring groove (22). Bulge (23)
By this, the movement of the joint body (29) in the tube axis direction and the rotation in the circumferential direction are restricted.

Further, a sleeve-shaped outer cylindrical body which has its base end rotatably fitted to the outer periphery of the fixed-side joint body (29) and has a pipe socket (30) at the distal end of the joint body (29). And a taper (32) having a larger diameter at the proximal end than at the distal end on the outer surface of the joint body (29). The taper (33) corresponding to the joint body (29)
And a plurality of slits (34) are provided at the proximal end of the rotating cylinder (31), and the rotating cylinder (31) is fitted to the proximal end of the joint body (29). And the split legs (3) between the slits (34).
The tip of (5) is provided with a claw (36) to be engaged with the tip surface of the joint body (29), and the taper (32) (33) and the claw (3)
6) the rotary cylinder (31) is fitted to the outside of the joint body (29) by restricting the movement in the tube axis direction and allowing only the rotation,
Further, the joint body (29) and the rotary cylinder (3) are inserted through the O-ring groove (22) at the intermediate portion of the taper (33) of the rotary cylinder (31).
An O-ring (24) is fitted between 1) to seal the gap therebetween.

Then, an adhesive is applied to the outer peripheral surface of the end of the pipe (4) to be connected to the inner peripheral surface of the pipe socket (30) of the rotary type pipe joint (10c), and the rotary type pipe joint is formed on the outer circumference. (1
0c) is inserted into the end tube receiving portion (30) of the unwinding tube (3) to which the fitting is fixed, and the end of the tube (4) to be connected is inserted and held for a predetermined time, so that the tube (4) is inserted into the tube (4). Of the unwinding tube (3).

Each of the above pipe joints (10a) (10b) (10
c) is inserted into the end straight pipe part (6b) before flare processing,
Thereafter, the end straight pipe portion (6b) is flared to form a flared portion (21) and a bulging portion (23).
0) (27) (29) The joint body (20) (27), which is a synthetic resin molded product, in which a metal material is embedded in the end face and the inner face in advance.
In addition to preventing the breakage of (29), the strength of the O-ring (24) mounting portion is improved to improve the water stoppage.

That is, the joint body (20) (27) (29)
When the injection molding is performed, a stainless steel bush (37) provided with the O-ring groove (22) on the inner surface thereof is put in a molding die, and the joint body (2) is formed by insert molding.
0) (27) and (29) a bush (3) on the inner surface side slightly before the seal portion for inserting the O-ring (24).
7) is embedded, and a bulging portion (23) is formed from the distal end surfaces of the joint bodies (20) and (29) and the receiving bottom surface (28) of the joint body (27) which are subjected to impact during flaring of the flare portion (21).
(20) (2) subject to impact during flaring
7) The surface of the seal portion of (29) is continuously formed of a metal material.

The rotary tube (3) of the rotary type pipe joint (10c)
The bush (37) is buried in the same manner as described above so that the material of the seal portion of 1) is also a metal material.

FIGS. 7 and 8 show a structure in which a metal multi-way joint (5) is connected to the end of a synthetic resin pipe (4), in which (5a) is the joint body, and (39) is the joint body. Packing, (40) washer, (41) retaining ring, (4
2) is a nut, and (43) is a stainless steel in-core. The in-core (43) is inserted into the inner end of the pipe (4), and the nut (43) is inserted into the outer end of the pipe (4) into which the in-core (43) is inserted. 42), retaining ring (4
1), a washer (40), and a packing (39) are inserted in this order, and the end of the pipe (4) into which these are inserted is inserted into the joint body (5a) and tightened with a nut (42), and the synthetic resin pipe (4) is inserted. A metal multi-way joint (5) to the end of
The head (2) is configured to be mounted from the multiway joint (5) in multiple directions through the unwinding tube (3).

When the multi-way joint (5) is not directly connected to the end of the pipe (4), a sleeve-shaped pipe joint made of heat-resistant hard vinyl chloride is provided in the same manner as the end of the pipe (4). Thus, the end of the pipe (4) can be joined with the adhesive through the pipe joint.

FIG. 9 also shows another structure in which a metal multi-way joint (5) is connected to the end of the synthetic resin pipe (4). The joint body (5a) is provided with a sleeve-like pipe joint (44) made of a heat-resistant hard vinyl chloride to be connected by the joint body (5a).
The base end of the pipe fitting (44) that fits into the ring (4)
5) Caulking and fixing. O-rings (46) and (47) are inserted between the pipe joint (44) and the joint body (38).

FIG. 10 also shows another structure in which a metal multi-way joint (5) is connected to the end of the synthetic resin pipe (4). Joint made of heat-resistant hard vinyl chloride (44)
Is provided on the joint body (5a), and the head (4) of the hammer (48) to be fitted to the joint body (5a) is provided.
9) is fixed via a bush (50). O-ring (51) between the hammer (48) and the joint body (5a) and between the bush (50) and the joint body (5a)
(52) and (53) are included.

The connection between the multiway joint (5) and the unwinding pipe (3) is made by connecting a pipe joint made of a synthetic resin such as a connection port with the pipe (4) at each branch port of the multiway joint (5). In the case of providing the pipe joint (10a) (1) of the unwinding pipe (3) shown in this embodiment,
0b) and (10c) on the other hand, in the case where a synthetic resin pipe joint such as a connection port with a pipe (4) is not provided at each branch port of the multiway joint (5), a conventional metal end is provided at one end. The unwinding tube provided with the nipple is used.

[0030]

As is apparent from the above embodiments, according to the present invention, synthetic resin pipe joints (10a) (10b) (10c) are provided at one end of a metal pipe body (8) having a corrugated portion (7). A metal material (37) embedded in an end face and / or an inner face of the pipe joint (10a) (10b) (10c) which receives an impact during flaring of the pipe body (8), and is a synthetic resin for wet sprinkler equipment. A metal unwinding pipe (3) connectable to the pipe (4) can be obtained, and the molded pipe fittings (10a) (10b) (10c) are fitted into the pipe body (8). The pipe body (8) can prevent the molded product from being damaged by flaring of the end portion and / or the peripheral wall.

Further, the pipe joint (10c) is connected to the inner cylindrical body (29).
And an outer cylinder (31), the inner cylinder (29) is fitted and fixed to the pipe body (8), and the outer cylinder (31) is fixed to the inner cylinder (29).
The fitting (10
c) can be of a rotary type.

[Brief description of the drawings]

FIG. 1 is a cross-sectional explanatory view of a synthetic resin rotary pipe joint at the base end of an unwinding pipe.

FIG. 2 is a schematic view of piping for wet sprinkler equipment.

FIG. 3 is an explanatory sectional view of a tube main body of the unwinding tube.

FIG. 4 is a sectional explanatory view of a sprinkler head mounting portion at the end of an unwinding tube.

FIG. 5 is an explanatory sectional view of a synthetic male fixed male pipe joint at the base end of the unwinding pipe.

FIG. 6 is an explanatory cross-sectional view of a synthetic female fixed female pipe joint at the base end of the unwinding pipe.

FIG. 7 is an explanatory sectional side view showing a connection structure between a wet sprinkler facility pipe and a multi-way joint.

FIG. 8 is a cross-sectional plan view showing a connection structure between a wet sprinkler facility pipe and a multi-way joint.

FIG. 9 is an explanatory sectional view showing another connection structure of the piping for the wet sprinkler facility and the multi-way joint.

FIG. 10 is an explanatory sectional view showing another connection structure of the piping for a wet sprinkler facility and a multi-way joint.

[Explanation of symbols]

 (3) Sprinkler head unwinding pipe (4) Pipe made of synthetic resin for sprinkler equipment (7) Wavy part (8) Pipe body (10) Head joint (21) Flare part (22) O-ring groove (23) Swelling Part (37) Metal material

Claims (2)

[Claims] 1. A pipe joint made of synthetic resin is provided at one end of a metal pipe body having a wavy portion, and a metal material is embedded in an end face and / or an inner surface of the pipe joint which receives an impact during flaring of the pipe body. A sprinkler head unwinding tube, characterized in that: 2. A pipe joint comprising an inner cylinder and an outer cylinder, wherein the inner cylinder is fitted and fixed to the pipe body, and the outer cylinder is fitted to the inner cylinder by allowing only rotation. The sprinkler head unwinding tube according to claim 1, wherein