JPH116586A - Sprinkler head unwinding pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize equivalent performance to that of the welding without executing the welding by providing a hole to be fitted to a part of polygonal section of a pipe body, and an 0-ring groove to engage a swollen part of circular section on an iron head joint on one end of a stainless steel pipe body. SOLUTION: Among holes in a base end fitting part 13 of an iron socket 9, a hole 15a of a part in which an end straight pipe part 6a of a stainless steel pipe body is fitted is formed circular same as the contour of the hole, and a hole 15b of a part in which an end part of a polygonal part 11 is fitted is formed octagonal same as the contour of the hole, and an O-ring groove 16 is formed in a circumferential surface of the circular hole 15a, and a female screw 17 to which a male screw on a head 2 side is screwed is formed on an inner circumferential surface of a tip fitting part 14. An O-ring 18 is mounted on the O-ring groove 16, the end straight pipe part 6a and the end part of the polygonal part 11 are inserted in the holes 15a, 15b, a circumferential wall of the end straight pipe part 6a corresponding to the O-ring groove 16 is expanded and swollen through the flaring, and the clearance between the base end fitting part 13 and the end straight pipe part 6a is sealed and engaged. The socket can be fitted to the tip of the pipe body with equivalent performance to that of the welding by a means other than welding.

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 tube has a stainless steel socket provided at the end of a stainless steel tube body having a corrugated portion, and a sprinkler head is attached to the unwinding tube end via this socket.

[0003]

The stainless steel socket is resistant to corrosion and has excellent durability, but is expensive in material and difficult to process, and makes the unwinding tube expensive. Therefore, even if an attempt is made to use an iron socket which is inexpensive in material and easy to process, welding of stainless steel and iron is almost impossible, and an iron socket cannot be used.

According to the present invention, an iron socket is attached to the tip of a stainless steel unwinding tube by means other than welding with equivalent performance, and a sprinkler head is attached to the unwinding tube end via the iron socket. It is an object of the present invention to provide a sprinkler head unwinding tube.

[0005]

In order to achieve the above object, a sprinkler head unwinding pipe according to the present invention is provided with an iron head joint for attaching a sprinkler head to one end of a stainless steel pipe main body having a wavy portion. The joint is provided with a hole that fits into the polygonal section of the tube body, and the O-ring groove for engaging a bulge formed by radially expanding and bulging the circular section of the tube body. It is provided in.

[0006]

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).

[0007] Further, in the figure, (5) is a multi-way joint for mounting a plurality of heads (2) at one end of the pipe (4), and 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 main body (8) provided with a straight pipe part (6) and a corrugated part (7) alternately, and a pipe main 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).

[0011] Then, the proximal 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, is inexpensive in material and can be easily processed as compared with a stainless steel socket, so that the product cost of the socket (9) can be extremely reduced and the socket (9) can be pulled and wound. 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 on the outer side of the end straight pipe portion (6b) on the side to be connected to the pipe (4), and a distal end 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 flared portion (21) formed at the end of the end straight pipe portion (6b). 27), and the outermost wavy portion (7a) on this side is brought into contact with the base end surface of the joint body (27) to form the flare portion (21) and the wavy portion (7b). The fitting 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 is fixed to 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 a base end rotatably fitted to the outer periphery of the fixed-side joint body (29) and 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 receiving portion (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 bodies (20), (27) and (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 cylinder (3) of the rotary 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), where (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-like pipe joint made of heat-resistant hard vinyl chloride is provided by being tightened similarly to 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 to 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.

[0029]

As is apparent from the above embodiments, the present invention provides a stainless steel pipe body (8) having a corrugated portion (7) at one end of an iron head joint (9) for mounting a sprinkler head (2). The head joint (9) is provided with a hole (15b) that fits into the polygonal section (11) of the pipe body, and the circular section (6a) of the pipe body (8) is radially expanded and expanded. O for engaging the bulging portion (19) formed by
A ring groove (16) is provided in the head joint (9), and the polygonal section (11) and the hole (15b) are fitted, and the bulging part (19) is engaged with the O-ring groove (16). The movement of the head joint (9) in the tube axis direction and the rotation in the circumferential direction are surely restricted by the head joint (9).
Can be mounted by means other than welding with the same performance as welding, and the cost of the unwinding pipe (3) can be significantly reduced.

[Brief description of the drawings]

FIG. 1 is an explanatory cross-sectional view of a sprinkler head mounting portion at the end of an unwinding tube.

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 synthetic resin rotary pipe joint at the base end of the unwinding pipe.

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]

 (2) Sprinkler head (3) Sprinkler head unwinding pipe (7) Wavy part (8) Pipe body (9) Head joint (11) Polygonal section (6a) Round section (15b) Hole (16) O-ring Groove (19) bulge

Claims (1)

[Claims] An iron head joint for attaching a sprinkler head is provided at one end of a stainless steel pipe main body having a corrugated portion, and a hole is formed in the head joint so as to fit into a polygonal section of the pipe main body. A sprinkler head unwinding tube, wherein an O-ring groove is provided in the head joint for engaging a bulging portion formed by bulging a circular section in a radial direction.