JP3309966B2 - Stand type connecting water pipe - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a stand-type connecting water pipe installed in a stand-alone state from the ground adjacent to a building for supplying water to an indoor fire hydrant or a sprinkler of a story building.

[0002]

2. Description of the Related Art The following two types of stand-type connecting water pipes used for fire fighting activities of fire brigades are known.

[0003] First, the first connecting water pipe shown in Figs. 16 and 17 is to cast a large diameter head pipe (2) separate from a pillar pipe (1) having a circular cross section, and to form a cast head pipe (2). ) Is added to the upper end of the support pipe (1) and fixed by welding in a communicating state, and is a pair of upper and lower water supply pilot holes projecting from the circumferential surface of the head pipe (2) by a fixed amount (X). The valve seat (5) of the check valve mechanism (4) is screwed into the mouthpiece (2a) from outside, and the connection base (6) further screwed into the valve seat (5) from outside. ), The fire hose connecting bracket (7) is also assembled and integrated.

[0004] Next, a second connecting water pipe shown in FIG. 18 has a separate head cover (12) at the upper end of a pillar pipe (11) having a circular cross section, and a separate small-diameter leg pipe (13) at the lower end. )
Are separately welded, and separate female screw cylinders (14) are respectively inserted into a pair of upper and lower water supply pilot holes (11a) perforated in the circumferential surface of the support pipe (11) by a predetermined amount (X). The valve seat (16) of the check valve mechanism (15) is also screwed into each of the female threaded cylinders (14) from the outside, and then fastened. A fire hose connecting bracket (18) is also assembled and integrated via a connection base (17) which is further screwed into the (16) from the outside.

[0005]

However, in the construction of the first connecting water pipe, however, a separate head pipe (2) is cast, welded to the support pipe (1), and a female screw is screwed to both mouthpieces (2a). Since the processing of (3) is required, the number of manufacturing steps of the connecting water pipe is increased, and not only the effect of mass production cannot be expected, but also because the head pipe (2) of the support pipe (1) becomes large and heavy, There is also a problem that the stability of the self-sustaining state is poor.

Further, a pair of upper and lower barrels (2a) serving as pilot holes for water supply project from the circumferential surface of the large diameter head tube (2) by a predetermined amount (X). Part (2a)
From outside through the valve seat (5) and the connection base (6)
Since the fire hose connecting fitting (7) is assembled and integrated, the amount (L) of the fitting (7) projecting from the circumferential surface of the support tube (1) is further increased.

[0007] In this regard, fire hose coupling bracket (7)
The size of the mouthpiece (2) is fixed in advance in correspondence with the fitting attached to the fire hose side.
The overhanging amount (L) of the receiving bracket (7) is increased by the predetermined amount (X) overhanging a).

[0008] Then, when turning work to screw-fasten the lower end portion of the support pipe (1) in the connecting water pipe to the water pipe buried in the ground, the turning radius of the connecting water pipe becomes large. Therefore, the water supply pipe and the connection water supply pipe must be installed at a position away from the wall surface of the building by an amount corresponding to the increase, and the installation space unnecessarily increases, which is not preferable.

On the other hand, in the construction of the second connection water pipe, it is necessary to prepare a pair of upper and lower female screw caps (14) separately, and a head cover (12) and a leg pipe (13) for the support pipe (11). In addition to the welding of the support pipe (11), both female screw caps (14) must also be welded to the circumferential surface of the support pipe (11). The drilling of 11a) is a three-dimensional complicated processing when laser processing is performed.
After all, the effect of mass production of connected water pipes cannot be exhibited.

Also, in the configuration of the second connecting water pipe, similarly to the first connecting water pipe, a pair of upper and lower female threaded cylinders (1) is provided.
4) protrudes from the circumferential surface of the support tube (11) by a predetermined amount (X), and is externally inserted into each of the female screw caps (14) via the valve seat (16) and the connection cap (17). Since the fire hose coupling receiving bracket (18) is assembled and integrated, a predetermined amount (X) of the female screw cylinder (14) protruding.
The receiving bracket (1) is separated from the circumferential surface of the support tube (11) by the
The overhang (L) of 8) becomes large, and the installation of the connecting water pipe is also restricted.

[0011]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and in order to solve the above-mentioned problems, a support pipe which is installed to be free standing from the ground is arranged at a certain height above the support pipe. As the flat front is plastically deformed, the cross section is almost D-shaped,
A pair of upper and lower pilot holes for water supply are formed in the flat front surface.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the specific structure of the present invention will be described in detail with reference to the drawings. In FIGS. (H) (for example, about 800 mm) and a diameter (D) (for example, about 114.3 mm), a support pipe made of a stainless steel pipe or another metal pipe.

[0013] (22) is a male screw cut at the lower end of the support pipe (21), which is fastened to a water supply pipe (23) buried in the ground (G) around the building, and the support pipe (23). 21)
The water is supplied to the indoor fire hydrant or sprinkler of the building through the water supply pipe (23). (24) is a decorative plate fitted on the support tube (21) so as to be able to move up and down freely.

Needless to say, the support tube (21) has a circular cross section, but only a certain height (H1) (for example, about 315 mm) at the upper portion of the support tube (21) as shown in FIGS. And a flat front (25a) depressed by a certain amount (X) (for example, about 24.58 mm) and a pair of left and right flat side faces (25b) facing each other, and are plastically deformed into a substantially D-shaped cross section.

That is, the constant width (W) of the flat front surface (25a) is almost equal to the diameter (D) of the support tube (21) itself, and the depth from the front surface (25a) to the arc-shaped rear surface (25c). The depth (S) is the depth depth (S1) of each side surface (25b).
(E.g., about 32.57 mm) and the radius (R) of the support tube (21) itself, as a total dimension, the support tube (2)
Check valve mechanism (V) to be described later on flat front (25a) of 1)
And the fire hose connecting bracket (A) can be assembled without any trouble, and the opening and closing slide stroke of the valve body in the check valve mechanism (V) is set to be sufficiently ensured.

However, as long as such a purpose can be achieved, the pair of left and right opposite side surfaces (25b) facing each other are not flattened, and a constant height (H) of the upper portion of the support tube (21) is maintained.
1) The portion may be plastically worked into a substantially D-shape larger than a semicircle in cross-sectional shape.

(26) is a head cover welded and integrated to the upper end of the support tube (21). In the illustrated example, the head cover is a flat stainless steel plate. However, the head cover may be raised to a convex shape. . (27) is a pilot hole for water supply which is also distributed as a pair of upper and lower openings that maintain a constant interval (h) (for example, about 175 mm) on the flat front surface (25a) of the support tube (21). It has an aperture (d) (for example, about 83 mm).

Since each of the pilot holes (27) for water supply is open at the flat front surface (25a), the holes can be easily and correctly drilled as simple two-dimensional processing with a laser.

A check valve mechanism (V) for sealing water filled inside the support pipe (21) is provided in each pilot hole (27) for water supply of the support pipe (21), and a fire pump car. And a connecting fitting (A) for a fire hose (not shown) extending from the unit, and are assembled and integrated as an entire unit.

That is, in FIGS. 6 to 9 showing this,
(28) is a diameter (for example, about 82.5 mm) that can be inserted from the outside into the pilot hole (27) for water supply of the support pipe (21)
A male screw (29) is provided on the outer peripheral surface of the insertion distal end portion, and a female screw (30) is provided on the inner peripheral surface of the insertion proximal end portion. A stopper flange (31) having a diameter (for example, about 96 mm) larger than the pilot hole (27) for water supply continuously projects from the insertion base end. (32) are a plurality of locking recesses for the rotating operation tool, which are cut out in the stopper flange (31).

A large lock nut (33) is screwed and fastened from the inside of the support tube (21) to the insertion end of the connection mouthpiece (28) inserted into the pilot hole (27) for water supply. With the lock nut (33) and the stopper flange (31) of the connection base (28),
The flat front surface (25a) of the support tube (21) is sandwiched and fixed from inside and outside. (34) is a watertight O-ring inserted between the flat front surface (25a) and the stopper flange (31).

In this case, in the illustrated example, the lock nut (33) is used.
Is formed as a disk, and a pair of locking flat surfaces (35) for the rotary operation tool facing the circumferential surface thereof are cut out. If the rotary operation tool (not shown) can be locked, the lock is used. Of course, the nut (33) may be formed into a common hexagon or other polygons.

Reference numeral (36) denotes a valve seat which forms a check valve mechanism (V) in combination with a valve body described later.
8) A small-diameter (for example, about 72.5 mm) distal-end screw mouth tube portion (36a) whose distal end is inserted from the outside to serve as a support base for the valve body. A large-diameter proximal end screw mouth tube portion (36b) serving as a support base of A) has an overall stepped form.

In addition, the small-diameter tip screw mouth tube portion (36)
A receiving flange (37) for seat packing attached to the valve element to be described later from the distal end position of a), and a receiving flange for a pawl seat to be described later from the proximal end position of the large-diameter proximal end screw mouth tube portion (36b). (38), all of which protrude inward (centripetal direction).

A male screw (39) and a female screw (40) are engraved on the outer peripheral surface and the inner peripheral surface of the small-diameter tip screw mouth cylinder portion (36a) in the valve seat (36). The male screw (39) is connected to the female screw (30) of the connection base (28).
The valve seat (36) is inserted and fastened from the outside to the connection base (28) so as to be screwed into the connection base (28). With respect to (40), the male screw (42) of the water supply division piece (41) is also screwed in from the outside.

On the other hand, the base portion (3) of the base screw port of the valve seat (36)
6b) has a diameter (e.g., about 9) substantially equal to the large-diameter stopper flange (31) projecting from the connection base (28).
1 mm), and its outer peripheral surface has external threads (43).
In addition, a watertight ring packing (44) having a substantially U-shaped cross section is fitted and integrated on the inner peripheral surface. (45) is a watertight O-ring inserted between the stepped portion of the valve seat (36) and the connection base (28).

As is clear from FIGS. 6 and 7, the water dividing piece (41) has a plurality of radially symmetrical water outlets (46), such as a three-pronged shape, and a column from the center thereof. A slide guide shaft for the valve body (4
7) are integrally protruded. The tip screw shaft portion (47a) of the slide guide shaft (47) is connected to the water supply division piece (4).
It is screwed into the screw hole (48) formed corresponding to the center of 1) from inside. (49) indicates a spring receiver formed to project from the head of the slide guide shaft (47).

Numeral (50) is a valve body which is slidably fitted on a slide guide shaft (47) as a disk type having a smaller diameter (for example, about 67 mm) than the diameter of the connection base (28). A watertight sheet packing (51) in contact with the valve seat (36) is pressed down on the outer surface by a pressing plate (52). The holding plate (52) is screwed to the boss portion of the valve body (50) from the outside, and a plurality of locking grooves (53) for turning operation tools are also cut out. I have.

Reference numeral (54) designates a conical compression coil spring wound between the flat inner surface of the valve body (50) and the spring receiver (49).
Is pressed against the valve seat (36) to give a back pressure that keeps the valve closed at all times. (55) is the valve body (50)
And a watertight O-ring inserted on the fitting surface of the slide-guide shaft (47).

As can be confirmed from the above description, the water supply division piece (41) in which the screw-end tube portion (36a) of the valve seat (36) is screwed to this, and the water supply division piece (41). 4
Since the valve body (50) that slides along the slide guide shaft (47) is supported via the slide guide shaft (47) that integrally projects from 1), the valve seat (50) is provided. 36) can be said to form a support base for a valve element in the check valve mechanism (V).

Further, (56) is a pawl seat which is juxtaposed in a state of being joined to the valve seat (36) having a large-diameter proximal end screw mouth cylinder portion (36b) from outside and (57) is a pawl seat (57) thereof. 56) provided on the circumferential surface as a radially symmetric distribution type (a total of 3
(58) is also the nail seat (56)
Large diameter (for example, about 8
(9.5 mm).

Numerals (59) denote pawls which are fitted into the respective pawl receiving notches (57) of the pawl seat (56), and all of the pawls receive the back pressure of the leaf spring (60) as shown in FIG. , Always project inward (centripetal direction) from the pawl seat (56). The pawl (59) and a leaf spring (60) for pressing and urging the pawl (59) are all provided with a pawl seat receiving flange (38) of the base screw barrel portion (36b) of the valve seat (36),
The pawl seat (56) is restrained in a sandwiched state between the pawl seat (56) and the restraining flange (58), and there is no possibility that the pawl seat (56) will fall off.

A large diameter (61) entirely surrounds the stopper flange (31) of the connection base (28), the proximal end screw barrel portion (36b) of the valve seat (36) and the claw seat (56). A female screw (62) engraved on the inner peripheral surface of the tightening ring is, for example, about 105 mm) into a male screw (43) of a base screw mouth tube portion (36b) forming the valve seat (36). It is screwed from the outside. Reference numeral (63) denotes a retaining flange protruding inward (centripetally) from the base end of the fastening ring (61). The retaining flange (58) presses the restricting flange (58) of the claw seat (56) from outside. become.

As is apparent from the above description, the base screw portion (36b) of the valve seat (36) incorporating the ring packing (44), the claw seat (56) and the plurality of claws (59) are provided. The receiving fitting (A) corresponding to the fitting (B) for connecting the fire hose is formed.

Moreover, since the fire hose connecting bracket (A) is screwed and fastened to the particularly proximal base screw mouth cylinder portion (36b) of the valve seat (36) by the fastening ring (61). It can be said that the valve seat (36) also functions as a support base for the bracket (A). That is, the fire hose coupling receiving fitting (A) and the check valve mechanism (V) are connected to the valve seat (3).
6) as a common support base, the connection base (28)
As a result, the support tube (21) is assembled into a flat front surface (25a) of the support tube (21) to form a unit.

A cap (64) covers the fastening ring (61) from outside, and (65) is a press ring for the cap (64), which is screwed and fastened to the outer peripheral surface of the fastening ring (61). ing. At the time of fire extinguishing activity, the cap (64) is broken, and the fitting (B) on the fire hose side extending from the fire pump truck is locked from outside to the hook (59) of the receiving fitting (A). Will be combined.

In the illustrated example, a synthetic resin cap (64) split by the fire brigade is shown, but a metal cap instead of this cap is fitted inside the fastening ring (61). It may be kept moored to the support tube (21) via a loss-prevention chain of a certain length.

The stand-type connecting water pipe according to the present invention has the above-described structure, and when assembling the same, the pilot hole (27) for water supply distributed in the opening in the support pipe (21).
By inserting a connection base (28) from the outside into each of the above, and screwing and fastening a lock nut (33) to the male screw (29) at the insertion tip from the inside of the support tube (21). The lock nut (33) and the stopper flange (31) of the connection base (28) are shown in FIGS.
As shown in 2, the support tube (21) is sandwiched and fixed to the flat front surface (25a) of the support tube (21).

On the other hand, as is apparent from FIG.
A water supply section piece (41) is screwed and fastened to the small-diameter screw-end cylindrical portion (36a) of (6) in advance, and the valve is moved to a slide guide shaft (47) for a valve body that projects integrally therefrom. Body (50)
And its back pressure applying coil spring (54) are also properly assembled, and the large diameter base end screw mouth cylinder portion (36b) of the valve seat (36) is also fitted with a fire hose connecting bracket (A) in advance. ) Are also assembled in a proper state by screwing the fastening ring (61) into the male screw (43) of the base screw mouth cylinder (36b). Keep it.

Then, the small-diameter screw-end cylindrical portion (36a) of the valve seat (36) in the assembled state of FIG. 13 is externally inserted into the female screw (30) of the connection base (28). What is necessary is just to screw-fasten to a state and to complete assembly as shown in FIG.

Then, the front (25) of the support tube (21)
Since a) is a flat surface depressed by a certain amount (X) from the initial circumferential surface of the support pipe (21), when the size of the fire hose coupling receiving bracket (A) is assumed to be constant. The connection water pipe is installed in such a state that the fixed amount (L) of the receiving fitting (A) projecting from the support pipe (21) can be suppressed as small as possible, and the opening and closing slide stroke of the valve body (50) is secured. The space can be kept as small as possible, and it can be installed in a positional relationship as close as possible to the wall of the building.

Because the front surface (25a) of the support tube (21) is plastically deformed to be flat, the connection base (28) and the lock nut (33) are sandwiched between the front surface (25a) and furthermore, The space between the stopper flange (31) of the connection base (28) and the front surface (25a) of the support tube (21) can be reliably sealed by inserting a watertight O-ring (34). That is.

FIG. 14 shows a use state in which the fire hose connecting piece (B) corresponding to the fire hose connecting fitting (A) of the connecting water pipe according to the present invention is inserted and connected. In use, the nail (59) of the nail seat (56)
Is locked to the fitting (B) by the restoring force that once expands, and the watertight action with the fitting (B) is performed via the ring packing (44) attached to the valve seat (36) in advance. Achieved.

Also, in the use state of FIG. 14, the valve body (50) of the check valve mechanism (V) receives the water pressure from the fire pump truck and opens from the valve seat (36). Since the compression coil spring (54) is wound around the back surface of the valve body (50), and there is no restriction surrounding the back surface, the required amount of water per hour can be supplied without any trouble. . Reference numeral (66) in FIG. 14 denotes a push ring for releasing the locked state between the fitting (B) and the receiving fitting (A), and (67) denotes a snap ring thereof. It goes without saying that the outer peripheral surface of B) is fitted in advance.

Further, the flat front (25) of the support tube (21)
a) a large stopper flange (31) of a connection base (28) inserted into the pilot hole (27) for water supply, and a lock nut (3) screwed into the connection base (28).
Since it is designed to be pinched and fixed by 3),
The strut pipe (21) can be applied as it is not only to the connecting water supply pipe but also to the connecting water sampling pipe as shown in FIG. 15, and is excellent in versatility.

That is, as is apparent from FIG. 15, a large-diameter locking flange (68) is provided from the outside for the female screw (30) of the connection mouthpiece (28) instead of the upper valve seat (36). And a fastening ring (7) with a handle (70) to its locking flange (68).
By assembling the inward locking flange (72) of 1) in a state where it can be prevented from coming off, it is possible to finish as a connected water sampling pipe that reversely samples water from the inside of the support pipe (21). (73) is a female screw of the fastening ring (71), (7)
4) denotes a watertight O-ring interposed between the connection base (28) and the suspension fitting (69), and (75) denotes a watertight ring packing.

[0047]

As described above, in the stand-type connecting water pipe according to the present invention, the support pipe (21) installed in a self-standing state from the ground (G) is fixed to the upper part of the fixed height (H1). The flat front face (25a) is plastically deformed and has a substantially D-shaped cross section, and a pair of upper and lower water supply pilot holes (27) are formed in the flat front face (25a). This has the effect of improving all the problems of the prior art described.

That is, according to the above-described structure of the present invention, the flat surface (25a) of the support tube (21) is depressed by a fixed amount (X) from the initial circumferential surface of the support tube (21). None, where a pilot hole (27) for water supply for assembling the check valve mechanism (V) and the fire hose connecting bracket (A) is formed, so that the installation space for the connection water pipe is minimized. As a result, it can be installed as close to the wall of the building as possible.

Also, in the manufacturing method, a flat front surface (25a) can be formed by plastic working of the support tube (21), and the water supply pilot hole (27) can be formed in the front surface (25a). Since it can be performed by a simple two-dimensional laser processing, there is no need for troublesome welding at a plurality of places as in the related art and preparation for manufacturing a separate head tube (2) or a female screw tube (14). Together with this, the mass production effect can be maximized.

Further, since the front surface (25a) of the support tube (21) is plastically deformed as a flat surface, the structure of claim 2 can be adopted, and the watertight O-ring (3) can be used.
4), the front surface (25) of the support tube (21) is inserted.
a) and the stopper flange (31) of the connection base (28)
Has the effect of being able to rationally seal the gap between them.

In particular, if the configuration of claim 3 is adopted,
By screwing and fastening the valve seat (36) to the connection base (28), it functions as a support base common to the check valve mechanism (V) and the fire hose connecting bracket (A),
The valve body (50) of the above-described check valve mechanism (V) is provided on the tip screw mouth cylinder portion (36a) of the valve seat (36), and the valve seat (3) is also provided.
The receiving fitting (A) can be efficiently assembled into a unit at the base screw mouth tube portion (36b) of 6), and the practicality is remarkably excellent.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a schematic whole of a stand-type connecting water pipe according to the present invention.

FIG. 2 is a side sectional view of FIG.

FIG. 3 is an oblique view showing a column pipe of the connecting water pipe extracted.

FIG. 4 is a side sectional view of FIG. 3;

FIG. 5 is an enlarged sectional view taken along line 5-5 in FIG.

FIG. 6 is an enlarged sectional view taken along line 6-6 in FIG. 2;

FIG. 7 is a sectional view taken along line 7-7 of FIG. 6;

FIG. 8 is a sectional view taken along line 8-8 in FIG. 6;

FIG. 9 is a sectional view taken along line 9-9 of FIG. 6;

FIG. 10 is a sectional view showing a corresponding positional relationship between a connection base and a lock nut with respect to a front surface of a support tube.

FIG. 11 is a sectional view corresponding to FIG. 10 and showing a fastening state between the connection base and the lock nut.

FIG. 12 is a front view of FIG. 11;

FIG. 13 is a cross-sectional view showing an assembled unit state of a check valve mechanism and a fire hose coupling receiving bracket with respect to a valve seat.

FIG. 14 is a cross-sectional view showing a use state in which a connecting water pipe is opened.

FIG. 15 is a cross-sectional view showing the present invention applied and embodied as a connected water sampling pipe.

FIG. 16 is a front view showing a conventional stand-type connecting water pipe.

FIG. 17 is an enlarged side sectional view of FIG. 16;

FIG. 18 is a side sectional view showing another conventional stand-type connecting water pipe.

[Explanation of symbols]

 (21) ・ Prop pipe (23) ・ Water supply pipe (25a) ・ Front (25b) ・ Side (25c) ・ Back (27) ・ Prepared hole for water supply (28) ・ Connection base (31) ・ Stopper flange (33) -Lock nut (34)-O-ring (36)-Valve seat (36a)-Tip screw mouth cylinder (36b)-Base screw mouth cylinder (41)-Water supply division piece (44)-Ring packing (47)・ Slide guide shaft (50) ・ Valve (54) ・ Compression coil spring (56) ・ Claw seat (59) ・ Claw (61) ・ Tightening ring (64) ・ Cap (A) ・ Fire hose connecting bracket (H1) ) ・ Constant height (G) ・ Ground (S) ・ Depth (V) ・ Check valve mechanism

Claims (3)

(57) [Claims] 1. A strut tube (21) installed in a self-supporting state from the ground (G) is substantially D-shaped in cross section, in which a flat front surface (25a) is plastically deformed to a predetermined height (H1) at an upper part thereof. A stand-type connecting water pipe, wherein a pair of upper and lower water supply pilot holes (27) are formed in the flat front surface (25a) as a mold. 2. A connection base (28) formed with a large-diameter stopper flange (31) projecting from the outside into a pilot hole (27) for water supply of a support tube (21), and the connection base (28). A lock nut (33) is screwed and fastened from the inside of the support tube (21) to the insertion end of the support tube (2), and the support tube (2)
1) The flat front (25a) of the lock nut (3)
3) and stopper flange (31) of connection base (28)
And that a watertight O-ring (34) is inserted between the stopper flange (31) of the connection base (28) and the flat front surface (25a) of the support tube (21). The stand-type connecting water pipe according to claim 1, characterized in that: 3. A valve seat (36) screwed into the connection mouthpiece (28) from the outside of the support tube (21) as a common support base, and the tip end of the valve seat (36) has a small diameter. Part (36
a) a valve body (50) forming a check valve mechanism (V), and a fitting (A) for connecting a fire hose to a large-diameter proximal screw port cylinder part (36b) of the valve seat (36). 3. A stand-type connecting water pipe according to claim 2, wherein the water pipe is formed as an assembly unit.