JP2840016B2 - Connection structure of distribution header for fire extinguishing piping - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a distributed header for fire extinguishing piping.
Connection structure in which a connection pipe is connected to the branch connection part of
Things.

[0002]

BACKGROUND ART For example, when explained as an example extinguishing equipment with sprinkler, conventional piping system for this type of fire extinguishing equipment has been piped to the ceiling portion, is basically the pipe in the ceiling portion space The main pipe, a distribution header attached to the main pipe, and a flexible connecting pipe having flexibility for connecting between the sprinkler head mounted on the ceiling plate and the distribution header.

As shown in FIGS. 9 and 10, basically, a conventional distributed header 101 of this type has a connection portion 102 having a threaded inner periphery serving as a portion connected to a main pipe.
And a branch connection part 104 provided around the lower side surface of the connection part 102 and connected to the flexible pipe 103 for connection, which is threaded on the outer periphery.
Usually, the branch connection portions 104 are provided at six locations at equal intervals.

On the other hand, as shown in FIG. 9, a flexible tube 103 for connecting one end of the dispersion header 101 to the dispersion header 101 is provided with a rigid tube-like connecting member 106 on a flexible tube 105. A nut 107 for tightening is provided on the outer periphery of the connecting body 106. When the flexible pipe 103 is connected to the branch connection section 104 of the distribution header 101, as shown in FIG.
The nut body 107 was turned so as to be screwed on the outer periphery of the branch connection portion 104.

[0005]

However, the above-mentioned conventional distributed header 101 has an extremely complicated form as can be seen from the drawing, and therefore has to be manufactured by casting. Therefore, the production is troublesome and the cost is high. Moreover, the connecting portion between the flexible pipe 103 and the branch connecting section 104 itself has no flexibility at all, which makes it difficult to perform piping work that exceeds the flexibility of the flexible pipe 103 itself, and limits the piping layout of the ceiling. I was receiving it. In addition, since the connection portion between the flexible tube 103 and the branch connection portion 104 is not flexible, the fixing portion between the tube 105 and the connection body 106 is often overloaded, and cracks may be caused therefrom. There was also.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and is a fire extinguisher piping distribution header which can be easily manufactured from commercially available steel pipes or unnecessary pipes and has a certain degree of flexibility at a connection portion. The purpose of the present invention is to solve the above-mentioned problem by providing a connection structure .

[0007]

According to a first aspect of the present invention, a branch header for a fire-extinguishing piping distribution header is provided.
A connection structure in which a connection pipe is connected to a connection portion,
Dispersion header for fire extinguishing piping is closed at one end of pipe material.
Multiple through holes are drilled on the outer circumference of the tube, and one end is tapered
The other end of the tubular body having a flange opening in the shape of
The connecting tube is fixed to an edge, and has a flexibility.
At the outer circumference of one end of the tubular body, an annular
There is no ball seat that has the
Ball seat with an O-ring attached to the recess
And the flange of the pipe of the fire-extinguishing piping distribution header
From the outer periphery of the collar and the ball seat.
It is characterized by the fact that the jing material is covered and tightened
The present invention provides a connection structure for a distribution header for fire extinguishing piping .

[0008] According to the second aspect , the dispersion for fire extinguishing pipes
Connection structure with a connecting pipe connected to the branch connection
In the fire-extinguishing piping distribution header, one end of the pipe material
The pipe is closed, and a plurality of through holes are formed in the outer periphery of the pipe.
The other end of the tubular body having a tapered flange at the end
Is fixed to the periphery of each through-hole, the connecting pipe,
A flexible outer tube is provided around the outer periphery of one end of the tube.
While being fixed, an annular groove is formed on the inner periphery of the tube.
Bellows shaped to be inserted into the outer tube
One end of the inner tube is expanded with respect to the annular groove.
And one end of the inner tube is fixed to the tube.
A ring for mounting an O-ring is provided around the outer periphery of the other end of the tube.
A ball seat is provided that has a dent-like portion that faces outward in the axial direction.
With the O-ring attached to the recess
And a flange portion of the pipe of the dispersion header for the fire extinguishing pipe
From the outer circumference of the collar and the ball seat.
The appropriate housing material is covered and tightened
Dispersion header connection structure for fire extinguishing piping provided
Is done. Fix one end of the inner tube to the tube
Swelling and fixing with an O-ring interposed
You may.

[0009] In these cases, the collar portion includes a collar portion and a tubular body.
And one end of the tube is expanded and formed.
You may comprise a collar part. Dispersion for fire extinguishing piping
A square tube may be used for the tube material serving as the main body of the header.

[0010]

[0011]

[0012]

[0013]

According to the first aspect, the pipe material serves as the main body of the fire extinguishing pipe distribution header, the other end of the pipe material serves as a connection portion with the main pipe, and the pipe body having the flange serves as a branch connection portion. As described above, since all are constituted by pipes, it is possible to manufacture with commercially available steel pipes or unnecessary pipe materials. The collar constitutes one component of the joint connection. And dent
With the O-ring attached to this ball seat and the fire extinguishing pipe
Butt of the pipe of the distribution header for
Appropriate housing material is covered from the outer periphery of the flange and the ball seat.
The connection
Watertight by an O-ring between the collar and this ball seat
With a flange having a tapered opening while ensuring
Adequate flexibility is secured by abutment with the ball seat
You. Such connections should be made by tightening the appropriate housing material.
The housing material.
Easy connection and disconnection by attaching and detaching
It can be done quickly.

According to the second aspect, in addition to the above-mentioned functions and effects,
The inner tube into the annular groove formed on the inner circumference of the tube.
The tube is swelled and fixed, so use means such as welding.
In any case, for example, the inner
-The tube can be fixed to the tube.

As described above, one end of the tube is enlarged in diameter.
If the flange is formed by molding, the number of members can be reduced.
As well as being easy to manufacture. This expanding process
For example, take a Belling process
be able to. Also serves as the main body of the distributed header for fire extinguishing piping
If a square tube is used for the pipe material, the overall strength will improve.
In both cases, it is easy to fix the pipe that constitutes the branch connection part to the pipe material
And a firm fixation. And with an O-ring in between
By swelling and fixing, the inner tube and tube
Watertight fixation with the inner circumference of the body is easily achieved.

[0016] On the other hand, according to the flexible pipe coupling according to claim 4, and as the ball seat by mounting an O-ring recess, abutting a flange portion of the fire extinguishing piping dispersion header pipe body Then, an appropriate housing material may be placed over the outer circumferences of the collar portion and the ball seat portion, and then tightened as it is. Then, the O-ring between the collar portion and the ball seat portion ensures watertightness, and also ensures appropriate flexibility by abutting the collar portion having the tapered opening and the ball seat portion. Further, since such a connection is realized by tightening an appropriate housing material, connection and separation can be easily and quickly performed by tightening or loosening the housing material.

According to the connecting flexible pipe according to the fifth aspect, in addition to the above-mentioned effects, the inner tube is swelled and fixed in the annular groove formed on the inner periphery of the pipe body. The inner tube can be easily fixed to the tube by, for example, bulging work without using means such as welding.

According to the sixth aspect, since the swelling and fixing are performed with the O-ring interposed, the watertight fixing between the inner tube and the inner periphery of the tube can be easily realized.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a partial cross-sectional view of a fire extinguishing pipe distribution header 1 used in this embodiment, and FIG. FIG. 2 is a sectional view taken along line BB in FIG. 1, and a main body 2 is configured by cutting a commercially available square tube into a predetermined length. Both ends of the main body 2 are formed in a ring shape at the portions indicated by the hatched portions in FIG. 1 by shrink fitting or appropriate press forming, for example. A substantially tapered connection member 3 whose outer periphery is threaded for connection to the main pipe is fixed to the annular portion at one end by welding, and a cap 4 is fixed to the annular portion at the other end by welding. It is closed.

On the outer periphery of the main body 2 having such a configuration, branch connectors P _{1 to} F ₆ are provided at a total of six locations. There are a total of four setting locations, one on each of the four outer peripheral surfaces near the cap 4, and two on the opposite surface on the outer periphery near the connecting member 3. Of course, as indicated by the chain line in FIG. 1, also provided respectively P ₇ to P ₈ in the other of the opposed surfaces of the outer periphery of the connecting member 3 closer, like the outer periphery of the cap 4 near, the outer periphery of the connecting member 3 closer A total of eight branch connectors P _{1 to} P ₈ may be provided as a total of four locations, one location on each of the four sides. In this way extinguishing dispersion header of the present invention, it is easy to increase or decrease the number of branching connection body as needed.

Since the respective branch connectors P _{1 to} P ₆ have exactly the same configuration, the configuration of the branch connector P ₁ will now be described. The branch connector P ₁ may be a commercially available steel pipe or an unnecessary pipe. Is cut into a predetermined length to form a branch connection pipe 11, which is further provided on the outer circumference of one end of the branch connection pipe 11.
It has a configuration in which a flange portion 12 that is opened in a tapered shape is fixed. The collar portion 12 is also obtained by cutting a commercially available steel pipe or the like into a predetermined length and subjecting one end of the collar portion to a diameter-expanding process.

A branch connection pipe 1 is provided at a predetermined position of the main body 2.
A through hole 13 having the same diameter as the inner diameter of the through hole 1 is formed.
Branching connection body P ₁ by fixing the other end of the branch connection tube 11 by welding the peripheral portion of 3 is formed. Constructed in the same manner also other branching connection body _P 2 to P _6.

On the other hand, the connecting flexible pipe which is connected in a water-tight manner to each of the branch connectors P _{1 to} P ₆ of the distributed header 1 according to the above configuration has the configuration shown in FIGS. . That is, the connecting flexible pipe 21 used in this embodiment is used.
Is such that an inner tube 24 having a bellows shape is fixed watertight between the inner periphery of one tube 22 and the inner periphery of another tube 23, and the outer periphery of the inner tube 24 is covered with the inner tube 24. The outer tube 25 is passed between the outer circumferences of the tube 22 and the tube 23, and the outer tube 25
Are fixed to the outer circumferences of the pipes 22 and 23 by annular outer bands 26, respectively.

The inner tube 24 is fixed to each inner periphery of the tube 22 and the tube 23 by bulging. That is, first, the annular groove 22 is formed on the inner periphery of each of the pipe bodies 22 and 23.
a and 23a are formed, and then the inner tube 2 is formed.
An annular O-ring mounting groove is formed on the outer periphery of the portion corresponding to the annular grooves 22a and 23a in 4, and the O-ring 27 is mounted in each of the O-ring mounting grooves. Then, both ends of the inner tube 24 in that state are respectively connected to the respective tubes 2.
2 and 23, and then the inner tube 24
Are bulged toward the inner peripheral walls of the tubes 22 and 23 by bulging. Then, while the O-ring 27 is pressed, the O-ring mounting groove portion is
The inner tube 24 is extruded into the inner tubes 24 and 23a, thereby fixing the both ends of the inner tube 24 to the inner periphery of the tubes 22 and 23, respectively.

On the outer periphery of the other end of the tube 22, a ball seat portion 29 having an annular concave portion 28 is fixed outwardly. A flange portion 30 is provided by forming a diameter of the end portion.

The connecting flexible pipe 2 used in this embodiment
1 is constructed as described above, then the connecting flexible tube 21, a case of pre-connection on the outlet dispersion header 1 of example branching connection body P _1, FIG. 5 is explained with reference to FIG. 6, First, the ball seat 2 of the connecting flexible pipe 21
After mounting the O-ring 31 to 9 in the recess 28, the flange portion 12 of the branch connection body P ₁ opposed to said spherical base portion 29, from the outside of the flange portion 12 and the ball seat 29, two half Housing 3 constituted by split semicircles 32, 33
Put 4 on. After that, these half halves 32, 33 are tightened with bolts 35 and nuts 36, and
Only need to be fixed.

To explain in more detail, first, the half-semicircle 3
Reference numerals 2 and 33 have exactly the same structure and are manufactured by press molding. The clamp portions 3 having ribs 37 on both sides are provided at both ends of the half-semicircle 32, respectively.
8 and 39 are integrally formed, and a clamp portion 39 at one end is further formed.
Is provided with a through hole for inserting the bolt 35. Clamps 41 and 42 having ribs 40 on both sides are integrally formed at both ends of the other half-semicircle 33, and a through hole for inserting the bolt 35 is also formed at the clamp 42 at one end. Has been pierced. The half-semicircles 32 and 33 have exactly the same configuration up to this configuration. On the outer end surface of the clamp portion 42, the protruding nut 3
6 is fixed by welding.

A half-semicircle 3 according to the above configuration
2 and 33 are hingedly connected by a leaf spring 43. That is, a leaf spring 43 having a substantially M-shaped cross section is fitted so as to straddle each of the clamp portions 38, 41 of each of the half-half bodies 32, 33, and each of the half-half bodies 32, 33 is hinged. I have. The leaf spring 43 urges the half-semicircles 32 and 33 in the direction of clamping, so that the housing 34 hinged as described above is moved outside the collar 12 and the ball seat 29. Holdability when covered is good, and workability is also good.

After covering the housing 34 on the outside of the collar portion 12 and the ball seat portion 29 as described above, the bolt 35
Of the housing 3 by screwing the
4 is completed. In this manner, a series of tightening and fixing operations of the housing 34 can be performed very quickly and easily.

As described above, the watertightness of the connected connection portion is ensured by the O-ring 31 interposed between the collar portion 12 and the ball seat portion 29 and pressed by both. Until the edge of the collar 12 abuts against the inner peripheral wall of the housing 34, the connection is flexible. Therefore, compared to this type of connection portion in the above-described conventional distributed header, when a connecting flexible pipe having the same flexibility is connected, the connection portion has flexibility, so that the entirety is higher than before. Large flexibility as
This type of connecting flexible pipe has a high degree of freedom when connecting to a sprinkler head.

Further, the flexibility of the connecting flexible tube 21 itself is ensured by an inner tube 24 having a bellows shape at an intermediate portion, and the inner tube 24 is fixed to the tube 22 by a simple bulging. Since the swelling is fixed, the reliability is high, and the piping work is extremely easy, in combination with the flexibility of the connecting portion.

Although the above-mentioned distributed header 1 is provided with _six branch connectors P _{1 to} P ₆ , the number of connecting flexible pipes 21 to be connected for construction is smaller than that, and therefore unnecessary branch pipes are provided. When it is necessary to close the connection body, this can be easily done on site by using the closing cap 51 shown in FIG.

The closing cap 51 has a construction in which a spherical seat 52 having the same shape and the same size as the spherical seat 29 of the flexible connecting tube 21 is fixed to the outer periphery of the open end of the cylindrical body having one end closed. The ball seat 52 of the closing cap 51
When, O ring 54 is interposed butt them together, similar to the connection of the connecting flexible tube 21 to a branch connection body P _1, these ball seat between the flange portion 53 of the branch connection body P to be closed The housing 34 may be fastened and fixed from the outside of the flange 52 and the flange 53. Therefore, such a closing operation can be performed easily and quickly on site.

[0034] An example manner of the above sprinkler for fire extinguishing pipe with dispersion header 1 and connecting the flexible tube 21 shown in FIG. In the figure, reference numeral 61 denotes a main pipe. In forming the main pipe 61, it is possible to use the aforementioned butting of the collar portion and the ball seat portion and the fastening connection by the housing.

Further, since the collar portion 30 is provided on the outer periphery of the tube body 23 at one end of the connecting flexible tube 21 as described above, even when the splicer head 62 is connected to the sprinkler head 62, Ball seat 2
If a ball seat similar to 9 is provided, the same connection method as described above can be employed, and flexibility can be obtained also at this connection portion. Therefore, the work becomes extremely easy as a whole.

For the corrosion prevention of the pipes 22 and 23 of the dispersion header 1 and the connecting flexible pipe 21, for example, resin lining is applied to the inner peripheral wall of the pipe,
It is preferable to apply Kanigen plating. This makes it possible to reliably prevent corrosion due to, for example, a natural electrode potential difference. In such a case, for example, a portion fixed by a bulging process such as bulging does not damage the resin lining or the Kanigen plating, so that extremely durable anticorrosion can be obtained.

[0037]

According to the first aspect, the connecting portion itself is flexible.
Because of this, the tolerance for flexibility is greater than before,
Workability is good and the layout is free.
The degree is also improved. In addition, such connection
This is achieved by tightening the housing material.
Easy and quick connection and separation for good on-site workability
is there. In addition, there is no need for a commercial steel pipe or a distributed header for fire extinguishing piping.
It is possible to manufacture with simple tubing,
It is easy and the cost can be reduced.

According to the second aspect, in addition to the above effects, the melting
You can easily connect the inner tube without using any means
It can be fixed to the body. Moreover, the signal of the fixed part
Reliable, damaging corrosion protection on the inner surface of the tube
Never.

[0039]

[0040]

[0041]

[0042]

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional side view of a distribution header used in an embodiment.

FIG. 2 is a sectional view taken along line BB in FIG.

FIG. 3 is a side view of a connecting flexible pipe used in an example.

FIG. 4 is a side cross-sectional view of a connecting flexible tube used in an example.

FIG. 5 is a side sectional view of a main part showing a connection state between the distribution header and the connecting flexible pipe according to the embodiment.

FIG. 6 is an axial front view of a housing used for a connection structure between the distribution header and the connection flexible pipe according to the embodiment.

FIG. 7 is a side sectional view of a main part showing a connection state of a closing cap.

FIG. 8 is a perspective view showing a state in which piping is connected to a sprinkler head using the connection structure between the distribution header and the connection flexible pipe according to the embodiment.

FIG. 9 is a plan view of a distributed header according to the related art.

FIG. 10 is a sectional view taken along line AA in FIG. 9;

[Explanation of symbols]

1 dispersed header 2 body 11 branch connection pipe 12 flange portion 13 22, 23 the tube 24 inner tube through holes 21 connecting the flexible tube 25 outer tube 27 O-ring 28 recessed portion 29 ball seat 31 O-ring 34 housing P ₁ to P ₆ branch connection

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) A62C 35/00-35/68 F16L 23/04-41/02

Claims (2)

(57) [Claims] 1. A distribution header for a fire-extinguishing piping distribution header.
In a connection structure in which a connecting pipe is connected, the fire extinguishing pipe distribution header has one end of a pipe material closed,
A plurality of through holes are formed in the outer periphery of the tube material, and the other end of a tube body having a flange portion which is tapered at one end is fixed to the periphery of each through hole . Outer circumference of one end of a flexible tubular body
The annular recess for mounting the O-ring in the axially outward direction.
And a ball seat having an O-ring mounted on the recess.
The flange part of the pipe body of the distribution header for fire piping is abutted,
Appropriate housing material is provided from the outer periphery of the collar and the ball seat.
A connection structure for a distribution header for a fire extinguishing pipe , which is covered and fastened . 2. A connection to a branch connection of a fire-extinguishing pipe distribution header.
In a connection structure in which a connecting pipe is connected, the fire extinguishing pipe distribution header has one end of a pipe material closed,
A plurality of through holes are formed in the outer periphery of the tube material, and the other end of a tube body having a flange portion which is tapered at one end is fixed to the periphery of each through hole . A flexible outer tube is a tube
It is fixed to the outer circumference of one end of the body, and
An annular groove is formed and inserted into the outer tube
One end of the bellows-shaped inner tube is
One end of the inner tube swelled with respect to the groove
Is fixed to the tube, and an O-ring is provided around the other end of the tube.
With a ring-shaped recess for mounting
A ball seat having an O-ring mounted on the recess,
The flange part of the pipe body of the distribution header for fire piping is abutted,
Appropriate housing material is provided from the outer periphery of the collar and the ball seat.
A connection structure for a distribution header for a fire extinguishing pipe , which is covered and fastened .