JP3050968B2 - Piping structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a piping structure, for example, used for indoor drainage piping.

[0002]

2. Description of the Related Art Water pipes such as drain pipes are required to have corrosion resistance against fluid in the pipes. Particularly, in indoor pipes of high-rise buildings, they are excellent due to strict earthquake resistance and a large construction area. Workability is required.

[0003] As a pipe capable of satisfying the anticorrosion property, an inner resin-coated steel pipe in which a vinyl chloride resin pipe is bonded to the inner face of a steel pipe with an adhesive is known. Also, as shown in FIG. 4A, a pipe end is inserted into the end inner surface as a pipe joint which can connect the inner resin-coated steel pipe while maintaining its inner corrosion resistance and with excellent seismic resistance. The end 21 ′ of the inner resin-coated steel pipe 2 ′ is inserted together with the packing 3 ′ into the pipe end insertion groove 11 ′ of the pipe joint body 1 ′ having the groove 11 ′, and is inserted through the pipe 2 ′ in advance. The packing push plate 3 'is fastened to the fixed flange portion 12' at the end of the pipe joint body by bolts 5 ', and the protruding end 31' of the packing 3 'from the pipe joint body 1' is pressed by the packing push plate 4 '. Is known.

In this pipe joint, a hook portion 3 surrounding an inner resin-coated steel pipe end face 20 'is provided at the tip of a packing 3'.
0 'is formed, and this key portion 30' forms the same end surface 20 '.
Has a structure that prevents direct contact with drainage and is less likely to rust. In addition, construction is simple because of the packing fastening system.

[0005] In indoor piping, particularly in indoor drainage piping, a cross-shaped branch portion may be assembled by connecting a T-shaped fitting or a Y-shaped fitting, or a bent portion having a large bend angle may be assembled to connect a bend fitting. Yes, when using the pipe joint shown in the above figure, as shown in FIG.
Left and right ends 2 of cut short pipe 20 ″ of inner resin-coated steel pipe
A packing 3 'and a packing push plate 4' are provided between 1 ", 21" and the groove 11 'for inserting a pipe end at one end of each fitting body 1'.
And bolts 5 '.

[0006]

In view of the installation space of the cross-shaped branch portion and the bent portion, the short pipe 2 "has a minimum length (the width required for inserting the left and right insertion allowances and the central suspension band). Therefore, it is difficult to provide a sufficient space between the packing push plates 4 ', 4', and the bolts 5 ', 4'
… Tightening work becomes difficult, and there is also a problem in workability.

An object of the present invention is to assemble a cross-shaped branch portion by connecting T-shaped pipe joints or Y-shaped pipe joints, or assemble a bent portion having a large bend angle to connect a bend pipe joint. An object of the present invention is to provide a piping structure capable of easily assembling a mold branching portion and a bent portion with excellent mechanical strength and sufficiently compactly.

[0008]

The pipe structure of the present invention has a pipe end insertion groove on the inner surface of the end, and a pipe joint body into which the pipe end is inserted together with the packing, and the pipe joint body. In the middle of the piping structure in which the pipes are connected to each other by a pipe joint having a push plate that is fastened to an end by a bolt and presses the rear end of the packing, the pipe end is inserted into a pipe end insertion groove on one end side. Each of the right and left halves of the short pipe having a flange in the center is inserted together with the packing into the pipe end insertion groove at the other end of each of the pipe joint bodies connected by the packing, the push plate, and the bolts. Wherein the other end of the pipe joint body is fastened with a bolt and the rear end of each packing is pressed on each side surface of the flange.

[0009]

[Function] The packing between each fitting body and each half of the short pipe is tightened by the tightening force of a bolt for fastening between the fitting bodies, and a packing push plate is required to tighten these packings. Therefore, the interval between the two main pipes of the joint can be narrowed, and the bolt can be easily tightened even with the narrow interval. In addition, the number of parts can be reduced, and labor can be saved in construction.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. The configuration of the connecting portion between the pipes in the piping structure of the present invention is substantially the same as the above-described conventional configuration, and as shown in FIG.
The end 21 of the inner resin-coated steel pipe 2 is inserted together with the packing 3 into the pipe end insertion groove 11 of the pipe fitting main body 1 having the pipe fitting 11, and the packing push plate 4 previously inserted through the pipe 2 is connected to the pipe fitting main body end 1. Of the packing 3 is pressed by the packing push plate 4 at the projecting end 31 of the packing 3 from the pipe joint body 1.

In the piping structure according to the present invention, a T-shaped branch pipe joint, a cross-shaped branch section formed by connecting Y-type branch pipe joints, and a bent section having a large bend angle formed by connecting bend pipe joints are formed. FIG. 1 (b) shows the structure of the connecting portion of the pipe joints.

In FIG. 1 (b), reference numeral 1 denotes a pipe joint body, like the above-mentioned pipe joint body, having grooves 11 for inserting pipe end portions on inner surfaces at both ends, and fixing flanges 1 on both outer surfaces.
2, 12 are projected, and the flange 12 is provided with a bolt insertion hole. 6 is a plastic short tube,
It has a flange portion 61 at the center, and the flange portion 61 has
A bolt insertion hole is provided similarly to the fixing flange 12 at the end of the pipe joint body. Reference numeral 3 denotes a packing, and the same packing as that described above is used.

Reference numerals 62, 62 denote left and right halves of the short tube 6, respectively.
Each of these halves 62 is inserted into the pipe end insertion groove 11 on one end side of each pipe joint body 1 together with the packing 3, and the rear end 31 of each packing 3 is projected from each pipe joint body 1, and each of these packings 3 has a rear end 31 at the center flange 6 of the short pipe 6
1 is in contact with each side surface.

Reference numeral 5 denotes a bolt, which is passed through a bolt insertion hole of a central flange 61 of the short pipe 6 to fasten the fixing flanges 12 at the ends of the two joint bodies, and to each side of the central flange 61 of the short pipe 6. , The rear end 31 of each packing 3 is pressed and each packing 3 is tightened.

In FIG. 1B, reference numeral 2 denotes a pipe.
An inner resin-coated steel pipe is used, and is connected to the other end of each pipe joint main body 1 by a packing, a packing push plate, and bolts as in (b) of FIG.

In FIG. 1B, reference numeral 7 denotes a suspension bolt. As shown in FIG. 2A, a screw hole fitting 63 embedded in the central flange 61 of the short tube 6 or FIG. As shown in (b), it is mounted on a hanger portion 64 provided on the flange portion 61.

In the above, the bolt insertion holes in each flange are arc-shaped long holes so that bolts can be easily inserted into the fixed flange 12 at the end of the pipe joint body and the central flange 61 of the short pipe 6. As shown in FIG. 3, the height of the central flange 61 of the short pipe 6 can be made lower than the position of the bolt 5.

[0018]

The piping structure of the present invention has the above-mentioned construction. At the connecting portion between the pipe joint bodies, the two pipe joint bodies are fastened with common bolts, and the bolts of the packing push plate for each pipe joint body are used. Since the tightening is eliminated, even if the space between the two fitting bodies is reduced, there is no hindrance to the bolt tightening work, and the connecting portion between the fitting bodies can be made compact by narrowing the space. . Furthermore, the bolts used for connection between the pipe joint bodies are common to both pipe joint bodies and the number of bolts can be reduced, and the connection between the pipe joint bodies does not require a packing push plate. Therefore, the work is easy, and furthermore, the common packing and bolts can be used for the connection between the pipes and the connection of the pipes of the pipe joint body, so that the whole parts management is also easy.

[Brief description of the drawings]

FIG. 1 (a) is a partial cross-sectional view showing a connecting portion between pipes according to an embodiment of the present invention, and FIG. 1 (b) is a part showing a connecting structure of pipe joints according to the embodiment. It is sectional drawing.

FIG. 2 is a partial cross-sectional view showing an example of a different suspension structure of a short pipe used in the present invention.

FIG. 3 is a partial cross-sectional view showing another example of the connecting portion of the pipe joints used in the present invention.

4 (a) is a partial cross-sectional view showing a connection structure between a pipe and a joint in a conventional example, and FIG. 4 (b) is a partial cross-sectional view showing a connection structure between pipe joints in the same manner. .

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pipe joint main body 11 Tube end insertion groove 2 Pipe 21 Pipe end 3 Packing 4 Packing push plate 5 Bolt 6 Short pipe 61 Flange

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F16L 21/00 F16L 23/036

Claims (1)

(57) [Claims] 1. A pipe joint body having a pipe end insertion groove in an inner surface of the end, and a pipe end inserted into the groove together with packing.
In the middle of a pipe structure in which pipes are connected to each other by a pipe joint having a push plate fixed to the end of the pipe joint body by bolts and pressing a rear end of the packing, a pipe is inserted into a pipe end insertion groove at one end. The ends of the left and right halves of the short pipe having a flange in the center are respectively inserted into the pipe end insertion groove on the other end side of the pipe joint body connected by the packing, the push plate, and the bolt. A piping structure, wherein the pipe joint body is inserted, the other ends of the pipe joint bodies are fastened with bolts, and the rear end of each packing is pressed on each side surface of the flange.