JPH05106768A - Piping structure - Google Patents

Abstract

PURPOSE:To provide piping capable of being assembled easily in a compact size by fastening two joint main bodies with a common bolt, and dispensing with fastening of the bolt for packing pushing plate with respect to each joint main body. CONSTITUTION:An end 21 of a steel pipe 2 coated with resin in its inner surface is inserted together with a packing 3 into a pipe end insertion groove 11 of a pipe joint main body 1, and a packing pressing plate 4 is fastened to a fixed flange 12 at an end of the pipe joint main body 1 by means of a bolt, then a protruding end 31 from the pipe main body 1 of the packing 3 is pressed by the packing pressing plate 4. Both pipe joint main body is fastened by such a common bolt in this way, thereby dispensing with the bolt fastening work of the packing pressing plate, for each joint main body. It is thus possible to make the connection part between the pipe joint main bodies by reducing the distance between the pipe main bodies since there occurs no problem in the bolt fastening work even if the distance is reduced. Furthermore, the common bolt to be used for the connection of the pipe joint main bodies serves to reduce the number of bolts.

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, it is used for indoor drainage piping.

[0002]

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

As a pipe capable of satisfying this anticorrosion property, an inner surface resin-coated steel pipe in which a vinyl chloride resin pipe is adhered to the inner surface of the steel pipe with an adhesive is known. Further, as a pipe joint capable of retaining the inner surface corrosion resistance of the resin-coated steel pipe and having excellent seismic resistance, as shown in (a) of FIG. 4, the pipe end portion is inserted into the inner surface of the end portion. The end portion 21 'of the inner surface resin-coated steel pipe 2'is inserted together with the packing 3'into the pipe end portion insertion groove 11' of the pipe joint body 1'having the groove 11 'and is inserted into the pipe 2'in advance. The above-mentioned packing push plate 3'is fastened to the fixed flange portion 12 'at the end of the pipe joint body with 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, the hook portion 3 which surrounds the inner surface resin-coated steel pipe end surface 20 'at the tip of the packing 3'.
0'is formed, and this hook portion 30 'forms the same end face 20'.
It prevents direct contact with drainage and has a structure that prevents rusting. Moreover, since the packing is tightened, the construction is easy.

In indoor piping, particularly indoor drainage piping, it is possible to assemble a cross-shaped branch portion by connecting a T-type pipe joint or a Y-type pipe joint, or to assemble a bend portion having a large bend angle for connecting a bend pipe joint. Yes, when using the pipe fitting shown in the above figure, as shown in (b) of FIG.
Left and right ends 2 of the cutting short pipe 20 ″ of the inner surface resin-coated steel pipe
Packing 3'and packing pushing plate 4'between 1 ", 21" and the groove 11 'for inserting one end side pipe end of each pipe joint body 1'.
And bolt 5 '.

[0006]

Due to the installation space of the cross-shaped branch portion and the bent portion, the length of the short pipe 2 "is the minimum length (width required to hang the left and right insertion allowances and the hanging band in the center). Therefore, it is difficult to provide a sufficient space between the packing push plates 4 ', 4', and the bolts 5 ', 4'
Tightening work of ... becomes difficult and there is a problem in workability.

An object of the present invention is to construct a cross-shaped branch portion by connecting T-type pipe joints or Y-type pipe joints or to construct a bend portion having a large bend angle for connecting bend pipe joints. It is an object of the present invention to provide a piping structure capable of easily and easily assembling a die branch portion and a bent portion with excellent mechanical strength in a sufficiently compact manner.

[0008]

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

[0009]

[Function] The packing between each pipe joint body and each half of the short pipe is tightened by the tightening force of the bolts that fasten the pipe joint body to each other, and a packing push plate is required for tightening each of these packings. Therefore, it is possible to narrow the interval between the two pipe joint body pipes, and it is possible to easily tighten the bolts even if the interval is narrowed. In addition, the number of parts can be reduced, and the labor required for construction can be reduced.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. The structure of the connecting portion between the pipes in the piping structure of the present invention is substantially the same as the above-mentioned conventional structure, and as shown in FIG. 1B, the pipe end insertion groove 11,
The end 21 of the inner surface 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 11 and the packing push plate 4 previously inserted into the pipe 2 is the pipe joint body end 1 The fixing flange portion 12 is fastened with bolts 5, and the projecting end 31 of the packing 3 from the pipe joint body 1 is pressed by the packing pressing plate 4.

In the piping structure of the present invention, a T-shaped branch pipe joint, a Y-shaped branch pipe joint are connected to form a cross-shaped branch portion, and a bend pipe joint is connected to a bend portion having a large bend angle. FIG. 1B shows the structure of the joint portion of the pipe joints.

In FIG. 1B, reference numeral 1 denotes a pipe joint main body, which has pipe end insertion grooves 11 and 11 on both inner surfaces and a fixing flange 1 on both outer surfaces, as in the pipe joint main body described above.
2 and 12 are provided in a protruding manner, and the flange 12 is provided with a bolt insertion hole. 6 is a plastic short tube,
It has a flange portion 61 in the center, and the flange portion 61 has
A bolt insertion hole is provided similarly to the fixed flange 12 at the end of the pipe joint body. 3 is a packing, which is the same as the packing.

Reference numerals 62 and 62 denote right and left halves of the short pipe 6,
Each of these half portions 62 is inserted into the pipe end insertion groove 11 on one end side of each pipe joint main body 1 together with the packing 3, the rear end 31 of each packing 3 is projected from each pipe joint main body 1, and each of these packings The rear end 31 of 3 is the central 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 the bolt insertion hole of the central flange 61 of the short pipe 6 to fasten the fixing flanges 12 and 12 at both pipe joint body ends, and each side surface of the central flange 61 of the short pipe 6. Then, the rear end 31 of each packing 3 is pressed to tighten each packing 3.

In FIG. 1B, 2 is a pipe,
An inner surface resin-coated steel pipe is used, and is connected to the other end of each pipe joint body 1 by a packing, a packing pressing plate, and a bolt, as in (b) of FIG.

In FIG. 1B, 7 is a hanging bolt, and as shown in FIG. 2A, a screw hole metal fitting 63 embedded in the central flange portion 61 of the short pipe 6 or FIG. As shown in (b) of (4), it is supported by a hanger portion 64 provided on the flange portion 61.

In the above, the bolt insertion holes in each flange are arcuate long holes so that the bolts can be easily inserted into the fixing flange 12 at the end of the pipe joint body and the central flange 61 of the short pipe 6, or As shown in FIG. 3, it is possible to make the height of the central flange 61 of the short pipe 6 lower than the position of the bolt 5.

[0018]

The piping structure of the present invention is constructed as described above, and at the connecting portions of the pipe joint bodies, both pipe joint bodies are fastened with a common bolt, and the bolts of the packing push plate for each pipe joint body are fastened. Since tightening is eliminated, tightening the bolts does not hinder the tightening of the pipe joint bodies even if the gap between the pipe joint bodies is narrowed, and the gap between the pipe joint bodies can be made compact. .. In addition, the bolts used to connect the pipe joint bodies are common to both pipe joint bodies, the number of bolts can be reduced, and no packing push plate is required for connecting the pipe joint bodies. Since the work can be reduced, the common packing and bolts can be used for the mutual connection of the pipes and the connection of the main pipe of the pipe joint body, and the management of the whole parts is also easy.

[Brief description of drawings]

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

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

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

FIG. 4A is a partial cross-sectional view showing a connection structure between a pipe and a joint in a conventional example, and FIG. 4B is a partial cross-sectional view showing a connection structure between pipe joints. .

[Explanation of symbols]

 1 Pipe Joint Main Body 11 Pipe End Insertion Groove 2 Pipe 21 Pipe End 3 Packing 4 Packing Press Plate 5 Bolt 6 Short Pipe 61 Flange

Claims (1)

[Claims] 1. A pipe joint body having a groove for inserting a pipe end on the inner surface of the end, and the pipe end being inserted together with packing in the groove.
In the middle of a pipe structure in which pipes are connected to each other by a pipe joint having a push plate which is fastened to the end of the main body of the pipe joint by a bolt and presses the rear end of the packing, the pipe is inserted in a groove for inserting a pipe end portion on one end side. Of the short pipe having a flange in the center of each of the left and right halves together with the packing in the pipe end insertion groove on the other end side of each of the pipe joint main bodies whose ends are connected by the packing, the push plate and the bolt. A piping structure characterized in that it is inserted, the other ends of these pipe joint bodies are fastened with bolts, and the rear end of each packing is pressed by each side surface of the flange.