JP2006266397A - Pipe component - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pipe component being suitable for piping construction work by use of an electrofusion joint. <P>SOLUTION: The pipe component provided with four bends and two substantially Z character parts integrally and capable of utilizing the electrofusion joint and the pipe component provided with three bends, one substantially Z character part, and one elbow integrally are systematically manufactured. Construction time can be greatly shortened by using these pipe components. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a piping component that can be used for piping construction using an electrofusion joint.

Water and gas polyethylene pipes are constructed using electrofusion joints. This polyethylene pipe is widely used because of the excellent flexibility and corrosion resistance of the pipe itself, and since it has excellent workability by using an electrofusion joint, it is widely used. Many proposals have been made on electrofusion joints and construction methods. Patent Document 1 proposes a polyolefin pipe for piping suitable for an electrofusion joint, Patent Document 2 proposes a connecting part for resin piping, and Patent Document 3 proposes an electrofusion joint and pipe material.
JP 2002-106754 A JP 2000-220785 A Japanese Patent Laid-Open No. 9-42571

Various parts are used to facilitate construction using an electrofusion joint. FIG. 5 is a view showing a conventional typical electrofusion joint and parts.
In the electrofusion joint system, each joint shown in FIG. 5 is connected to electricity on a caramel-like object (connector terminal) attached to the surface two by two, and heats a hot wire incorporated in the joint, Fusing the joint and straight pipe. The material of the material is a resin that can be electrofused, for example, polyethylene. Qi 1 is used for branching a pipe and has connector terminals at both ends. The turn piece 2 has two bends, and in the illustrated example, a connector terminal is provided at one end. Generally speaking, the elbows 3 and 4 are piping parts used for changing the direction of the piping path of the pipe. Elbows 3 and 4 are shown as 45 ° and 90 °.

  The socket 5 is used to connect straight pipes. The cap 6 is attached to the end of the pipe and used to seal the pipe. The bypass saddle 7 takes out bypass piping necessary for construction. Qi 8 and 9 connect thin pipes that are supplied from a thick pipe to each household.

There are various problems to be solved in the construction of embedding polyethylene piping used for gas and water using the above-described electrofusion joint and parts.
In order to avoid obstacles in existing buried objects, a large number of cut pipes that match the on-site dimensions are made of long straight pipes, and pipes that fit the respective locations are joined together using electrofusion joints to avoid piping. The problems of the conventional example being created will be described.

FIG. 6 is a perspective view for explaining a conventional construction example of the avoidance piping, and shows a construction that bypasses the manhole 13. Electrofusion is performed at least at six locations using two 90 ° elbows 4, four straight pipes 10, and one turn piece.
As can be seen from the figure, many types of joints are used. In addition, along with this, there are many connection points and fusion points.
As a result, of course, a great deal of work time is spent on the connection. And the present condition is that the material cost is also large. In addition, there are increasing risks of traffic restrictions that greatly affect work time and the risk of pedestrians and bicycles passing by the drilled holes. During night construction, pedestrians and cyclists are exposed to the risk of having to pass by dug holes.

  The object of the present invention is to provide piping parts suitable for detour work of the manhole 13, etc., thereby reducing the material cost, reducing the number of times of fusion of the joints, and shortening the construction work time. The purpose is to alleviate traffic congestion by reducing the time required for one-side regulation and road closure.

In order to achieve the object, a piping component according to claim 1 according to the present invention is provided.
A piping component for performing piping construction using an electrofusion joint,
The pipe-shaped part formed by bending the straight pipe sequentially to one end of the intermediate straight pipe and the elbow part formed by the straight pipe bend-connected to the other end of the intermediate straight pipe part are integrally provided by a pipe capable of electrofusion. And
The center of each bend angle of the three bend portions is selected from one or a combination of one or more of 11.5 °, 15 °, 22.5 °, 30 °, 45 °, 60 ° and 90 °. It is configured.
In the present invention, the letter B portion includes three straight pipes (including the intermediate straight pipe) and two bends, and the bend angle includes 90 ° as described above.
In order to achieve the object, a pipe component according to claim 2 according to the present invention is provided.
A piping component for performing piping construction using an electrofusion joint,
A part that can be electrofused with a B-shaped part formed by bending a straight pipe to one end of the intermediate straight pipe and another B-shaped part formed by bending a straight pipe to the other end of the intermediate straight pipe. Provided integrally,
The center of each bend angle of the four bend portions is selected from one or a combination of one or more of 11.5 °, 15 °, 22.5 °, 30 °, 45 °, 60 ° and 90 °. It is configured.
According to a third aspect of the present invention, there is provided a piping component according to the first or second aspect, wherein each bend portion is made thicker than the thickness of the straight tube for reinforcement and is connected to the straight tube by a tapered portion. Has been.

An embodiment of the piping part according to the present invention is the piping part according to claim 1 or 2, wherein the length of the straight pipe part of each part is the length of the intermediate straight pipe when the cross section of the obstacle to be avoided is a circle. The length is about the diameter of the circle, and the other straight pipe portions are about the radius of the circle.
Still another piping component embodiment according to the present invention is such that, in the piping component embodiment, the obstacle is a manhole, and other obstacles such as intersecting pipes are also planned.
Still another piping component embodiment according to the present invention is the piping component according to claim 1 or 2, wherein the center of the pipe of the piping component is in the same plane. In addition to the standard configuration, various configurations in which the center of the piping component is on a parallel plane and an intersecting plane other than in the same plane can be formed. Thereby, the piping components which can cope with formation of a wide variety of avoidance piping can be supplied.

The construction method using the piping component according to claim 1 is a construction method using an electrofusion-possible piping member having three bend portions, and one end of the end portion of the piping member is electrically connected to another straight pipe. It is connected by a fusion socket, and the other end of the piping member is configured to be connected to another elbow capable of electrofusion by an electrofusion socket.
The construction method using the piping component according to claim 2 is a construction method using an electrofusion-possible piping member having four bend portions, and both ends of the piping member are connected to another straight pipe and an electrofusion socket, respectively. To connect.

According to the piping component of the first or second aspect, it is possible to prepare a reasonable piping component by planning various obstacles.
According to the piping component of claim 3, since the reinforcing part is smoothly connected to the straight pipe, the corner of the reinforcing part hits a component member of the groove drilled during construction, or hits an obstacle. There is no need to do so, and the work becomes easy.
In short, if the piping component according to the present invention is used, it is possible to reduce the time required for the construction by reducing the number of fused portions for connection in the portion of the obstacle avoidance piping that uses many current various joints. Therefore, it is possible to shorten the regulation time for traffic obstruction and one-sided traffic. Therefore, the safety of pedestrians can be protected. In addition, the number of expensive joints used can be reduced, and the construction material costs can be reduced.

Embodiments of an apparatus according to the present invention will be described below with reference to the drawings. FIG. 1 is a schematic diagram for explaining the principle of a piping component according to the present invention and a construction method using the piping component.
FIG. 3A shows a piping component in which an intermediate straight pipe MS and three straight pipes S are integrally provided by three bends b. α, β, and γ represent the bend angle bend angle. A straight pipe S connected to the intermediate straight pipe MS with a bend angle β and another straight pipe S connected to the straight pipe S with a bend angle β form a letter-shaped portion.
FIG. 5B shows a piping component in which an intermediate straight pipe MS and four straight pipes S are integrally provided with four bends b. It is considered that the two straight parts are provided in common with the intermediate straight pipe MS.

The bend angle used in the piping component according to the present invention is selected from one or a combination of two or more of 11.5 °, 15 °, 22.5 °, 30 °, 45 °, 60 ° and 90 °. Yes,
In the example shown in FIG. 1A, the bend angles α, β, and γ are 60 °.
In the example shown in FIG. 1B, the bend angles α, β, γ, and δ are 60 °.
In the example of the piping parts used in the construction shown in FIG. 1C, the bend angle is 90 °.
As shown in FIG. 1C, if the diameter of an obstacle having a manhole is D, the length of the intermediate straight pipe MS is the length before and after D for any bend angle, and other straight pipes. By setting the member to be around D / 2, piping parts are prepared corresponding to various predicted failures.

FIG. 2 is a perspective view of a 4-bend piping component 100 belonging to the format shown in FIG. The piping component 100 including the four vents has two letter-shaped portions.
The intermediate straight pipe 101, the bends 102, 104, 106, 108 and the straight pipe members 103, 105, 107, 109 are included. Reference numerals 101, 102, 103, 104, and 105 constitute one last character part, and 101, 106, 107, 108, and 109 constitute the other last character part.

  FIG. 3 is a perspective view showing a construction example of a 3-bend piping component according to the present invention. A pipe component 200 having three vents according to the present invention shown in FIG. 3 includes an intermediate straight pipe 201, straight pipes 203, 205, and 207 bends 202, 204, and 206. A portion including the intermediate straight pipe 201, the straight pipes 203 and 205, and the bends 202 and 204 forms a round-shaped portion having a bend angle of 60 °, and a portion including the intermediate straight pipe 201, the straight pipe 207 and the bend 206 is an elbow having a 30 °. Forming.

The construction example in FIG. 3 is a construction in which the piping component 200 and a 30 ° elbow composed of the straight pipes 209, 207 ′ and the bend 208 are joined by the socket 5.
This construction example is the same as the case of adjusting the length (adjusting the offset amount) by cutting the straight pipe portion 107 of the piping component shown in FIG.
According to this construction method, it is clear that the construction time is shortened compared to that described with reference to FIG.

The piping parts according to the present invention are mass-produced at a factory. Piping parts with thickened and reinforced bend shapes compared to other straight pipe parts can be used. This will be described in detail with reference to FIG. FIG. 2A shows a letter-shaped portion having two reinforced bends, and FIG. 2B is an enlarged view of one of the reinforcing portions.
The inner diameter of the tube is maintained at the initial inner diameter, and a build-up reinforcing portion Re is provided outside the bent portion, and is configured to be gently connected to the straight pipe portion at a portion Ju shown in A. If a step is formed at the connecting portion between the reinforcing portion and the straight pipe portion, the step may be impaired, and therefore the connection is made with a taper. The alternate long and two short dashes line in FIG. 4B virtually shows the thickness of a normal tube. The said process is continuously manufactured using the machine and resin coating apparatus which bend | fold a pipe material. Moreover, the said part can also be manufactured with a type | mold.
In FIG. 4B, an example of bend reinforcement is shown, but it is naturally conceivable that reinforcement is not necessary. In this case, in the cross section of (B), it is possible to use the one in which the bend portion is formed in a state where the thickness of the straight pipe is maintained. This is what keeps the outer shape shown by the two-dot chain line in the figure.

Since the piping parts according to the present invention can be produced in large quantities at a resin pipe manufacturing factory or a deformation processing factory, they can be used in the field of resin material processing.
The piping parts produced in this way are used at the construction site, and the construction time can be greatly reduced, so that they can be used in the field of civil engineering work.

It is the schematic for demonstrating the principle of this invention. It is a perspective view which shows the Example of the piping components of 4 bends by this invention. It is a perspective view which shows the construction example of 3 bend piping parts by this invention. It is explanatory drawing which shows the state of reinforcement of the bend part of the piping components by this invention. It is a perspective view which shows the piping components and coupling of the conventional typical electrofusion joint system. It is a perspective view for demonstrating the example of a conventional construction of avoidance piping.

Explanation of symbols

α, β, γ, δ Bend angle b Bend S Straight pipe MS Intermediate straight pipe Ob Obstacle 100 Piping component having four vents 101 Intermediate straight pipe 102, 104, 106, 108 Bend 103, 105, 107, 109 Straight pipe 200 Piping component with three vents 201 Intermediate straight pipe
203, 205, 207, 207 ', 209 Straight pipe 202, 204, 206, 208 Bend
1 Chi 2 Turnpiece 3 45 degree elbow 4 90 degree elbow 5 Socket 6 Cap 7 Bypass saddle 8 Pre-emption service chi 9 Service chi 10 Straight pipe cut pipe (or straight pipe)
13 (Ob) Manhole as an obstacle

Claims (3)

A piping component for performing piping construction using an electrofusion joint,
The pipe-shaped part formed by bending the straight pipe sequentially to one end of the intermediate straight pipe and the elbow part formed by the straight pipe bend-connected to the other end of the intermediate straight pipe part are integrally provided by a pipe capable of electrofusion. And
The center of each bend angle of the three bend portions is selected from one or a combination of one or more of 11.5 °, 15 °, 22.5 °, 30 °, 45 °, 60 ° and 90 °. Piping parts. A piping component for performing piping construction using an electrofusion joint,
A part that can be electrofused with a B-shaped part formed by bending a straight pipe to one end of the intermediate straight pipe and another B-shaped part formed by sequentially bending a straight pipe to the other end of the intermediate straight pipe. Provided integrally,
The center of each bend angle of the four bend portions is selected from one or a combination of one or more of 11.5 °, 15 °, 22.5 °, 30 °, 45 °, 60 °, and 90 °. Piping parts.   3. The piping component according to claim 1, wherein each bend portion is thicker than the thickness of the straight tube for reinforcement and is connected to the straight tube by a taper portion.

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