JP2022071184A - Building piping system and construction method of the system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To greatly reduce construction work at a construction site by a building piping system composed by connecting piping elements to each other using mechanical pipe joints.

SOLUTION: An annular swelling part is formed integrally at at least one pipe end of a piping element. At a connection part between a mechanical pipe joint and the piping element, a part of the mechanical pipe joint is further constituted with the pipe end where the annular swelling part of the piping element constituting the connection part is formed. In addition, an RF tag to and from which electronic data including data corresponding to identification information on individual piping elements and construction position information is provided to at least a part of the piping element. The piping element is manufactured at a manufacturing site, and transported to a construction site of a building piping system, and a plurality of piping elements are connected to each other with mechanical pipe joints at the construction site to form the building piping system. At this time, end parts of adjacent piping elements which are in a straight-tube shape are fitted around diameter-increase parts of a press type pipe joint to be fixed by caulking.

SELECTED DRAWING: Figure 2

COPYRIGHT: (C)2022,JPO&INPIT

Description

The present invention relates to a building piping system and a construction method of the system. More specifically, the present invention relates to a building piping system formed by connecting piping elements to each other using a mechanical pipe fitting and a construction method of the system.

A building piping system that supplies and / or circulates cold water and / or hot water as a heat medium for domestic water and heating / cooling connects thin-walled piping elements made of metal such as iron such as stainless steel at the construction site. It may be organized by things. In the connection work of piping elements at such a construction site, for example, from the viewpoint of ensuring work ease and safety, mechanical type pipe joints that do not require the use of firearms or the like are used. Mechanical type pipe fittings are classified into various types such as press type, pipe expansion type, nut type, rolled screw type, insertion type and coupling type according to the standard (SAS322) defined by the Stainless Steel Association. In many of these types, at the construction site, an annular bulge or an annular groove is formed at the end of the piping element by an operator, and the piping element engages with the piping element when the pipe joint is assembled. It is stopped and the piping elements are airtightly or liquidtightly connected.

According to the mechanical type pipe joint as described above, difficult and dangerous work such as welding work and thread cutting work becomes unnecessary, so that the work at the construction site is facilitated. However, since it is still necessary to form an annular bulge or an annular groove in each piping element and to connect the piping elements while assembling the pipe joint, further simplification and cost reduction are required. Has been done.

Therefore, in the technical field, a large number of metal mechanical pipe joints in which an annular bulging portion is integrally formed and have various shapes are prepared, and a straight pipe as a piping element is used as an enlarged diameter portion of the pipe joint. A construction method is used in which piping elements are connected to each other to form a piping system by inserting it into a (socket portion) and deforming (caulking) the annular bulging portion. As a specific example of such a mechanical type pipe joint, for example, "press type pipe joint" disclosed in Patent Document 1 (Patent No. 3436822) can be mentioned. In this press-type pipe joint, an annular seal member (O-ring) made of an elastic material is attached to the inside (annular groove) of the annular bulge formed in the enlarged diameter portion, and the end of the piping element (connecting pipe). The portion (pipe end) is inserted inside the enlarged diameter portion. Then, while this state is maintained, both side portions sandwiching the annular bulging portion and the annular bulging portion are diameter-reduced (caulked) in the axial direction of the enlarged diameter portion, and the connecting pipe is airtightly or liquidtightly connected. Will be done.

However, by a plurality of piping elements of a straight pipe, an elbow pipe including a bent portion, a cheese pipe including a branch portion, a reducer pipe including a gradual change portion, and a pipe containing a low rigidity portion (for example, a bellows including a bellows portion). When constructing a desired piping system, it is necessary to individually arrange and caulking a press type pipe joint to each of the connection portions between these piping elements. Therefore, the number of times of caulking is enormous, and as a result, there is a risk of leading to problems such as a decrease in efficiency of construction work and an increase in cost. In addition, the number of pipe joints used for connecting piping elements is enormous, which may lead to an increase in material cost.

As a solution to the above problems, a predetermined number of piping elements are pre-organized as a unit at a manufacturing site such as a factory, the unit is transferred to a construction site, and the unit and other units and / or other units are used. A so-called "prefabricated method" has also been proposed in which piping elements are connected to each other by mechanical pipe joints. For example, Patent Document 2 (Patent No. 6177520) proposes a method of constructing a circuit for circulating a refrigerant between indoor and outdoor units of an air conditioner by such a prefabricated method. In the construction method, a unit in which multiple parts are connected by brazing is formed at the manufacturing site, the unit is transferred to the construction site after an airtightness test, and the units are connected to each other by using an independent fitting type connection joint. Will be done.

Japanese Patent No. 3436822 Japanese Patent No. 6177520

However, in the above-mentioned conventional technique, by pre-organizing a predetermined number of piping elements as a unit at a manufacturing site such as a factory, the amount of work at the construction site is reduced by that amount, but the unit is provided by an independent fitting type connection joint. You need to connect each other. That is, the prefabricated construction method as described above merely transfers a part of the number of fitting type connection joints (and the man-hours for connection work) used at the site to the manufacturing site. Even if the inset type connection joint is replaced with a press type pipe joint, the number of press type pipe joints used in the field and a part of the number of times of caulking are only transferred to the manufacturing site in the same manner as above. It results in a problem. As described above, it is difficult to reduce the overall workload and the number of parts including the manufacturing site and the construction site only by prefabricating a part of the plurality of piping elements constituting the piping system.

Therefore, for the purpose of reducing the number of times of caulking of the press-type pipe joint, a structure (for example, an enlarged diameter portion, an annular bulging portion, etc.) constituting a part of the press-type pipe joint is provided at the pipe end of the piping element. It is conceivable to form them integrally. However, there is no equipment or place for processing work to form such a structure at the pipe end of the piping element at a general construction site, and there are few workers who have the skills to perform the processing work. , It is extremely difficult to perform the processing work at the construction site.

Therefore, one object of the present invention is a building piping system capable of significantly reducing construction work at a construction site in a building piping system formed by connecting piping elements to each other using a mechanical type pipe joint. Is to provide.

As a result of diligent research, the present inventor integrally forms an annular bulge at at least one pipe end of a pipe element in a building piping system composed of a plurality of pipe elements connected to each other by a mechanical pipe joint. It has been found that the above problem can be solved by forming a part of the pipe joint or a part of the connection structure between the pipe joint and the pipe element by the pipe end.

In view of the above, the building piping system according to the present invention (hereinafter, may be referred to as "the system of the present invention") is for building, which is composed of a plurality of piping elements connected to each other by a mechanical type pipe joint. It is a piping system. Further, a diameter-expanded portion is integrally formed over a certain range at at least one pipe end of the piping element, and the diameter-expanded portion bulges outward in the radial direction over the entire circumference. An annular bulge, which is a portion, is integrally formed. In addition, at least one of the mechanical type pipe joints is composed of the enlarged diameter portion, the annular bulging portion, and an annular sealing member (O-ring) inside the annular bulging portion. It is a pressed type pipe fitting.

Further, the construction method of the building piping system according to the present invention (hereinafter, may be referred to as "the method of the present invention") is a building composed of a plurality of piping elements connected to each other by mechanical pipe joints. It is a construction method of a construction piping system, and is a construction method of a construction piping system, which includes the manufacturing process, the transfer process, and the construction process listed below.

Manufacturing process: At the manufacturing site, a diameter-expanded portion is integrally formed over a certain range at at least one pipe end of at least one pipe element constituting a building piping system, and the diameter is directed outward in the radial direction over the entire circumference. A step including forming an annular bulging portion, which is a bulging portion, integrally with the enlarged diameter portion.
Transfer process: The process of transferring piping elements and mechanical fittings from the manufacturing site to the construction site of a building piping system.
Construction process: A process of forming a building piping system by connecting multiple piping elements transferred in the transfer process to each other at a construction site using mechanical pipe fittings.

In addition, in the method of the present invention, the pipe end on which the annular bulge of the pipe element is formed constitutes a part of the mechanical pipe joint.

The system of the present invention is a building piping system composed of a plurality of piping elements connected to each other by mechanical pipe fittings. Further, a diameter-expanded portion is integrally formed at at least one pipe end of the piping element, and an annular bulging portion is integrally formed at the enlarged-diameter portion. In addition, at least one of the upper mechanical pipe joints is a press type composed of the enlarged diameter portion, the annular bulging portion, and the annular sealing member incorporated inside the annular bulging portion. It is a pipe joint. By integrally forming the enlarged diameter portion and the annular bulging portion at the pipe end of the piping element at the manufacturing site such as a factory, the processing accuracy of the enlarged diameter portion and the annular bulging portion is improved, and the man-hours of the work at the construction site are improved. And the difficulty can be reduced. Further, since the press-type pipe joint is formed by at least one pipe end in which the enlarged diameter portion and the annular bulge portion of the pipe element are formed, compared with the case where a press-type pipe joint separate from the pipe element is used. Therefore, the number of times of caulking can be halved.

That is, according to the present invention, in a building piping system formed by connecting piping elements to each other using a mechanical type pipe joint, it is possible to significantly reduce construction work at a construction site.

Other objects, other features and accompanying advantages of the invention will be readily understood from the description of each embodiment of the invention described with reference to the following drawings.

It is a schematic diagram which shows an example of the structure of the building piping system (the first system) which concerns on 1st Embodiment of this invention. It is a schematic diagram which shows an example of the structure of one piping element among the plurality of piping elements constituting the 1st system. It is a schematic diagram which shows a mode that two piping elements of a plurality of piping elements constituting a 1st system are connected by a press type pipe joint integrally formed with the pipe end of one piping element. It is a schematic diagram which shows the positional relationship of a pair of piping elements, a sealing member and a casing connected by the expansion type pipe joint included in the building piping system (third system) which concerns on 3rd Embodiment of this invention. The first mark is used when two piping elements out of a plurality of piping elements constituting the building piping system (fourth system) according to the fourth embodiment of the present invention are connected by a press type pipe joint. It is a schematic diagram which shows how the mutual insertion allowance and mutual indexing are set to a predetermined appropriate amount. It is a flowchart which shows an example of the flow of each process in the construction method (sixth method) of the building piping system which concerns on the sixth embodiment of this invention. It is a flowchart which shows an example of the flow of each process in the construction method (the tenth method) of the building piping system which concerns on the tenth embodiment of this invention. It is a flowchart which shows an example of the flow of each process in the construction method (the eleventh method) of the building piping system which concerns on 11th Embodiment of this invention. It is a schematic diagram which shows the mode that the building piping system is organized with the execution of the 1st process to the 3rd process included in the construction process of the eleventh method. It is a flowchart which shows an example of the flow of each process in the construction method (the twelfth method) of the building piping system which concerns on the twelfth embodiment of this invention.

<< First Embodiment >>
Hereinafter, a building piping system (hereinafter, may be referred to as a “first system”) according to the first embodiment of the present invention will be described.

<Constitution>
The first system is a building piping system composed of a plurality of piping elements connected to each other by mechanical pipe fittings. In a piping system constructed in an actual building or the like, for example, almost all the surfaces are covered with a heat insulating material, or the surface is suspended from the ceiling by a support metal fitting at an appropriate place. The same applies to the first system, but since such ancillary construction forms are well known to those skilled in the art, the description of such ancillary construction forms will be omitted in the present specification.

Further, a diameter-expanded portion is integrally formed over a certain range at at least one pipe end of the piping element, and the diameter-expanded portion bulges outward in the radial direction over the entire circumference. An annular bulge, which is a portion, is integrally formed. In the present specification, the piping element is a tubular member in which a space through which a fluid can flow is defined inside, and a flow path having a desired structure can be configured by connecting a plurality of piping elements. .. Further, the enlarged diameter portion refers to a portion whose diameter is expanded so that the inner diameter of the piping element is larger than that of other portions. Further, the annular bulging portion refers to a portion in which a part of the pipe wall of the piping element bulges outward in the radial direction over the entire circumference. The specific method for forming such an enlarged diameter portion and an annular bulging portion is not particularly limited. The enlarged diameter portion can be formed by, for example, plastic working such as so-called "spinning". The annular bulge can be formed, for example, by threading. Further, the annular bulge can be formed by the so-called "urethane bulge method" in which the bulge is formed in a part of the tubing by compressing the tubing filled with the urethane material in the axial direction. Alternatively, the annular bulging portion may be formed by, for example, so-called "hydraulic bulge (hydroforming) processing" or a split type expansion type tube expansion method.

The enlarged diameter portion and the annular bulging portion are formed at at least one pipe end of each pipe element. That is, in each pipe element, an annular bulge is formed at one pipe end, two or more pipe ends, or all pipe ends.

In addition, at least one of the mechanical type pipe joints is composed of the enlarged diameter portion, the annular bulging portion, and an annular sealing member (O-ring) inside the annular bulging portion. It is a press type pipe joint.

When connecting piping elements using a press type pipe joint, an annular sealing member (O-ring) made of an elastic material is placed inside the annular bulging portion formed in the enlarged diameter portion formed at the pipe end of the piping element. With the pipe ends of other piping elements inserted into the enlarged diameter portion, caulking is performed on both sides of the annular bulge and the annular bulge in the axial direction of the enlarged diameter portion. These two piping elements can be airtightly or liquidtightly connected. That is, an enlarged diameter portion and an annular bulging portion are formed on one of the two opposite pipe ends of the two connected piping elements, and the enlarged diameter portion and the annular bulging portion are not formed on the other. The enlarged diameter portion in which the annular bulging portion of the former piping element is formed functions as a press type pipe joint. In other words, at the connecting portion of these two piping elements, a pipe end having an enlarged diameter portion and an annular bulging portion of one piping element, and a part of a press type pipe joint as a mechanical type pipe joint are formed. ing.

Similar to the building piping system according to the prior art (hereinafter, may be referred to as "conventional system"), the first system also has a structure that matches the structure of the building or the like in which the piping system is provided. It is configured to be. Therefore, at least a part of the plurality of piping elements constituting the first system may be connected so as to form a flow path extending two-dimensionally or three-dimensionally. In other words, at least a portion of the plurality of piping elements constituting the first system can exist over a region corresponding to a specific range of x and y in the two-dimensional xy orthogonal coordinate plane. In this case, the first system may be configured so that a plurality of piping elements exist in the x-axis direction and a plurality of piping elements also exist in the y direction in the above region. Alternatively, at least a portion of the plurality of piping elements constituting the first system can exist over a region corresponding to a specific range of x, y and z in the ternary xyz Cartesian coordinate space. In this case, in the above region, the first system has a plurality of piping elements so that there are a plurality of piping elements in the x-axis direction, a plurality of piping elements in the y-axis direction, and a plurality of piping elements in the z-axis direction. It may be configured.

Further, at least one of the plurality of piping elements constituting the first system may further include at least one portion selected from the group consisting of a bent portion, a branch portion, a gradual change portion and a low rigidity portion. As a result, the first system can be easily configured so as to have a structure that matches the structure of a building or the like in which the piping system is provided. For example, as described above, a flow path extending two-dimensionally or three-dimensionally can be easily configured by at least a part of a plurality of piping elements constituting the first system.

It should be noted that at least one portion selected from the group consisting of the above-mentioned bent portion, branch portion, diametrically changing portion, and low-rigidity portion is integrally formed with each piping element. In addition, "integrally forming" in the present specification means not only forming a portion having a desired shape into a part of the raw tube itself by plastic working (literally integrally forming), but also preliminarily as a separate body. It also means connecting the formed portion having a desired shape to the raw pipe by a method such as welding. That is, the state of being inseparably airtight or liquidtightly connected is called "integrally formed state".

The structure and constituent materials of the piping elements constituting the first system are not particularly limited as long as they can function as a building piping system and can withstand the usage environment and usage conditions in the relevant application. The individual piping elements constituting the first system are not limited to simple straight pipes, and have a wide variety of structures depending on the structure of the fluid flow path to be configured by the first system, as will be described in detail later. be able to.

For example, the constituent material of the piping element constituting the first system is a metal such as iron such as stainless steel. Compared to steel pipes made of carbon steel (SGP pipes), which have been widely used in construction piping systems, stainless steel has higher strength, so it can be made lighter by thinning and has higher corrosion resistance. Therefore, it is possible to extend the life of the piping system (reduce the frequency of renewal). As stainless steel used in building piping systems, austenitic stainless steel is widely used, for example, because of its large distribution volume and easy availability.

However, the piping element constituting the first system may include a portion having a wide variety of shapes as described above. Austenitic stainless steel is relatively difficult to plastically work, and it is necessary to remove the internal stress generated by plastic working and / or welding by solidification heat treatment. Therefore, the manufacturing process of the piping system becomes complicated and difficult, which may lead to an increase in manufacturing cost. Further, in a piping system using austenitic stainless steel, there may be a problem of deformation and / or breakage of the piping system due to a dimensional change of a piping element due to a temperature change of a fluid or the like flowing inside. Furthermore, austenitic stainless steel is significantly more expensive than carbon steel, which may lead to an increase in material costs for piping systems.

Therefore, at least a part of the plurality of piping elements constituting the first system may be made of ferritic stainless steel. Ferritic stainless steels are easier to plasticize than austenitic stainless steels and do not require solidification heat treatment. Further, the coefficient of linear expansion of ferritic stainless steel is significantly smaller than the coefficient of linear expansion of austenitic stainless steel. For example, the coefficient of linear expansion of SUS430 is only about 60% of the coefficient of linear expansion of SUS304. Further, ferritic stainless steel (eg, SUS430, etc.) is cheaper than austenitic stainless steel (eg, SUS304, etc.). Therefore, by constructing at least a part of the plurality of piping elements with ferritic stainless steel, it is possible to suppress an increase in manufacturing cost and material cost of the piping system and also reduce the problems caused by the temperature change as described above. Can be done.

FIG. 1 is a schematic diagram showing an example of the configuration of the first system, and is a bird's-eye view of the first system constituting a flow path extending in a substantially horizontal plane (substantially two-dimensionally) from above in the vertical direction. It is a figure. The first system 1 illustrated in FIG. 1 is composed of 14 piping elements 2 to 15 connected to each other. As described above, in the piping system 1 constructed in an actual building or the like, for example, almost all the surfaces are covered with a heat insulating material, or the piping system 1 is suspended from the ceiling by a support metal fitting at an appropriate place. Illustrations and explanations regarding such incidental construction forms will be omitted.

A pipe on the upstream side is connected to the uppermost flow end a of the piping system 1, and a fluid flows from the a to the inside of the first piping element 2 of the piping system 1. Other pipes and / or equipment are also connected to each of the downstream ends of the pipe elements 3, 8, 9, 11, 12, 13 and 15, c, c, d, e, f, g, chi and li. However, I will omit a detailed explanation of them. That is, in FIG. 1, only the piping system 1 which is the object of the present invention is shown.

The 14 piping elements 2 to 15 constituting the first system 1 are connected so as to form a two-dimensionally extending flow path. In other words, the piping elements 2 to 15 exist over a region corresponding to a specific range of x and y in the two-dimensional xy orthogonal coordinate plane. That is, in the above region, the piping elements 2 to 15 are connected to each other so that a plurality of piping elements exist in the x-axis direction and a plurality of piping elements also exist in the y direction. In the first system 1 illustrated in FIG. 1, there are 14 piping elements 2 to 15 in the above region, but in the piping system at the actual construction site, there are several tens in both the x-direction and the y-direction. Each piping element may be connected.

Further, in the example shown in FIG. 1, a plurality of piping elements are connected so as to form a two-dimensionally extending flow path as described above, but in a building or the like provided with the first system. Depending on the structure, a plurality of piping elements may be connected so as to form a three-dimensionally extending flow path. In other words, the first system may include piping elements constituting a flow path extending in a direction orthogonal to the plane (z direction), rather than all of the plurality of piping elements being contained in one plane. can. From the viewpoint of maximizing the effect achieved by the present invention, the first system shall be used to configure as large a part as possible of the piping system provided in the target building, for example, the entire individual floor of the building. Is ideal. However, depending on the actual condition of the structure of a building or the like where the piping system is provided, for example, only a specific part of the piping system may be configured by the first system.

In the piping elements 2 to 15, at least one portion selected from the group consisting of a straight pipe portion, a bent portion (elbow pipe portion), a branch portion (cheese pipe portion) and a gradual change portion (reducer pipe portion) is integrated. Is formed in. Further, although not shown in FIG. 1, at least one of a plurality of piping elements constituting the first system may include a low-rigidity portion (bellows portion).

Reference numerals a to n shown in FIG. 1 refer to a portion (connecting portion) in which the above-mentioned annular bulging portion is formed. In the first system 1 illustrated in FIG. 1, connecting portions a to n are integrally formed at the upstream end portions of the respective piping elements 2 to 15. In each of the connecting portions b to n, an annular bulging portion is integrally formed in the enlarged diameter portion formed at the pipe end on the upstream side of each of the piping elements 3 to 15, and the enlarged diameter portion and the annular bulge are integrally formed. A press-type pipe joint is composed of an annular sealing member (not shown) incorporated inside the protruding portion and the annular bulging portion. Then, in a state where the downstream end of another piping element adjacent to the upstream side of the piping element is fitted into the enlarged diameter portion of the piping element, the annular bulging portion is formed in the axial direction of the enlarged diameter portion. The portions on both sides to be sandwiched and the annular bulging portion are diameter-reduced (caulked) (not shown). In this way, adjacent piping elements are airtightly or liquidtightly connected and fixed to each other.

Next, the configuration of the piping element will be described in more detail by focusing on one of the plurality of piping elements constituting the first system 1. FIG. 2 is a schematic diagram showing an example of the configuration of one of the 14 piping elements 2 to 15 constituting the first system 1. The piping element 14 has a first pipe 21 that bends and extends from the upstream side on the left side toward the figure to the lower right side toward the figure, and a welded portion 23 located at the center of the first pipe 21. It is composed of a second pipe 22 connected and fixed so as to branch in a T shape. That is, the first pipe 21 and the second pipe 22 are connected by welding, and the pipe element 14 is integrally formed.

A press connection portion l as a mechanical type pipe joint is integrally formed at the upstream end of the first pipe 21. The press connection portion l is a range in which an annular bulging portion containing an O-ring (an annular sealing member made of an elastic material) and enlarged diameter portions on both sides thereof (a piping element 10 adjacent to the upstream side are inserted). It is a press-type pipe joint consisting of "part"). Then, the downstream end of the upstream piping element 10 is fitted and caulked in the enlarged diameter portion. On the contrary, the downstream end of the second pipe 22 is inserted into the press connection portion formed at the upstream end 24 of the piping element 13 adjacent to the downstream side, and is caulked and fixed. There is. As described above, the downstream end of each of the piping elements 2 to 14 is fitted to the press connection portion integrally formed with the upstream end of the other piping elements adjacent to each downstream side. , It is fixed by caulking.

FIG. 3 is a schematic view showing how two of the plurality of piping elements constituting the first system are connected by a press-type pipe joint integrally formed at the pipe end of one of the piping elements. be. In the example shown in FIG. 3, the diameter-expanded portion 16e is integrally formed over a certain range at the pipe end on the upstream side of the pipe element 16 among the two pipe elements 16 and 17. An annular bulging portion 16b is integrally formed in the enlarged diameter portion 16e, and an annular sealing member (not shown) is incorporated inside the annular bulging portion 16b. The press type pipe joint 41 is composed of the enlarged diameter portion 16e, the annular bulging portion 16b, and the sealing member. On the other hand, the above structure is not formed at the downstream pipe end of the pipe element 17 connected to the upstream pipe end of the pipe element 16. That is, the vicinity of the pipe end on the downstream side of the pipe element 17 has a straight tubular shape.

When connecting the piping element 16 and the piping element 17, as shown in the figure by the black arrow, the piping element 17 is inside the enlarged diameter portion 16e formed at the pipe end on the upstream side of the piping element 16. The pipe end on the downstream side of is inserted. Next, while this state is maintained, both side portions (see the shaded portion 41c shown in the figure) sandwiching the annular bulging portion 16b in the axial direction of the annular bulging portion 16b and the enlarged diameter portion 16e are diameter-reduced. (Caulking), the piping element 16 and the piping element 17 are airtightly or liquidtightly connected.

<effect>
In the first system, a diameter-expanded portion and an annular bulging portion are integrally formed at at least one pipe end of the pipe element. In addition, at least one of the mechanical type pipe joints constituting the first system is composed of the enlarged diameter portion, the annular bulging portion, and the annular sealing member incorporated inside the annular bulging portion. It is a press type pipe joint. By integrally forming this annular bulging portion at the pipe end of the piping element at a manufacturing site such as a factory, it is possible to improve the processing accuracy of the annular bulging portion and reduce the man-hours and difficulty of the work at the construction site. can. Further, when the press type pipe joint integrally configured at the pipe end of the pipe element as described above is used, the number of times of caulking is increased as compared with the case where the press type pipe joint separate from the pipe element is used. Can be halved. That is, according to the first system, in a building piping system formed by connecting piping elements to each other using a mechanical type pipe joint, it is possible to significantly reduce the construction work at the construction site.

<< Second Embodiment >>
Hereinafter, a building piping system (hereinafter, may be referred to as a “second system”) according to a second embodiment of the present invention will be described.

As described above, in the first system, at least one of the mechanical type pipe joints has an enlarged diameter portion integrally formed at the pipe end of the piping element and an annular bulge integrally formed at the enlarged diameter portion. It is a press-type pipe joint composed of a portion and an annular seal member incorporated inside the annular bulging portion. By integrally forming the enlarged diameter portion and the annular bulging portion at the pipe end of the piping element at the manufacturing site such as a factory, the processing accuracy of the enlarged diameter portion and the annular bulging portion is improved, and the work at the construction site is performed. Man-hours and difficulty can be reduced.

When connecting piping elements using a press-type pipe joint, an annular seal member made of an elastic material is attached to the inside of the annular bulging portion formed in the enlarged diameter portion formed at the pipe end of the piping element. Then, while the pipe ends of the other piping elements are inserted into the enlarged diameter portion, the portions on both sides sandwiching the annular bulging portion and the annular bulging portion in the axial direction of the enlarged diameter portion are caulked. The two piping elements can be airtightly or liquidtightly connected. That is, an enlarged diameter portion and an annular bulging portion are formed on one of the two opposite pipe ends of the two connected piping elements, and the enlarged diameter portion and the annular bulging portion are not formed on the other. The enlarged diameter portion in which the annular bulging portion of the former piping element is formed functions as a press type pipe joint. In other words, in the connecting portion of these two piping elements, the pipe end in which the enlarged diameter portion and the annular bulging portion of one piping element are formed constitutes a part of the press type pipe joint as a mechanical type pipe joint. are doing.

However, if annular bulges are formed at both of the pipe ends of the two pipe elements to be connected, then the pipe end of one pipe element (the enlarged diameter formed at) of the other pipe element The pipe end cannot be inserted. Therefore, in this case, the pipe end on which the annular bulge is formed cannot function as a press type pipe joint. Incidentally, in this case, for example, if an expansion type pipe joint, which is a kind of housing type pipe joint, is adopted as the mechanical type pipe joint, the side where the annular bulging portion of the two piping elements to be connected is formed. An annular sealing member made of an elastic material is attached so that the pipe ends face each other and straddle the pipe ends of these two piping elements, and the sealing member is compressed inward in the radial direction and these two. The two piping elements can be airtightly or liquidtightly connected by externally fitting the casing so that they abut on the annular bulge of the piping element and lock the two piping elements so that they do not separate from each other. can. That is, in this case, the pipe end on which the annular bulging portion of the pipe element is formed constitutes a part of the connection structure between the pipe expansion type pipe joint as the mechanical type pipe joint and the pipe element.

Further, if an annular bulge is not formed at either of the pipe ends of the two pipe elements to be connected, for connecting the two pipe elements, for example, a press type separate from the pipe element. It is necessary to use pipe fittings or expansion type pipe fittings. In the former case, since it is necessary to caulk each of the two piping elements inserted from both sides of the press type pipe joint, the effect of reducing the number of caulking processes cannot be achieved. That is, it is not possible to reduce the man-hours and difficulty of work at the construction site. On the other hand, in the latter case as well, since it is necessary to form an annular bulge at the pipe end of each of the two pipe elements inserted from both sides of the pipe expansion type pipe joint, the man-hours and difficulty of the work at the construction site are reduced. I can't.

As described above, an annular bulge is formed on only one of the pipe ends of the two connected pipe elements, or an annular bulge is formed on both of the pipe ends of the two connected pipe elements. The types of mechanical pipe fittings that can be adopted differ depending on whether or not an annular bulge is formed at either of the pipe ends of the two pipe elements to be connected. Therefore, if the positions of the pipe ends at which the annular bulges are formed are not uniform in each pipe element, the mechanical type pipe joint is provided according to the presence or absence of the annular bulge at the pipe end for each set of connected pipe elements. It is necessary to select the type of piping system, which makes the work of organizing the piping system complicated.

<Constitution>
Therefore, the second system is the first system described above, and is disposed on the most upstream side of the building piping system and the most downstream side of the building piping system among the plurality of piping elements. Building piping characterized in that an enlarged diameter portion and an annular bulging portion are uniformly formed only at the upstream pipe end or only at the downstream pipe end in all other piping elements except the piping element. It is a system.

As described above, in all the piping elements other than the piping elements arranged on the most upstream side and the downstream side among the plurality of piping elements constituting the second system, only the pipe end on the upstream side or the downstream side is used. The enlarged diameter portion and the annular bulging portion are uniformly formed. Regarding the piping elements arranged on the most upstream side and the downstream side among the plurality of piping elements constituting the second system, the diameter is uniformly expanded only to the upstream side or the downstream side pipe end like the other piping elements. The portion and the annular bulging portion may be formed. However, for the purpose of facilitating connection with pipes on the upstream side or the downstream side of the second system, for example, they are arranged on the most upstream side and the downstream side among a plurality of pipe elements constituting the second system. The arrangement of the pipe end where the annular bulge is formed in the pipe element may be different from that of other pipe elements.

In the first system 1 illustrated in FIG. 1, as described above, the connecting portions a to n, which are the portions where the annular bulging portions are formed, are located at the upstream end portions of the respective piping elements 2 to 15. It is formed integrally. That is, the first system 1 illustrated in FIG. 1 also has technical features as a second system.

<effect>
As described above, among the plurality of piping elements constituting the second system, the piping elements arranged on the most upstream side of the second system and the piping elements arranged on the most downstream side of the second system are excluded. In all the piping elements, the enlarged diameter portion and the annular bulging portion are uniformly formed only at the pipe end on the upstream side or only at the pipe end on the downstream side. Therefore, in the second system, regardless of the connection order of these piping elements, the pipes of the piping elements are combined by combining the piping elements having various structures according to the structure of the building or the like in which the second system is provided. Piping elements can be connected using a pressed pipe joint configured by the ends to freely design the fluid flow path defined by the second system.

Further, according to the second system, processing such as formation of an annular bulging portion at the manufacturing site of the piping element is also a unified work, which is efficient. Further, the connection between the piping elements at the construction site is also efficient because it is a unified work, and it leads to reduction of work mistakes, for example.

<< Third Embodiment >>
Hereinafter, a building piping system (hereinafter, may be referred to as a “third system”) according to a third embodiment of the present invention will be described.

As described above, in the system of the present invention including the first system, at least one of the mechanical type pipe joints is integrally formed with the enlarged diameter portion integrally formed at the pipe end of the piping element and the enlarged diameter portion. It is a press type pipe joint composed of an annular bulging portion formed in the above and an annular sealing member incorporated inside the annular bulging portion. When connecting piping elements using this press type pipe joint, an annular sealing member made of an elastic material is attached to the inside of the annular bulging portion formed in the enlarged diameter portion formed at the pipe end of the piping element. With the pipe ends of the other piping elements inserted into the enlarged diameter portion, caulking is performed on both sides of the annular bulge portion in the axial direction of the enlarged diameter portion and the annular bulging portion. Piping elements can be airtightly or liquidtightly connected. That is, the enlarged diameter portion in which the annular bulging portion of one of the piping elements is formed functions as a press type pipe joint. Therefore, the number of times of caulking can be halved as compared with the case of using a press-type pipe joint separate from the piping element, so that the construction work at the construction site can be significantly reduced.

However, depending on the combination of piping elements connected to form the system of the present invention and / or the combination of the system of the present invention and another piping system, it is desirable to adopt the expansion type pipe joint as the mechanical type pipe joint. There is. That is, the system of the present invention does not exclude the adoption of the expansion type pipe joint as the mechanical type pipe joint.

<Constitution>
Therefore, the third system is the above-mentioned first system, and is a building piping system characterized in that at least one of the mechanical type pipe joints is a pipe expansion type pipe joint having a casing and an annular seal member. Further, an annular bulging portion which is a portion that bulges outward in the radial direction over the entire circumference at a position separated by a predetermined distance from the pipe end of the two piping elements connected by the expansion type pipe joint. Is integrally formed, and the annular bulging portion is fixed so that the two piping elements are not separated from each other by being locked to the casing. In addition, the sealing member is housed in the casing and straddles the pipe ends of the two piping elements facing each other.

As described above, the expansion type pipe joint provided in the third system corresponds to a so-called "housing type pipe joint". As a result, even when it becomes necessary to connect the pipe ends having the annular bulging portion formed due to the design convenience of the fluid flow path defined by the third system, for example, it is used at the connection point. By adopting an expansion type pipe joint as a mechanical type pipe joint, these pipe ends can be connected to each other without any problem. It is sufficient that even an annular bulging portion is formed in the vicinity of the pipe ends of the two piping elements connected by the above-mentioned expansion type pipe joint, and it is not necessary that the above-mentioned enlarged diameter portion is formed. .. In other words, the annular bulge formed in the vicinity of the pipe end of the two pipe elements connected by the expansion type pipe joint may be formed on the pipe wall of the straight tubular pipe element, or described above. As described above, it may be formed in the enlarged diameter portion formed over a certain range at the pipe end of the pipe element.

However, from the viewpoint of facilitating the proper use of the pipe joint adopted as the mechanical type pipe joint according to the design of the flow path of the fluid defined by the third system as described above, the pipe of each pipe element. It is desirable that the position and shape of the annular bulge formed at the end be unified regardless of the type of the pipe joint adopted as the mechanical type pipe joint. As a result, regardless of whether the pipe joint adopted as the mechanical type pipe joint is a press type pipe joint or an expansion type pipe joint, an annular bulging portion having the same configuration can be commonly used. From this point of view, the diameter of the piping element connected by the expansion type pipe joint is expanded over a certain range at the pipe end of the pipe element, similarly to the piping element connected by the press type pipe joint. An annular bulge may be formed in the portion.

By the way, in the expansion type pipe joint (hereinafter, sometimes referred to as "conventional joint") according to the conventional technique widely used in the construction industry, a housing type pipe joint provided with a casting casing is generally used. Is used for Housing type pipe fittings equipped with a cast casing have been recognized for many years of use and high reliability, but they are both large in mass and size, and continuous improvement in terms of installation space and construction work is required. Has been done.

Therefore, in the technical field, as a solution to the above-mentioned problems, a lightweight and compact housing is formed by forming a housing type pipe joint by forming a thin plate made of metal (for example, stainless steel, etc.) instead of casting. It is known to provide shaped pipe fittings. In particular, the applicant of the present invention, in Japanese Patent Application No. 2020-62953 filed on March 31, 2nd year of the Ordinance, restrains the shape of the sealing member by externally fitting the casing constituting the housing type pipe joint to the sealing member. The inner casing is provided and the inner casing is divided into an outer casing that engages with a pair of pipes whose pipe ends face each other and presses the inner casing toward the seal member inside the seal member. We are proposing a small and lightweight casing type pipe joint that can achieve both the function of locking and the function of restraining the shape of the sealing member at a sufficiently high level.

FIG. 4A shows a pair of piping elements 211, a sealing member 110, a first casing 120, and a pair of second casings connected by an expansion type housing type pipe joint 101A having the above configuration. It is a schematic diagram which shows the positional relationship of the 2nd segment 131S. FIG. 4B shows the positional relationship between the outer peripheral portion 131P and the rim portion 131R of the second segment 131S in the housing type pipe joint 101A and the annular bulging portion 210D and the first casing 120 formed on the pair of piping elements 211. It is a schematic diagram which shows. In FIGS. 4A and 4B, the fastening member that forms the second casing by fastening the pair of second segments 131S and bringing them close to each other is omitted. Further, in FIG. 4A, only the contour and the through hole formed in the seating surface of the second segment 131S are drawn.

As illustrated in FIG. 4, in the housing type pipe joint 101A, the pipe ends of the pair of piping elements 211 are inserted from both sides in the direction of the axis AX of the so-called "self-sealing type" seal member 110 to be a seal member. Inside the 110, the pipe ends of the pair of pipe elements 211 face each other with a predetermined gap. Then, the first casing 120 (consisting of a plurality of first segments) is fitted onto the seal member 110 so as to cover the seal member 110. Further, two second segments 131S are arranged so as to cover the first casing 120. In this state, the adjacent second segments 131S are fastened to each other by a fastening member consisting of a bolt inserted into a through hole drilled in the seating surface of the flange portion 131F of the adjacent second segment 131S and a nut screwed with the bolt. do.

As a result of the above, the two second segments 131S are brought close to each other to assemble the second casing, and the plurality of first segments are brought close to each other to assemble the first casing 120. At this time, the plurality of first segments are pressed toward the seal member 110 by the outer peripheral portions 131P of the two second segments 131S, and the seal member 110 is pressed toward the pair of piping elements 211 by the outer peripheral portions of the first casing 120. Will be done. As a result, the outer surface shapes of the outer peripheral portion and the rim portion of the seal member 110 are constrained by the first casing 120, the pair of piping elements 211 are liquid-tightly or airtightly connected, and the two second segments 131S each have two. The inner surface of the rim portion 131R and the outer surface of the annular bulging portion 210D each of the pair of piping elements 211 are in contact with each other, so that the pair of piping elements 211 are locked so as not to be separated from each other.

<effect>
As described above, even when it becomes necessary to connect the pipe ends having the annular bulging portion formed due to the design convenience of the fluid flow path defined by the third system, for example, at the connection point. By adopting an expansion type pipe joint as the mechanical type pipe joint used, these pipe ends can be connected to each other without any problem. Therefore, according to the third system, piping elements having various structures can be freely selected according to the structure of the building or the like in which the third system is provided, without being limited to the position of the pipe end where the annular bulge is formed. In combination with, the flow path of the fluid defined by the third system can be freely designed.

<< Fourth Embodiment >>
Hereinafter, a building piping system (hereinafter, may be referred to as a “fourth system”) according to a fourth embodiment of the present invention will be described.

Regardless of whether the pipe joint adopted as the mechanical type pipe joint constituting the system of the present invention is a press type pipe joint or a pipe expansion type pipe joint, the pipe elements are airtightly or liquid-tightly connected and do not separate from each other. In order to be locked in such a manner, the piping element needs to be inserted to a predetermined position inside the pipe joint. In other words, in order for the piping elements to be airtightly or liquid-tightly connected and locked so as not to be separated from each other, it is necessary to set the mutual insertion allowance of the piping elements into the pipe joint to a predetermined appropriate amount. be.

Further, in order to construct a flow path having a desired structure extending two-dimensionally or three-dimensionally in the system of the present invention, the pipe elements and pipes around the axis common to the connected pipe elements and pipe joints are to be constructed. It is necessary to set the relative rotation angle with the joint to a predetermined appropriate angle. In order to achieve this, it is necessary to make a predetermined appropriate amount of relative indexing between the pipe element having a part constituting the two-dimensional or three-dimensional structure and the pipe joint.

<Constitution>
Therefore, the fourth system is any one of the above-mentioned first system to the third system, and the first mark is placed on the outer peripheral surface of at least one piping element and / or the mechanical type pipe joint connected to the piping element. It is a building piping system characterized by being displayed. The first mark is a mark corresponding to the mutual insertion allowance and / or mutual indexing necessary for connecting the piping element and the mechanical type pipe joint. In other words, the first mark indicates that the worker connecting the piping element and the mechanical fitting has a predetermined appropriate amount of mutual insertion allowance and / or mutual indexing between the piping element and the mechanical fitting. It is a mark that can be used to.

The first mark may be a mark corresponding to both the mutual insertion allowance and the mutual indexing required for connecting the piping element and the mechanical type pipe joint, or either the mutual insertion allowance and the mutual indexing. It may be a mark corresponding to one.

As a specific example of the first mark as a mark corresponding to the mutual insertion allowance required for connecting the piping element and the mechanical type pipe joint, for example, the pipe element is inserted to a predetermined position inside the mechanical type pipe joint. Marks such as lines displayed on the outer peripheral surface of the piping element may be mentioned so as to indicate the position where the end portion of the pipe joint reaches in the state of being. On the other hand, as a specific example of the first mark as a mark corresponding to the mutual indexing required for the connection between the piping element and the mechanical type pipe joint, for example, only a relatively predetermined appropriate angle around a common shaft. Marks such as lines displayed on the outer peripheral surfaces of both the piping element and the pipe joint so as to face each other in the rotated (indexed) state can be mentioned. The first mark as a mark corresponding to the mutual insertion allowance and the first mark as a mark corresponding to mutual indexing may be displayed separately or integrally. ..

The specific method for displaying the first mark on the outer peripheral surface of the piping element and / or the mechanical type pipe joint can withstand the usage environment and usage conditions in the application as a building piping system. Moreover, it is not particularly limited as long as it is configured to be usable (for example, by visual inspection) in the work of connecting the piping element and the mechanical type pipe joint. For example, the first mark can be displayed on the outer peripheral surface of the piping element and / or the mechanical type pipe joint by various methods such as printing with ink or paint, sticking a sticker or the like, or engraving. In addition, when the first mark is realized by attaching a sticker, various information such as identification information (for example, ID number, etc.) of each piping element is printed on the sticker and displayed by the operator. It may be possible to visually confirm it.

In FIG. 5, when two piping elements out of a plurality of piping elements constituting the fourth system are connected by a press type pipe joint, the first mark is used and mutual insertion allowance and mutual indexing are predetermined. It is a schematic diagram which shows the state which is considered to be an appropriate amount. FIG. 5 is a diagram corresponding to FIG. 3 referenced in the description of the first system. That is, a press type is provided by the enlarged diameter portion 16e and the annular bulging portion 16b formed at the pipe end on the upstream side of the piping element 16 and the annular sealing member (not shown) incorporated inside the annular bulging portion 16b. A pipe joint 41 is formed. On the other hand, the vicinity of the pipe end on the downstream side of the pipe element 17 has a straight tubular shape.

However, in FIG. 5 relating to the fourth system, the line segment 16i as a mark corresponding to the mutual indexing necessary for the connection between the piping element 16 and the piping element 17 (mechanical type pipe joint 41 formed at the pipe end of the pipe element 17). And 17i are displayed on the outer peripheral surface of the pipe end on the upstream side of the pipe element 16 and on the outer peripheral surface on the downstream side of the pipe element 17, respectively. Further, on the outer peripheral surface on the downstream side of the pipe element 17, the end portion of the pipe joint (that is, the pipe end of the pipe element 16) in a state where the pipe element is inserted to a predetermined position inside the mechanical pipe joint 41. The line segment 17o that displays the position of is displayed.

When connecting the piping element 16 and the piping element 17, as shown in the figure by the black arrow, the piping element 17 is inside the enlarged diameter portion 16e formed at the pipe end on the upstream side of the piping element 16. The pipe end on the downstream side of is inserted. At this time, the piping element 16 and the piping element are inserted by inserting the piping element 17 into the piping element 16 until the pipe end of the piping element 16 (the end of the mechanical type pipe joint 41 formed in the pipe element 16) reaches the line segment 17o. The insertion allowance required for the 17 to be airtightly or liquidtightly connected and locked so as not to be separated from each other can be easily and surely achieved. Further, the line segment 16i and the line segment 17i are opposed to each other (the line segment 16i and the line segment 17i are present at the same positions in the circumferential direction to form one line segment parallel to the axial direction), so that the pipe element 16 and the pipe element 17 are separated from each other. It is possible to easily and reliably achieve a state of being rotated (indexed) by a relatively predetermined appropriate angle around a common axis. Next, while this state is maintained, both side portions (see the shaded portion shown in the figure) sandwiching the annular bulging portion 16b in the axial direction of the annular bulging portion 16b and the enlarged diameter portion 16e are diameter-reduced (see the shaded portion shown in the figure). By caulking), the piping element 16 and the piping element 17 are airtightly or liquidtightly connected.

<effect>
As described above, in the fourth system, at least one pipe element and / or the outer peripheral surface of the mechanical pipe joint connected to the pipe element is required for connecting the pipe element and the mechanical pipe joint. The first mark, which is a mark corresponding to the mutual insertion allowance and / or mutual indexing, is displayed. Therefore, when the operator recognizes and uses the first mark in the work of connecting the piping element and the mechanical type pipe joint, the insertion allowance and / Alternatively, the indexing amount can be easily and surely achieved. In addition, in FIG. 5 and the above description, the 4th system in which the press type pipe joint is adopted as the mechanical type pipe joint in which the 1st mark is displayed is illustrated, but the mechanical type pipe joint in which the 1st mark is displayed is illustrated. It may be a pipe expansion type pipe joint. That is, the mechanical type pipe joint on which the first mark is displayed is not limited to the press type pipe joint, and the first mark may be displayed on the expansion type pipe joint.

<< Fifth Embodiment >>
Hereinafter, a building piping system (hereinafter, may be referred to as a “fifth system”) according to a fifth embodiment of the present invention will be described.

As described above, in the system of the present invention including the first system, piping elements having various structures are combined according to the structure of the building or the like in which the system of the present invention is provided, and defined by the system of the present invention. The flow path of the fluid can be freely designed. In order to accurately reflect such a design and accurately organize the system of the present invention, it is necessary for the supervisor and the operator to correctly recognize the construction procedure and the construction sequence of each piping element in the system of the present invention. ..

In addition, when connecting the mechanical type pipe joint and the pipe element in a liquidtight or airtight manner, in the case of a press type pipe joint, when caulking the annular bulging portion and its vicinity, in the case of a pipe expansion type pipe joint, When fastening the segments constituting the casing, it is necessary to apply a force of an appropriate magnitude (hereinafter, may be referred to as "connecting machining force"). However, it is not easy to surely grasp the appropriate connection processing force for each work at the construction site, and there is a risk that the construction work will be complicated and the labor will increase.

Furthermore, at the time of inspection at the completion of construction of the system of the present invention or maintenance after a certain period of time has passed from the construction, the construction history such as the connection processing force in the actual work at the construction site is accurate for each connection location. It is important that it is recorded. However, it is not easy to accurately and surely record the construction history of each connection point in the actual work at the construction site, and there is a risk that the construction work and the maintenance work will be complicated and the labor will be increased.

<Constitution>
Therefore, the fifth system is any one of the first system to the fourth system described above, and is characterized in that at least a part of the plurality of piping elements includes an RF tag capable of writing and reading electronic data. It is a building piping system. The electronic data corresponds to at least one selected from the group consisting of identification information of individual piping elements, construction position information, construction procedure information, and construction history information.

The RF tag is a tag constituting an RFID (Radio Frequency Identification) system capable of rewriting and / or reading various electronic data in a non-contact manner using radio waves and / or electromagnetic waves, for example. The RF tag contains, for example, an antenna, a control circuit, a memory, and the like, and can supply power and exchange data in a non-contact manner by radio waves from a reader / writer and / or electromagnetic induction. Various forms of RF tags are known in the art, but as the RF tag included in the piping element constituting the fifth system, for example, a sticker-shaped (label type) RF tag is preferable, and the outer peripheral surface of the piping element is preferable. It is preferable to dispose the RF tag in the. Further, the identification information (for example, ID number, etc.) of the piping element may be displayed on the sticker-shaped RF tag by a method such as printing, and may be visually confirmed by the operator. Further, the sticker-shaped RF tag may have a function as the first mark described above.

In the schematic diagram illustrating the configuration of the piping element 14 among the plurality of piping elements constituting the first system illustrated in FIG. 2 described above, the upstream side of the first pipe 21 constituting the piping element 14 A press connection portion l as a mechanical pipe joint is integrally formed at an end portion (pipe end), and an RF tag 30 is arranged on an outer peripheral surface on the downstream side of the press connection portion l. Since the piping element is made of metal, the RF tag is attached directly to the surface of the piping element or indirectly via a film body having a magnetic shielding function.

When the electronic data corresponding to the construction history information is automatically recorded in the RF tag, for example, a sensor configured to output a detection signal corresponding to the connection processing force applied to the piping element may be used. It may be equipped with a processing tool or the like. In this case, the RF tag may be configured to record information corresponding to the detection signal output from the sensor as data. Specific examples of the sensor include a pressure sensor, a stress sensor, a strain gauge, and the like. Details of such sensors and RF tags are well known to those skilled in the art, and thus description thereof will be omitted here. The portion where these sensors are arranged is appropriately determined according to the information to be detected by these sensors. The sensor and the RF tag may be configured as a separate device electrically connected by, for example, a signal line or the like, or may be configured as an integrated device.

<effect>
As described above, in the fifth system, at least a part of the plurality of piping elements is selected from the group consisting of identification information, construction position information, construction procedure information, and construction history information of each piping element. It is equipped with an RF tag capable of writing and reading electronic data, which is the corresponding data.

Therefore, by reading the identification information and construction position information of each piping element by the corresponding reader / writer, the operator can correctly recognize the arrangement, posture, construction order, etc. of each piping element, and the desired design is accurate. It becomes easy to accurately organize the piping system reflected in. Furthermore, by reading the identification information of each piping element and the construction procedure information with the corresponding reader / writer, the operator can surely grasp the appropriate connection processing force for each work at the construction site, and the mechanical type pipe. The work of connecting the joint and the piping element in a liquid-tight or airtight manner can be facilitated. In addition, by reading the identification information and construction history information of each piping element by the corresponding reader / writer, the construction work and maintenance work are not complicated and the labor is not increased, and the construction of the fifth system is completed at the time of completion. It is possible to improve the efficiency and accuracy of work such as inspection or maintenance. In the future, it is expected that construction sites where construction work is assisted by robots and unmanned construction sites where construction work is performed only by robots will appear. Even at such a construction site, the provision of an RF tag is useful.

<< 6th Embodiment >>
Hereinafter, a method of constructing a building piping system according to a sixth embodiment of the present invention (hereinafter, may be referred to as a “sixth method”) will be described.

As mentioned at the beginning of this specification, the present invention relates not only to a building piping system but also to a method of constructing the system.

<Constitution>
The sixth method is a construction method of a building piping system composed of a plurality of piping elements connected to each other by a mechanical type pipe joint, and is characterized by including a manufacturing process, a transfer process, and a construction process listed below. This is the construction method of the building piping system.

Manufacturing process: An annular portion that bulges outward in the radial direction over the entire circumference at a position separated from at least one pipe end of at least one pipe element constituting a building piping system at a manufacturing site. A process involving the integral formation of a bulge.
Transfer process: The process of transferring piping elements and mechanical fittings from the manufacturing site to the construction site of a building piping system.
Construction process: A process of forming a building piping system by connecting multiple piping elements transferred in the transfer process to each other at a construction site using mechanical pipe fittings.

Further, in the sixth method, the pipe end on which the annular bulging portion of the pipe element is formed constitutes a part of the mechanical pipe joint.

As described above, the sixth method is a construction method of a building piping system composed of a plurality of piping elements connected to each other by a mechanical type pipe joint. As described in the above description of the first system, at least a part of the plurality of piping elements may be connected so as to form a flow path extending two-dimensionally or three-dimensionally. Further, at least one of the plurality of piping elements may further include at least one portion selected from the group consisting of a bent portion, a branch portion, a gradual change portion, and a low rigidity portion. In addition, at least a portion of the plurality of piping elements may be made of ferritic stainless steel. Since the details of the piping element and the annular bulging portion have already been described in the above-mentioned description of the first system, the description thereof will be omitted here.

In the manufacturing process, for example, at a manufacturing site such as a factory, it swells outward in the radial direction over the entire circumference at a position separated from at least one pipe end of a pipe element constituting a building piping system by a predetermined distance. An annular bulging portion, which is a protruding portion, is integrally formed with the enlarged diameter portion.

In the transfer process, piping elements and mechanical fittings are transferred from the manufacturing site to the construction site of the building piping system. That is, the construction site is a place different from the above-mentioned manufacturing site. At this time, for example, the transfer form of the piping element and the mechanical pipe joint can be appropriately determined according to the loading capacity of the transfer means, the size of the work space at the construction site, the permissible man-made, and the like. For example, the entire number of the plurality of piping elements may be transferred as a single item, or some of the plurality of piping elements may be transferred as a connected unit.

In the construction process, a plurality of piping elements transferred in the transfer process are connected to each other by mechanical pipe joints at the construction site to form a building piping system. At this time, since the annular bulging portion is already formed at the at least one pipe end of the pipe element with high processing accuracy by the above-mentioned manufacturing process, the man-hours and difficulty of the work at the construction site are greatly reduced. .. Further, when the press type pipe joint is configured by the pipe end in which the enlarged diameter portion and the annular bulging portion of the pipe element are formed as described in the above description of the first system, the press type pipe joint is separate from the pipe element. Compared to the case of using a press type pipe joint, the number of caulking processes can be halved.

In the sixth method, "the pipe end on which the annular bulge of the piping element is formed constitutes a part of the mechanical pipe joint" literally means "the annular bulge of the piping element is formed". Not only in the state where the pipe end forms part of the mechanical pipe joint, but also in the state where the pipe end on which the annular bulge of the piping element is formed is the mechanical pipe joint formed in the construction process. It also refers to the state of "forming a part of the connection structure with the piping element".

For example, when a press type pipe joint is adopted as a mechanical pipe joint, an annular seal member made of an elastic material inside an annular bulge formed in a diameter-expanded portion formed at the pipe end of a piping element ( O-ring) is attached, and while the pipe ends of other piping elements are inserted into the enlarged diameter portion, caulking is performed on both sides of the annular bulge and the annular bulge in the axial direction of the enlarged diameter portion. To connect these two piping elements airtightly or liquidtightly. That is, in this case, an enlarged diameter portion and an annular bulging portion are formed at the pipe end of one of the two pipe elements to be connected, and the enlarged diameter portion and the annular bulging portion are formed at the pipe end of the other pipe element. The annular bulging portion is not formed, and the enlarged diameter portion in which the annular bulging portion of the former piping element is formed functions as a press type pipe joint. In other words, in this case, in the connecting portion of these two piping elements, the enlarged diameter portion, which is the pipe end where the annular bulging portion of one piping element is formed, is a press type pipe joint as a mechanical type pipe joint. It constitutes a part of.

On the other hand, for example, when an expansion type pipe joint, which is a kind of housing type pipe joint, is adopted as the mechanical type pipe joint, the pipe end on the side where the annular bulging portion of the two piping elements to be connected is formed. An annular sealing member made of an elastic material is attached so as to face each other and straddle the pipe ends of these two piping elements, and the sealing member is compressed inward in the radial direction and these two piping elements are used. By externally fitting the casing in contact with the annular bulge of the two pipe elements, the two pipe elements are locked so as not to be separated from each other, and the two pipe elements are airtightly or liquid-tightly connected. That is, in this case, the pipe end on which the annular bulging portion of the pipe element is formed constitutes a part of the connection structure between the pipe expansion type pipe joint as the mechanical type pipe joint and the pipe element.

FIG. 6 is a flowchart showing an example of the flow of each step in the sixth method. In an actual building piping system, individual piping elements are manufactured at a manufacturing site such as a factory based on the piping construction drawing of the piping system, and these piping elements are connected at the construction site to form the piping system. Will be done. In the above process (sometimes referred to as a "prefabricated process") in which a piping element is manufactured at a manufacturing site, individual piping elements (sometimes referred to as a "prefabricated product") may be referred to from the above piping construction drawing. ) Is created as a single item (drawing for each piping element), and the manufacturing process is advanced based on the design drawing. However, in the following description, the work related to the design drawing as described above will be omitted, and each process after the manufacturing process will be described.

As illustrated in FIG. 6, when the manufacturing of the building piping system by the sixth method is started, the manufacturing process is first executed in step S10. In the manufacturing process, as described above, at the manufacturing site, at a position separated from at least one pipe end of at least one pipe element constituting the building piping system by a predetermined distance, the entire circumference is directed outward in the radial direction. An annular bulging portion, which is a bulging portion, is integrally formed. When a press-type pipe joint is formed by a pipe end having an annular bulge of a pipe element as described above, it covers a certain range at at least one pipe end of the pipe element constituting a building piping system. The enlarged diameter portion is integrally formed, and the annular bulging portion, which is a portion that bulges outward in the radial direction over the entire circumference, is integrally formed with the enlarged diameter portion. The manufacturing site is different from the construction site, and specific examples of the manufacturing site include factories that can perform processing necessary for manufacturing piping elements such as formation of annular bulging portions. .. For example, in a construction site where there are restrictions in terms of work space, processing equipment, etc., it is impossible or difficult to form an enlarged diameter portion and an annular bulging portion at the pipe end of a piping element. However, in the sixth method, an annular bulging portion (and, in some cases, a diameter-expanded portion) can be formed efficiently and with high accuracy at the pipe end of the piping element at a manufacturing site different from the construction site. .. The details of the configuration of the piping element manufactured in the manufacturing process and the method of forming the enlarged diameter portion and the annular bulging portion have already been described, for example, in the description of the first system, and thus the description thereof will be omitted here.

Next, the transfer step is executed in step S20. In the transfer process, piping elements and mechanical fittings are transferred from the manufacturing site to the construction site of the building piping system. At this time, as described above, the transfer form of the piping element and the mechanical pipe joint can be appropriately determined according to, for example, the loading capacity of the transfer means, the size of the work space at the construction site, the permissible man-made, and the like. For example, the entire number of the plurality of piping elements may be transferred as a single item, or some of the plurality of piping elements may be transferred as a connected unit.

Next, the construction process is executed in step S30. In the construction process, a plurality of piping elements transferred from the manufacturing site to the construction site in the transfer process are connected to each other by mechanical pipe joints to form a building piping system having a desired structure. At this time, by the manufacturing process executed at the manufacturing site as step S10, an annular bulging portion (and a diameter-expanded portion in some cases) is already formed at at least one pipe end of the piping element with high processing accuracy. .. Therefore, the man-hours and difficulty of the work at the construction site are greatly reduced. In particular, as described above, when the press-type pipe joint is formed by the pipe end in which the enlarged diameter portion and the annular bulge portion of the pipe element are formed, the press-type pipe joint separate from the pipe element is used. Compared with, the number of times of caulking can be halved.

On the other hand, when an expansion type pipe joint is used as a mechanical type pipe joint, the enlarged diameter portion is not essential, but the annular bulge is formed on both of the two opposite pipe ends of the two pipe elements connected by the pipe joint. The part needs to be formed. However, as described above, in the sixth method, the annular bulging portion is integrally formed in advance at at least one pipe end of the pipe element constituting the building piping system at the manufacturing site. Therefore, a construction method of a building piping system according to a conventional technique (hereinafter, "conventional method") in which it is necessary to form an annular bulge at both of two facing pipe ends of two piping elements connected at a construction site. Compared to (sometimes referred to as)), the labor and difficulty of work at the construction site are significantly reduced.

<effect>
As described above, according to the sixth method, in the construction method of a building piping system formed by connecting piping elements using mechanical pipe fittings, it is possible to significantly reduce the construction work at the construction site. can. Further, since the piping element is manufactured in advance at a manufacturing site different from the construction site, an annular bulging portion can be formed efficiently and with high accuracy at at least one pipe end of the piping element.

<< 7th Embodiment >>
Hereinafter, a construction method of a building piping system according to a seventh embodiment of the present invention (hereinafter, may be referred to as a “seventh method”) will be described.

As described above, the sixth method is a construction method of a building piping system composed of a plurality of piping elements connected to each other by a mechanical type pipe joint. According to the sixth method, an annular bulging portion is integrally formed in advance at at least one pipe end of a pipe element constituting a building piping system at a manufacturing site. As a result, it is possible to improve the processing accuracy of the annular bulging portion and reduce the man-hours and difficulty of the work at the construction site.

When connecting a piping element using a press type pipe joint as a mechanical pipe joint, an annular bulge formed in a diameter-expanded portion integrally formed over a certain range at the pipe end of the piping element. An annular sealing member made of an elastic material is attached to the inside of the portion, and the annular bulging portion is sandwiched in the axial direction of the enlarged diameter portion while the pipe ends of other piping elements are inserted into the enlarged diameter portion. These two piping elements can be airtightly or liquidtightly connected by caulking the portion and the annular bulge. That is, an enlarged diameter portion and an annular bulging portion are formed on one of the two opposite pipe ends of the two connected piping elements, and the enlarged diameter portion and the annular bulging portion are not formed on the other. The enlarged diameter portion in which the annular bulging portion of the former piping element is formed functions as a press type pipe joint. In other words, in the connecting portion of these two piping elements, the pipe end in which the enlarged diameter portion and the annular bulging portion of one piping element are formed constitutes a part of the press type pipe joint as a mechanical type pipe joint. are doing.

However, if annular bulges are formed at both of the pipe ends of the two pipe elements to be connected, then the pipe end of one pipe element (the enlarged diameter formed at) of the other pipe element The pipe end cannot be inserted. Therefore, in this case, the pipe end on which the annular bulge is formed cannot function as a press type pipe joint. Incidentally, in this case, for example, if an expansion type pipe joint is adopted as the mechanical pipe joint, the pipe ends on the side where the annular bulge of the two pipe elements to be connected are formed are opposed to each other, and these 2 An annular sealing member made of an elastic material is attached so as to straddle the pipe ends of the two piping elements, and the sealing member is compressed inward in the radial direction and hits the annular bulging portion of these two piping elements. The two piping elements can be airtightly or liquidtightly connected by fitting the casing so as to be in contact with each other so that the two piping elements are locked so as not to be separated from each other. That is, in this case, the pipe end on which the annular bulging portion of the pipe element is formed constitutes a part of the connection structure between the pipe expansion type pipe joint as the mechanical type pipe joint and the pipe element.

Further, if an annular bulge is not formed at either of the pipe ends of the two pipe elements to be connected, for connecting the two pipe elements, for example, a press type separate from the pipe element. It is necessary to use pipe fittings or expansion type pipe fittings. In the former case, since it is necessary to caulk each of the two piping elements inserted from both sides of the press type pipe joint, the effect of reducing the number of caulking processes cannot be achieved. That is, it is not possible to reduce the man-hours and difficulty of work at the construction site. On the other hand, in the latter case as well, since it is necessary to form an annular bulge at the pipe end of each of the two pipe elements inserted from both sides of the pipe expansion type pipe joint, the man-hours and difficulty of the work at the construction site are reduced. Can't.

As described above, an annular bulge is formed on only one of the pipe ends of the two connected pipe elements, or an annular bulge is formed on both of the pipe ends of the two connected pipe elements. The types of mechanical pipe fittings that can be adopted differ depending on whether or not an annular bulge is formed at either of the pipe ends of the two pipe elements to be connected. Therefore, when the positions of the pipe ends where the annular bulges are formed are not uniform in each pipe element, the mechanical type pipe joint is made according to the presence or absence of the annular bulge at the pipe end for each combination of the connected pipe elements. It is necessary to select the type of piping system, which makes the work of organizing the piping system complicated.

<Constitution>
Therefore, the seventh method is the sixth method described above, and is arranged on the most upstream side of the building piping system and the most downstream side of the building piping system among the plurality of piping elements. A method for constructing a building piping system, characterized in that an annular bulge is uniformly formed only at the upstream pipe end or only at the downstream pipe end in all other piping elements except the piping element. Is.

As described above, in all the piping elements other than the piping elements arranged on the most upstream side and the downstream side among the plurality of piping elements constituting the building piping system organized by the seventh method, the upstream side. Alternatively, an annular bulge is uniformly formed only at the end of the pipe on the downstream side. Of the plurality of piping elements constituting the system, the piping elements arranged on the most upstream side and the downstream side are uniformly annularly bulged only at the upstream side or downstream side pipe end like other piping elements. The portions may be formed. However, for the purpose of facilitating connection with pipes on the upstream side or the downstream side of the system, for example, they are arranged on the most upstream side and the downstream side among a plurality of piping elements constituting the system. The arrangement of the pipe end at which the annular bulge is formed in the pipe element may be different from that of other pipe elements.

As described in the description of the second system described above, in the first system 1 exemplified in FIG. 1, the connecting portions a to n, which are the portions where the annular bulging portions are formed, are the respective piping elements 2 to. It is integrally formed at the upstream end of 15. That is, the first system 1 illustrated in FIG. 1 also has technical features as a building piping system organized by the seventh method.

<effect>
As described above, among the plurality of piping elements constituting the building piping system organized by the seventh method, the piping elements arranged on the most upstream side of the system and the piping elements arranged on the most downstream side of the system. In all the other piping elements except the piping element, the annular bulging portion is uniformly formed only at the pipe end on the upstream side or only at the pipe end on the downstream side. Therefore, in the seventh method, regardless of the connection order of these piping elements, the piping elements having various structures are combined according to the structure of the building or the like in which the system is provided, and the pipe end of the piping element is combined. Piping elements can be connected using mechanical pipe fittings constructed by the system to freely design the fluid flow path defined by the system.

Further, in the seventh method, processing such as formation of an annular bulging portion at the manufacturing site of the piping element is also a unified work, which is efficient. Further, the connection between the piping elements at the construction site is also efficient because it is a unified work, and it leads to reduction of work mistakes, for example. As described above, when the press type pipe joint is formed by the pipe end on which the annular bulge portion of the piping element is formed, it is constant at the pipe end on the side where the annular bulge portion of the piping element is formed. It is necessary that the enlarged diameter portion is formed over the range and the annular bulging portion is formed in the enlarged diameter portion.

<< Eighth Embodiment >>
Hereinafter, the construction method of the building piping system according to the eighth embodiment of the present invention (hereinafter, may be referred to as “eighth method”) will be described.

As described above, in the construction method (method of the present invention) of the building piping system according to the present invention including the sixth method, the annular swelling of the piping element constituting the connection portion between the mechanical type pipe joint and the piping element. The pipe end on which the protrusion is formed constitutes a part of the mechanical pipe joint. By integrally forming this annular bulging portion at the pipe end of the piping element at a manufacturing site such as a factory, it is possible to improve the processing accuracy of the annular bulging portion and reduce the man-hours and difficulty of the work at the construction site. can.

Further, as the mechanical type pipe joint, for example, a press type pipe joint and / or an expansion type pipe joint can be adopted as described above. In particular, when the press-type pipe joint is configured by the pipe end on which the annular bulge of the pipe element is formed, the number of times of caulking is increased as compared with the case where the press-type pipe joint separate from the pipe element is used. Since it can be halved, the construction work at the construction site can be significantly reduced.

<Constitution>
Therefore, the eighth method is the sixth method or the seventh method described above, and at least one of the mechanical type pipe joints is a press type pipe formed by a pipe end on which an annular bulge of a pipe element is formed. It is a construction method of a building piping system characterized by being a joint. More specifically, it is a construction method of a building piping system, characterized in that at least one of the mechanical pipe fittings is a press type pipe fitting formed by a pipe end having an annular bulge of a piping element formed therein. .. More specifically, at least one of the mechanical type pipe fittings is integrally formed with a diameter-expanded portion integrally formed over a certain range at one pipe end of a piping element and the diameter-expanded portion. It is a press-type pipe joint composed of an annular bulging portion and an annular sealing member incorporated inside the annular bulging portion.

Further, in the construction process included in the eighth method, the annular bulging portion of the second element, which is another piping element different from the first element, which is the piping element constituting the press type pipe joint, is not formed. The first element and the second element are pressed by reducing the diameter of at least a part of the annular bulging portion and the enlarged diameter portion of the first element while the pipe end is inserted into the enlarged diameter portion of the first element. Fasten with pipe fittings.

The process in which the first element and the second element are fastened by the press type pipe joint in the construction process is the same as the schematic diagram shown in FIG. 3 referred to in the above-mentioned description of the third system. Therefore, further description of the eighth method will be omitted.

<effect>
As described above, in the building piping system organized by the eighth method, at least one of the mechanical type pipe joints is a press type pipe joint composed of pipe ends formed with annular bulges of pipe elements. be. Since the piping element in which the press-type pipe joint is formed by the pipe end on which the annular bulge is formed is integrally formed with the press-type pipe joint, caulking for connecting to other pipe elements. Machining only needs to be done on other piping elements that are inserted into the press fitting. That is, according to the eighth method, for a pipe element in which a press-type pipe joint is formed by a pipe end on which an annular bulge is formed, the number of times of caulking for connection with other pipe elements is conventionally performed. Can be halved compared to. Therefore, in the mechanical pipe fittings constituting the building piping system organized by the eighth method, the proportion occupied by the press type pipe joints formed by the pipe ends formed by the annular bulges of the piping elements increases. The number of times of caulking at the construction site can be reduced, and the workload at the construction site can be significantly reduced.

<< 9th Embodiment >>
Hereinafter, the construction method of the building piping system according to the ninth embodiment of the present invention (hereinafter, may be referred to as “the ninth method”) will be described.

In the building piping system organized by the above-mentioned eighth method, at least one of the mechanical type pipe joints is integrally formed with the enlarged diameter portion integrally formed at the pipe end of the piping element and the enlarged diameter portion. It is a press-type pipe joint composed of an annular bulging portion formed therein and an annular sealing member incorporated inside the annular bulging portion. When connecting piping elements using this press type pipe joint, an annular sealing member made of an elastic material is attached to the inside of the annular bulging portion formed in the enlarged diameter portion formed at the pipe end of the piping element. With the pipe ends of the other piping elements inserted into the enlarged diameter portion, caulking is performed on both sides of the annular bulge portion in the axial direction of the enlarged diameter portion and the annular bulging portion. Piping elements can be airtightly or liquidtightly connected. That is, the enlarged diameter portion in which the annular bulging portion of one of the piping elements is formed functions as a press type pipe joint. Therefore, the number of times of caulking can be halved as compared with the case of using a press-type pipe joint separate from the piping element, so that the construction work at the construction site can be significantly reduced.

However, depending on the combination of piping elements connected to form the building piping system and / or the combination of the building piping system and other piping systems, the expansion type pipe joint may be adopted as the mechanical type pipe joint. May be desirable. That is, the construction method of the building piping system according to the present invention (the method of the present invention) does not exclude the adoption of the expansion type pipe joint as the mechanical type pipe joint.

<Constitution>
Therefore, the ninth method is any one of the above-mentioned sixth to eighth methods, and is characterized in that at least one of the mechanical type pipe joints is a pipe expansion type pipe joint having a casing and an annular seal member. This is a construction method for a building piping system. Further, in the construction process included in the ninth method, the pipe end on the side where the annular bulging portion of the two piping elements connected by the expansion type pipe joint is formed is inserted into the casing and the inside of the casing. The sealing member is straddled on the two pipe ends facing each other in the casing, and the annular bulging portions of the two piping elements facing each other in the casing are respectively locked by the casing. The two piping elements are fixed so as not to be separated from each other.

As described above, the expansion type pipe joint as the mechanical type pipe joint constituting the building piping system organized by the ninth method corresponds to the so-called "housing type pipe joint". As a result, for example, when it becomes necessary to connect the pipe ends having the annular bulging portion formed due to the design convenience of the fluid flow path defined by the building piping system organized by the ninth method. However, by adopting an expansion type pipe joint as the mechanical type pipe joint used at the connection point, these pipe ends can be connected to each other without any problem. As described above, it is sufficient that an annular bulging portion is formed in the vicinity of the pipe ends of the two piping elements connected by the pipe expansion type pipe joint, and the above-mentioned enlarged diameter portion is formed. There is no need. In other words, the annular bulge formed near the pipe end of the two pipe elements connected by the expansion type pipe joint may be formed on the pipe wall of the straight tubular pipe element, or as described above. As described above, it may be formed in the enlarged diameter portion formed over a certain range at the pipe end of the pipe element.

However, from the viewpoint of facilitating the proper use of pipe joints adopted as mechanical pipe joints according to the design of the fluid flow path defined by the building piping system organized by the ninth method as described above. It is desirable that the position and shape of the annular bulge formed at the pipe end of each pipe element be unified regardless of the type of pipe joint adopted as the mechanical type pipe joint. As a result, regardless of whether the pipe joint adopted as the mechanical type pipe joint is a press type pipe joint or an expansion type pipe joint, an annular bulging portion having the same configuration can be commonly used. From such a viewpoint, the diameter of the pipe element connected by the expansion type pipe joint is expanded over a certain range at the pipe end of the pipe element, similarly to the pipe element connected by the press type pipe joint. An annular bulge may be formed in the portion.

As a specific example of the expansion type pipe joint that can be used in the ninth method, as illustrated in the above-mentioned description of the third system, for example, a casting casing widely used in the construction industry is used. A housing type pipe fitting provided can be mentioned. Further, as illustrated with reference to FIG. 4 in the above description of the third system, a lightweight and compact housing shape configured by forming a thin plate made of metal (for example, stainless steel, etc.) instead of casting. A pipe joint may be used.

<effect>
As described above, even when it becomes necessary to connect the pipe ends having the annular bulging portion due to the design convenience of the fluid flow path defined by the building piping system, for example, the ninth method. In, by adopting an expansion type pipe joint as the mechanical type pipe joint used at the connection point, these pipe ends can be connected to each other without any problem. Therefore, according to the ninth method, a piping element having various structures is provided according to the structure of a building or the like in which a building piping system is provided, without being limited to the position of the pipe end where the annular bulge is formed. It can be freely combined to design the flow path of the fluid defined by the system.

<< 10th Embodiment >>
Hereinafter, a construction method of a building piping system according to a tenth embodiment of the present invention (hereinafter, may be referred to as a “tenth method”) will be described.

As described above, the method of the present invention including the above-mentioned sixth method includes a manufacturing process, a transfer process, and a construction process. According to the method of the present invention, the above-mentioned manufacturing process is performed in advance at a manufacturing site such as a factory located at a place different from the construction site, and an annular bulging portion is formed at at least one pipe end of a pipe element constituting a building piping system. Is formed integrally. As a result, in the construction method of a building piping system formed by connecting piping elements to each other using a mechanical type pipe joint, it is possible to significantly reduce the construction work at the construction site. In addition, an annular bulge can be formed efficiently and with high accuracy at at least one pipe end of the pipe element.

Achieve higher quality in terms of mutual alignment of multiple piping elements that make up the building piping system organized at the construction site, connection strength, liquidtightness or airtightness, and workability of connection by mechanical pipe fittings. From this point of view, before the piping elements and mechanical pipe fittings are transferred from the manufacturing site to the construction site, the quality of the piping elements and mechanical pipe fittings is inspected, and the quality of the pipes meets the prescribed standards. It is desirable to transfer only the elements and mechanical pipe fittings from the manufacturing site to the construction site.

<Constitution>
Therefore, the tenth method is any one of the above-mentioned sixth to ninth methods, and is a construction method of a building piping system, which further includes the following inspection steps.

Inspection process: For multiple piping elements manufactured in the manufacturing process, the dimensional accuracy and mechanical strength of each piping element, and the connection strength and liquidtightness or airtightness of multiple piping elements connected to each other by mechanical pipe fittings. The process of inspecting one or more qualities selected from the group consisting of.

Further, in the transfer process included in the tenth method, among the plurality of piping elements and mechanical pipe fittings inspected in the above inspection process, only the piping elements and mechanical pipe fittings whose quality meets the predetermined criteria are the building piping system. Transfer to the construction site.

FIG. 7 is a flowchart showing an example of the flow of each step in the tenth method. In the flowchart illustrated in FIG. 7, the sixth step described above is added, except that step S15 in which the inspection process is executed is added between step S10 in which the manufacturing process is executed and step S20 in which the transfer process is executed. It is the same as the flowchart illustrated in FIG. 6 referred to in the description of the method. Therefore, in the following description, the tenth method will be described with a focus on the inspection step further provided in the tenth method and the transfer step executed after the inspection step.

In step S10 in the tenth method, the manufacturing step described above is executed in the same manner as in step S10 in the sixth method to the ninth method described above. Then, in the tenth method illustrated in FIG. 7, the above-mentioned inspection step is executed in the next step S15. In the inspection process, for the plurality of piping elements manufactured in the manufacturing process, the dimensional accuracy and mechanical strength of each piping element and the connection strength and liquidtightness of the plurality of piping elements connected to each other by the mechanical type pipe joint or One or more qualities selected from the airtight group are tested. In the inspection process, in addition to the inspection as a single piping element, mutual alignment, connection strength, etc. in the state of being temporarily assembled with the upstream and / or downstream piping elements that will be connected by the construction work, etc. Liquidtightness or airtightness, workability of connection by pipe joints, etc. can also be inspected.

Next, the transfer step is executed in step S20. However, in the transfer step executed in the tenth method, among the plurality of piping elements and mechanical pipe joints inspected in the inspection step executed in step S15 described above, the piping elements whose quality meets the predetermined criteria and the above-mentioned criteria. Only mechanical fittings are transferred from the manufacturing site to the construction site of the building piping system.

<effect>
As described above, according to the tenth method, in the inspection process, the dimensional accuracy and mechanical strength of each of the plurality of piping elements manufactured in the manufacturing process and the plurality of piping elements connected to each other by the mechanical type pipe joint are used. One or more qualities selected from the group consisting of connection strength and liquidtightness or airtightness are tested. Then, in the next transfer process, of the plurality of piping elements and mechanical pipe fittings inspected in the above inspection process, only the piping elements and mechanical pipe fittings whose quality meets the predetermined criteria are from the manufacturing site to the construction piping system. Transferred to the construction site.

Therefore, according to the tenth method, the work of mutual alignment of a plurality of piping elements constituting the building piping system organized at the construction site, connection strength, liquidtightness or airtightness, and connection by mechanical type pipe joints. It is possible to achieve higher quality in terms of sex and the like.

<< 11th Embodiment >>
Hereinafter, the construction method of the building piping system according to the eleventh embodiment of the present invention (hereinafter, may be referred to as “11th method”) will be described.

The press type pipe joint is inexpensive and lightweight due to its simple structure and the like, and can be integrally formed at the pipe end of the piping element constituting the system of the present invention. It is effective in reducing the mass. However, in a state where the pipe end of the piping element is inserted inside the enlarged diameter portion of the press type pipe joint, the diameter of the annular bulging portion and the portions on both sides of the annular bulging portion in the axial direction of the enlarged diameter portion are reduced ( The tool for performing caulking (hereinafter sometimes referred to as "caulking tool") is very heavy. Specifically, even a handy type caulking tool has a hydraulic mechanism, so its weight is, for example, a dozen kg. Therefore, when connecting the piping elements arranged near the ceiling of the construction site individually, the worker needs to carry out the caulking process while raising the heavy caulking tool toward the ceiling, which greatly increases the work load. It tends to cause worker fatigue.

<Constitution>
Therefore, the eleventh method is any one of the above-mentioned sixth to tenth methods, and is characterized in that the construction process includes the first to third steps listed below. The method.

First step: Some of the plurality of piping elements are connected by a press type pipe joint to form a first intermediate unit.
Second step: The upstream end of the piping element arranged on the most upstream side of the first intermediate unit and the downstream end of the piping element arranged on the most downstream side. A pipe expansion type pipe joint having a casing and an annular sealing member is attached to each of the downstream end portions to form a second intermediate unit.
Third step: The upstream end and the downstream end are connected to other piping elements by the expansion type pipe joint to form a building piping system.

At least a part of the press-type pipe joint is a press-type pipe joint integrally configured with the piping element. Specifically, at least a part of the press-type pipe joint is integrally formed with a diameter-expanded portion integrally formed over a certain range at one pipe end of the piping element and integrally with the diameter-expanded portion. It is composed of an annular bulging portion and an annular sealing member incorporated inside the annular bulging portion.

FIG. 8 is a flowchart showing an example of the flow of each step in the eleventh method. As illustrated in FIG. 8, the flow of each step from step S10 to step S20 in the eleventh method is the same as the above-mentioned tenth method, and the construction step executed in step S30 is the above-mentioned first step to the first step. It differs from the above-mentioned tenth method in that it includes three steps. Therefore, in the following description of the eleventh method, only the construction step (step S30) including the above-mentioned first step to the third step will be described in detail. Further, in the following description, FIG. 9 which is a schematic diagram showing how the building piping system is organized with the execution of the first step to the third step included in the construction step of the eleventh method is appropriately referred to. To. In FIG. 9, the specific structures of the piping elements 18, 19a and 19b are omitted for the purpose of making it easier to understand the main points of each process, and only the vicinity of the mutual connection portion is drawn. ..

When the transfer step executed in step S20 is completed and the construction step is executed in the next step S30, the first step is first executed in step S31. In the first step, as described above, some of the plurality of piping elements are connected by a press type pipe joint to form the first intermediate unit. In the example shown in FIG. 9, four piping elements 18 are connected by three press-type pipe joints 41 (formed integrally with three of the piping elements 18) to form a first intermediate unit 61. There is. In the first step, for example, four piping elements 18 can be placed on the floor to form the first intermediate unit 61. Therefore, as described above, it is not necessary to perform caulking while raising a very heavy caulking tool toward the ceiling.

Next, the second step is executed in step S32. In the second step, as described above, the expansion type pipe joint is attached to the upstream side end portion and the downstream side end portion of the first intermediate unit, respectively, to form the second intermediate unit. In the example shown in FIG. 9, the pipe element 18 arranged on the most upstream side of the first intermediate unit 61 formed in the first step is arranged on the upstream side pipe end (upstream side end portion) and the most downstream side. The expansion type pipe joints 42a and 42b are attached to the downstream pipe end (downstream side end) of the provided pipe element 18, respectively, to form the second intermediate unit 62. Also in the second step, for example, a pipe expansion type pipe joint can be connected to the upstream and downstream ends of the first intermediate unit 61 on the floor.

Next, the third step is executed in step S33. In the third step, as described above, the upstream and downstream ends of the second intermediate unit are connected to other piping elements by the expansion type pipe joint to form a building piping system. In the example shown in FIG. 9, the upstream and downstream ends of the second intermediate unit 62 formed in the second step are knitted by, for example, the eleventh method via the expansion type pipe joints 42a and 42b. It is connected to piping elements 19a and 19b that constitute a fluid flow path in a building or the like in which a building piping system is provided, respectively. In the third step, it is necessary to connect the second intermediate unit 62 to other piping elements 19a and 19b arranged on the ceiling or the like of the building. At this time, the work of fastening the fastening members (for example, a combination of bolts and nuts) constituting the expansion type pipe joints 42a and 42b is performed by an electric rotary tool such as a hand drill or an impact wrench. These electric rotary tools are relatively lightweight and easy to fasten with one hand. Therefore, since the second intermediate unit 62 can be easily and quickly connected to the other piping elements 19a and 19b, there is less risk of causing operator fatigue as compared with caulking.

<effect>
As described above, in the construction process included in the eleventh method, some piping elements are connected by a press type pipe joint in the first step to form the first intermediate unit, and in the second step, the first intermediate unit is formed. A pipe expansion type pipe joint is attached to each of the upstream and downstream ends of the pipe to form a second intermediate unit, and in the third step, the second intermediate unit is connected to another piping element via the pipe expansion type pipe joint. The building plumbing system is organized.

Therefore, in the first step, for example, the piping element can be placed on the floor to form the first intermediate unit. Therefore, as described above, it is not necessary to perform caulking while raising a very heavy caulking tool toward the ceiling. Further, in the second step as well, for example, a pipe expansion type pipe joint can be connected to the upstream and downstream ends of the first intermediate unit on the floor. On the other hand, in the third step, although it is necessary to connect the second intermediate unit to other piping elements arranged on the ceiling of the building, the fastening member constituting the expansion type pipe joint is, for example, a hand drill or an impact. It can be fastened with a relatively lightweight electric rotary tool such as a wrench. Therefore, according to the eleventh method, it is possible to reduce the burden on the worker in forming the first intermediate unit and the second intermediate unit and installing the second intermediate unit in the building, as compared with the conventional construction work. Therefore, there is a low risk of causing fatigue of the operator.

<< 12th Embodiment >>
Hereinafter, a construction method of a building piping system according to a twelfth embodiment of the present invention (hereinafter, may be referred to as a “twelfth method”) will be described.

As described above, at least one of the plurality of piping elements constituting the fourth system and the fifth system can be provided with the above-mentioned first mark and RF tag, respectively. At least one of the plurality of piping elements constituting the building piping system organized by the construction method of the building piping system according to the present invention (method of the present invention) also has such a first mark and an RF tag, respectively. Can be prepared.

In addition, some piping prior to the implementation of various inspections in the above-mentioned inspection process, transfer from the manufacturing site to the construction site, and final installation in a building or the like where a building piping system organized by the method of the present invention is provided. For the purpose of forming an intermediate unit composed of elements, the parts constituting the mechanical pipe joint may be temporarily assembled in advance. Further, the purpose is to reduce damage to the parts constituting the building piping system in the above-mentioned transfer process and / or damage to the parts constituting the system and / or the building in which the system is installed in the construction process. As a result, a curing member may be attached to the system in advance.

<Constitution>
Therefore, the twelfth method is any one of the above-mentioned sixth to eleventh methods, and is a method of constructing a building piping system, which further includes a fitting step. The fitting process is a process of performing one or more operations selected from the group consisting of the first operation to the fourth operation listed below at any time prior to the construction process and / or the construction process.

First work: Temporarily assembling the parts that make up the mechanical type pipe joint.
Second work: Mutual insertion allowance and / or mutual indexing necessary for connecting the piping element and the mechanical fitting on the outer peripheral surface of at least one piping element and / or the mechanical fitting connected to the piping element. Work to display the first mark, which is the mark corresponding to.
Third work: Attaching an RF tag capable of writing and reading electronic data corresponding to at least one selected from the group consisting of identification information of individual piping elements, construction position information, construction procedure information and construction history information, the above Work to write electronic data.
Fourth work: Work to attach curing members to the building piping system.

Since the details of the first mark and the RF tag are the same as those already described in the above-mentioned description of the fourth system and the fifth system, the description thereof is omitted here. As a specific example of the curing member, for example, an elastic material attached to the opening of a mechanically assembled pipe joint temporarily assembled for the purpose of reducing damage to parts constituting a building piping system in the above-mentioned transfer process. Examples include caps made of. By attaching such a curing member not only to the mechanical type pipe joint but also to the opening of the pipe element, it is possible to prevent foreign matter from entering the inside of the mechanical type pipe joint and the pipe element. In addition, as a specific example of a curing member attached to a building piping system for the purpose of reducing damage to parts constituting the building piping system in the construction process and / or a building provided with the building piping system. For example, a cover having a cushioning property and the like can be mentioned.

FIG. 10 is a flowchart showing an example of the flow of each step in the twelfth method. As illustrated in FIG. 10, the flow of each step from step S10 to step S30 in the twelfth method is the same as any of the above-mentioned sixth method to eleventh method. However, in the twelfth method, the sixth to eleventh methods are carried out in that the fitting step shown in step S40 is executed at any time prior to the construction step and / or the construction step executed in step S30. Is different. That is, in the twelfth method, as illustrated in FIG. 10, during the manufacturing process, between the manufacturing process and the inspection process, during the inspection process, between the inspection process and the transfer process, during the transfer process, and transfer. It is performed at any stage between processes and in the middle of the construction process (see the dashed arrow in the figure).

By performing the first work, for example, in addition to the inspection as a single piping element, the mutual position in the state of being temporarily assembled with the upstream and / or downstream piping elements that will be connected by the construction work. In addition, connection strength, liquidtightness or airtightness, workability of connection by pipe joints, etc. can also be inspected in the inspection process. In addition, by performing the above-mentioned first work prior to the transfer from the manufacturing site to the construction site and the final installation in the building where the building piping system is installed, an intermediate unit consisting of several piping elements is formed. Thus, the efficiency of the transfer work and / or the final installation work can be improved.

Further, by performing the second work, for example, in the work of connecting the piping element and the mechanical type pipe joint, the operator recognizes the first mark and in order to appropriately connect the pipe element and the mechanical type pipe joint. The required insertion allowance and / or indexing amount can be easily and surely achieved.

Further, by performing the third work, for example, the reader / writer corresponding to the RF tag reads the identification information and the construction position information of the individual piping elements, and the operator can determine the arrangement, posture, construction order, etc. of the individual piping elements. Will be recognized correctly, and it will be easy to accurately organize a piping system that accurately reflects the intended design. Furthermore, the reader / writer reads the identification information and construction procedure information of each piping element, and the operator surely grasps the appropriate connection processing force for each work at the construction site, and the mechanical type pipe joint and piping element. It is possible to facilitate the work of liquid-tightly or airtightly connecting the and. In addition, the reader / writer can read the identification information and construction history information of each piping element, and inspect or maintain the construction piping system at the completion of construction without complicating the construction work and maintenance work and increasing the labor. It is possible to improve the efficiency and accuracy of work such as.

In addition, in the transportation (transfer process) of piping elements, etc. from a manufacturing site such as a factory to a construction site, the piping elements, etc. stored in a predetermined delivery container (for example, a container, etc.) are transported according to the progress of the construction status. -It is desirable to supply, and it is desirable to store (sequentially build) the piping elements, etc. in the delivery container according to the order of construction work and / or the position of each piping element. According to this, it is possible to prevent confusion among workers at the construction site and contribute to the achievement of smooth construction work. Furthermore, a just-in-time production / supply system as standardized in the automobile industry may be adopted. RF tags are extremely useful tools in various confirmation tasks in such a highly efficient construction process.

The utilization of RF tags in the process of forming a building piping system by connecting piping elements and the like transferred from the manufacturing site (factory) as described above at the construction site will be described in detail below.

First, after each piping element is manufactured in a factory or the like as a manufacturing site, an RF tag is attached before shipment, and electronic data corresponding to various information is stored (written) in the RF tag by a reader / writer. Specific examples of the above information include the following (a) to (c).

(A) Individual identification information such as the identification number, dimensions and name of the piping element.
(B) Information such as the position (address) and installation posture of the piping element at the time of construction at the construction site, as well as the construction order and layout order.
(C) Information on the construction procedure such as the magnitude and speed of the force (connection processing force) to be applied to the piping element when caulking.

When the piping element carried from the manufacturing site to the construction site by the transfer process is carried out from the delivery container, the piping is read by reading the information stored in the RF tag, for example, by a handy type reader / writer or scanner. Workers and / or supervisors can easily recognize information such as element characteristics, layout at the time of construction, construction order, and construction procedure, and these information can be shared electronically. The reading and / or rewriting of the RF tag by a reader / writer, a scanner, or the like can be performed individually for each RF tag, or can be performed collectively for a plurality of RF tags existing within a predetermined range. It is possible.

Then, a plurality of piping elements arranged in place (for example, suspension support, etc.) are connected to each other by, for example, a caulking tool, an electric rotary tool, or the like. At this time, the worker and / or the supervisor arranges (hangs) in a predetermined position and posture according to a predetermined construction order based on the information stored in the RF tag, and the predetermined machining tool. Allows individual plumbing elements to be connected to form a building plumbing system.

At this time, if a reader / writer is also mounted on these tools and they are electrically connected and linked with the control system of the tools, the RF of each piping element can be used to check the construction (caulking) status and the progress status of the construction process. You can write to the tag in real time. That is, in addition to the above-mentioned (a) to (c), as further information, (d) the implementation status (for example, caulking processing, etc.) of the connection work (for example, caulking processing, etc.), the progress of the construction process, etc. Construction history information can be added to the RF tag. Therefore, the construction history can be easily and collectively referred to at the time of inspection at the completion of construction of the building piping system or maintenance after a certain period of time has passed from the construction. From such a viewpoint, it is preferable that the RF tag is attached in the vicinity of the mechanical type pipe joint and at a position where there is no hindrance in the construction work.

As the electronic data corresponding to the implementation status of the connection work included in the above-mentioned information (d) stored in the RF tag, for example, electronic data showing the transition of the current value of the machining tool can be mentioned. Further, as the electronic data corresponding to the progress of the construction process, for example, electronic data indicating the arrival position of the caulking tool in the building piping system can be mentioned.

Further, by storing the three-dimensional position information in the RF tag, it is possible to grasp the information regarding the three-dimensional position coordinates and the posture of each piping element (RF tag attached to). Therefore, by reading the electronic data corresponding to the information with a handy scanner or the like and calculating it with a host computer or the like, the fluid path (alignment of the flow path) of the entire building piping system and the accurate position of each piping element are obtained. In addition, it is possible to accurately grasp the deviation from the intended position. As a result, it is possible to create a piping construction (result) diagram based on these electronic data. If necessary, traceability can be ensured by linking this information with, for example, BIM (Building Information Modeling) or incorporating it into a blockchain.

In addition, by performing the fourth work, for example, damage to parts and the like constituting the building piping system in the transfer process and / or parts constituting the building piping system in the construction process and / or building piping system are provided. It is possible to reduce damage to buildings and the like.

<effect>
As described above, according to the construction method (method of the present invention) of the building piping system according to the present invention, the enlarged diameter portion and the annular bulging portion are efficiently and highly accurately formed at the pipe end of the piping element at the manufacturing site. It can be formed, and the construction work at the construction site can be significantly reduced. In the construction method (12th method) of the building piping system according to the twelfth embodiment of the present invention, the fitting is a step of performing one or more works selected from the group consisting of the above-mentioned first work to the fourth work. The process is performed at any time prior to the construction process and / or the construction process. As a result, various effects as described in detail above are achieved for each of the first to fourth works, the efficiency and accuracy of the construction work at the construction site are greatly improved, and the building piping at the completion of the construction is completed. It is possible to improve the efficiency and accuracy of work such as maintenance after system inspection or construction completion.

As described above, for the purpose of explaining the present invention, some embodiments having a specific configuration and preferable embodiments of the embodiments have been described with reference to the accompanying drawings at times, but the scope of the present invention is as follows. It should not be construed to be limited to the exemplary embodiments and preferred embodiments of the invention, but it is said that modifications can be made as appropriate within the scope of the claims and the matters described in the specification. Not even.

1 ... Piping system, 2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19a,19b ... Piping element, 16b ... Outlet, 16e ... Enlarged diameter, 16i, 17i, 17o ... Line (first mark), 21 ... First pipe, 22 ... Second pipe, 23 ... Welded part, 24 ... Upstream side of piping element 13. End, 30 ... RF tag, 41 ... Press type pipe joint, 41c ... Diagonal part (caulked part), 42a, 42b ... Expansion type pipe joint, 51 ... 1st mark, 61 ... 1st intermediate unit, 62 ... 2nd intermediate unit, 101A ... Housing type pipe joint, 110 ... Seal member, 120 ... 1st casing, 131S ... 2nd segment, 131P ... Outer peripheral part, 131R ... Rim part, 131F ... Flange part, 210D ... Circular bulging part , 211 ... Piping elements, a, b, c, d, e, f, g, h, i, j, k, l, m, n ... Connections, a ... The most upstream end of the piping system 1, b, c , D, E, F, To, Chi, Li ... Downstream ends of piping elements 3, 8, 9, 11, 12, 13, 15.

Claims (6)

A building piping system consisting of multiple piping elements connected to each other by mechanical fittings.
A diameter-expanded portion is integrally formed over a certain range at at least one pipe end of the piping element, and the diameter-expanded portion has a portion that bulges outward in the radial direction over the entire circumference. A part of the mechanical pipe joint or a part of the connection structure between the mechanical pipe joint and the pipe element is formed by the pipe end by integrally forming the annular bulging portion.
At least one of the mechanical type pipe joints is a press-type pipe joint composed of the enlarged diameter portion, the annular bulging portion, and an annular sealing member incorporated inside the annular bulging portion. There,
An end portion having a straight tubular shape of an adjacent piping element is fitted and caulked to the enlarged diameter portion of the press type pipe joint.
At least some of the piping elements are equipped with RF tags capable of writing and reading electronic data.
The electronic data includes data corresponding to identification information of individual piping elements and construction position information including arrangement and construction order of individual piping elements.
A plumbing system for construction that is characterized by that. The building piping system according to claim 1.
Corresponds to the mutual insertion allowance and / or mutual indexing necessary for connecting the pipe element and the mechanical pipe joint on the outer peripheral surface of at least one pipe element and the mechanical pipe joint connected to the pipe element. The first mark, which is a mark to be used, is displayed.
The first mark is composed of the sticker-shaped RF tag.
A plumbing system for construction that is characterized by that. The building piping system according to claim 1 or 2.
The electronic data includes data corresponding to the construction history information of each of the piping elements.
The magnitude of the connection processing force applied to the piping element when the processing tool and / or the piping element used for connecting the mechanical type pipe joint and the piping element is connected to the mechanical type pipe joint and the piping element. It is equipped with a sensor configured to output the corresponding detection signal.
The RF tag is configured to automatically record electronic data corresponding to the detection signal output from the sensor as the data corresponding to the construction history information.
A plumbing system for construction that is characterized by that. The construction method of the building piping system according to claim 1.
An annular bulge that bulges outward in the radial direction over the entire circumference at a position separated by a predetermined distance from at least one pipe end of the pipe element constituting the building piping system at a manufacturing site. A manufacturing process that involves forming the protrusions integrally,
A transfer process for transferring the piping element and the mechanical pipe joint from the manufacturing site to the construction site of the building piping system.
In the manufacturing process and / or the transfer process, it is possible to write and read electronic data including data corresponding to identification information of individual piping elements and construction position information including arrangement and construction order of individual piping elements. A mounting step comprising attaching the RF tag to at least a portion of the plurality of piping elements and writing the electronic data to the RF tag.
Individuals of the plurality of pipe elements transferred in the transfer step are derived at the construction site based on the identification information and the construction position information of the individual pipe elements read by the reader / writer corresponding to the RF tag. After forming a piping system that reflects the intended design according to the arrangement and construction order of the piping elements, the construction process of connecting the piping systems to each other by the mechanical pipe joint to form the building piping system, and
Including
In the connection structure between the mechanical pipe joint and the pipe element configured in the construction process, the pipe end on which the annular bulge of the pipe element is formed constitutes a part of the mechanical pipe joint. are doing,
A method of constructing a building piping system, which is characterized by this. The construction method of the building piping system according to claim 4.
The fitting process is performed on the outer peripheral surface of at least one of the piping elements and the mechanical fitting connected to the piping element, and the mutual insertion allowance and / or the mutual insertion allowance required for connecting the piping element and the mechanical fitting to the mechanical fitting. Including displaying the first mark, which is a mark corresponding to mutual indexing,
The first mark is composed of the sticker-shaped RF tag.
A method of constructing a building piping system, which is characterized by this. The construction method of the building piping system according to claim 4 or 5.
The electronic data includes data corresponding to the construction history information of each of the piping elements.
The magnitude of the connection processing force applied to the piping element when the processing tool and / or the piping element used for connecting the mechanical type pipe joint and the piping element is connected to the mechanical type pipe joint and the piping element. It is equipped with a sensor configured to output the corresponding detection signal.
The RF tag is configured to automatically record electronic data corresponding to the detection signal output from the sensor as the data corresponding to the construction history information in the construction process.
A method of constructing a building piping system, which is characterized by this.

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