JPS62151684A - Method of installing piping - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a piping installation method that allows piping installation work in industrial plants such as nuclear power plants to be easily carried out at a construction site.

(Problems with the technical front of the invention) Conventionally, nuclear power generation plan 1-
In the construction of J3, pipe hemming work accounts for a large portion of both construction time and cost, accounting for nearly 70% of the on-site assembly process.

For this reason, it was inspected from an early stage as a means of shortening the construction period.

In addition, piping installation work requires a large amount of work and a large number of parts, so a lot of effort is required for on-site management, which is a major bottleneck in shortening the construction period.

Here, a conventional on-site piping construction procedure will be explained with reference to FIG.

In the construction procedure, first, the piping/valve support 1 is installed based on the piping construction drawing and Navoto detailed drawing, and then the valve 2,
Process piping 3 is installed.

Next, the installation of a 1-lay bow h 5 for supporting the air operated valve (AO valve) 4 and the instrumentation air piping 6 is carried out, and after installation, the post-driving anchor 7 for the control cable and the conduit are installed. The boat 8 and conduit 9 are installed. Furthermore, instrumentation impulse pipes and sampling pipes will be constructed and connected to drive equipment such as pumps, control equipment, and meters.

In this series of piping installation work, process piping 3. The air piping 6 for the JF equipment, the Ouvre for the control 11, the instrumentation impulse pipe, and the sampling piping are each constructed by different workers (two workers are required.
The current situation is that the installation and removal of scaffolding is being carried out at J, and as a result, the construction period is extremely long, and there is a lot of tedious work such as setting up scaffolding.

On the other hand, after piping construction, unit tests for valves and Class 512, non-destructive inspections of welded parts, and government inspections are conducted.

However, carrying out such tests and inspections on-site requires an inconvenient work environment, and subsequent quality control requires additional man-hours and is troublesome.

Furthermore, when installing the air-operated valves 4, a large amount of space is required because a large number of them are installed, and each one is provided with an accessory. That is, as shown in FIG. 6, a filter 11, a regulator (pressure reducer) 12, and an A-filter 13 are attached to each air-operated valve 4, respectively. Terminal box 14 for control cable, limit switch 15
, a solenoid valve 16 is also installed. Considering the maintenance space for this air-operated valve 4, in the case of a 250A type air-operated valve 4, an oven space 17 with a margin of about 500a+X500s+ is required. Since this oven space 17 is necessary for maintenance, it cannot be reduced, and this is one of the reasons why the building cannot be made smaller.

(Purpose of the Invention) The present invention has been made in consideration of one particular situation, and is a system for unitizing n devices, n appliances, piping, and valves required for on-site piping installation work on a frame. To provide a piping installation method that can standardize on-site piping work, shorten the construction period, stabilize quality, and simplify various on-site tests and inspections by incorporating it, sending it to the site by UQ personnel, and connecting it to external equipment. With the goal.

[General outline of the invention] In order to achieve the above-mentioned object, the present invention provides industrial plans 1 to 1.
This piping installation method is characterized by assembling the required piping, valves, instruments, and equipment together with the mount as a piping unit in advance at a factory, and connecting this piping unit to external equipment at the plant construction site. do.

(Embodiment of the Invention) Hereinafter, an embodiment of the piping installation method according to the present invention will be described with reference to FIGS. 1 to 4.

1 and 2, an example is shown in which a piping unit 20 is constructed using the method of the present invention, particularly a floor installation type piping unit 20.

This piping unit 20 is obtained by assembling various types of instruments, instruments, piping therefor, and valves required in a nuclear power plant together with a transportable pedestal 21 in advance at a factory. In addition, the pedestal 21 includes drive devices such as a pump 22, control devices such as a limit switch 23, meters such as a PQFA transmission line 24, piping 25 such as professional wrestling piping and utility piping from various devices, and furthermore, A large number of air-operated valves 26, manual valves 27, and others in the piping 25 are assembled and arranged based on the predetermined glue port detailed drawings and piping construction drawings.

In addition, air-operated valve 26, instrumentation air (I△
), an 81-channel air pipe 28, a pi-1 pressure impulse pipe 29, and a sampling line 30 are also installed in the piping unit 20. Their connections are installed at the end of the piping unit 1-20 itself (). It is located in a solenoid valve rack 31 that is mounted on a wall, and is connectable to an external instrumentation rack 32.

In addition, various equipment listed in I'lff, Jl equipment, electric cable 33 for powering the valve, control cable 34 for control,
The conduits that house and distribute these cables 33 and 34 are also wired to the piping unit 20 via trays that support them. Their connections are connected to piping unit 2
0 centralized power terminal box 35 provided at the other end;
These terminals t83536 are located in the control terminal box 36, and connections with an external power source and an external control panel can be made only through these terminals t83536. In this way, cable 33.34
By connecting the terminal boxes 35 and 36 to the outside, on-site work is further simplified, and on-site work on wiring inside the piping unit 20 is no longer necessary.

The pedestal 21 includes piping 25 to the equipment, instrumentation piping 28, 29 to the instruments, a report of the sampling line 30, a tray support supporting cables 33, 34, an air-operated valve 26, a manual valve 27, a pump 22, etc. The maintenance stand for the equipment is shared. By sharing, the overall structure can be simplified, space can be used more effectively, piping components can be reduced, and the weight can be reduced, contributing to ease of transport to the site.

On the other hand, the air-operated valve 26 is equipped with necessary accessories such as a solenoid valve, a filter, a regulator, an oiler, and a control cable terminal box in the solenoid valve rack 31 and the control l terminal box 3.
Concentrate on 6. Ej, that is, the accessories required for each of the many air-operated valves 26 provided in the piping unit 20 are centralized for each piping unit 20.

As a result, each air-operated valve 26 provided in the piping unit 20 is not equipped with any accessories, as shown in FIG. connected remotely. By doing this, the separate maintenance space ff1u fQ that was conventionally required for each air-operated valve 26 is no longer necessary, the space can be used effectively, the number of accessory parts can be reduced, and the overall Greatly useful for downsizing and space saving.

The piping unit 20 configured as described above is carried to the site and installed. By using a tower crane or a large crane for transport, it is possible to streamline construction work and reduce the need for piping materials and walls to be constructed after transporting large parts.

Furthermore, when the piping units 1 to 20 are brought in, the connecting piping with the piping units 1 to 20 and the nabo 1 to 1 are spooled and brought in at the same time, thereby making it possible to further shorten the construction period.

At the site where the distributed t2 units 1-20 are delivered, connections with external equipment are made. As shown in Figure 2,
Each I device 37 is connected to the piping 25, the dynamic cable 39 from the MCC 38 is connected to the electronic terminal box 35, and the control cable 41 from the control board 40 is connected to the control terminal box 36.

In addition, the air for supplying the air-operated valve 26 and various mouthpieces is connected to the solenoid valve rack 31 through the instrumentation air main pipe 43 from the instrumentation impulse pipe IPI42, and the instrumentation rack 32 and the attached differential The instrumentation pressure conduit 29 from the pressure transmission line 44 is joined at the end of the piping unit 20 .

When connected to external devices in this way, each device 37 is connected to devices such as the pump 22 via piping 25. M(,
038 via the power terminal box 35 and the power cable 33, from the control panel 40 via the υ control terminal box 36 and the control cable 34, and from the instrumentation air storage tank 42 via the solenoid valve rack 31. 51, such as an air-operated valve 26, a flow rate transmitter 24, and equipment such as a pump 22, respectively.

Further, the ffl loading raw rack 32 is connected to the piping 25 and the loop 1 unit via the 81 loading river pressure pipe 29.

FIG. 4 also shows a piping unit (~) in another embodiment.
20. η straw wall) that of the trigram is shown. In this embodiment as well, the #3 instrument, the meters, the piping for these, and the valves are assembled together with the pedestal 21, and the connection parts to the outside (larger instruments) are concentrated on the terminal box 35° 36.1 and the magnetic rack 31. In other words, the installation of these terminal boxes 35, 36 and the electric laver valve rack 31 in the piping units 1 to 20 parts is the same as in the previous embodiment.
'3, the previous embodiment shown in FIGS. 1 to 3 and In
Those with a 1- value are given the same reference numerals. Also, 4 in the figure
5 is a frame suspension beam, and 46 is an air terminal box.

(Effects of the Invention) The present invention is carried out as described above, and various devices, meters, their piping, and valves are preassembled together with a stand as a piping unit, and this is transported to the site and removed from the site; Since the connection is made with the pipes, on-site piping installation work can be significantly reduced and the installation period can be shortened.

In addition, the equipment and instruments in the piping unit can be assembled and tested in the factory, and welded parts of piping etc. can be tested.
Since inspections can be carried out within the factory within 6 hours, on-site work under adverse conditions is reduced and quality control becomes easier.

As explained above, according to the present invention, construction work is significantly shortened, on-site work is simplified, and quality control is facilitated by factory production (!1).In addition, piping reports can be shared, space is The effective use of water will result in significant benefits such as the reduction of piping components.

[Brief explanation of drawings]

FIG. 1 illustrates an embodiment of the method of the present invention,
Fig. 2 is a perspective view of the piping unit 1 shown in Fig. 1 at the plant construction site and does not show connections with external equipment, and Fig. 3 is a perspective view of the piping unit 1 shown in Fig. 1. FIG. 4 is a perspective view of a unitized air-operated valve according to one embodiment, and FIG. and the sixth
The figures show a conventional example, FIG. 5 is a perspective view after piping construction, and FIG. 6 is a perspective view of an air-operated valve. 1...Piping/operating valve, 2...Valve, 3...
Process piping, 4...Air operated valve, 5...Tray river 1 boat, 6...Instrumentation air piping, 7...Post-throttle anchor, 8...Ribbo for conduit 1~, 9...
Electrical conduit, 10... S1 Sokawa air, 11... Filter, 12... Regulator, 13... Oiler, 14
...Terminal box, 15...Limit 1 to switch, 16.
...Solenoid valve, 17...A-Pun space, 20...
Piping unit l-121... Frame, 22... Pump,
23... Limit 1 to switch, 24... Flow rate transmission path, 25... Piping, 26... Air operated valve, 27...
Manual valve, 28... Instrumentation air piping, 29... Instrumentation impulse pipe, 30... Sampling line, 31... Solenoid valve rack, 32... Instrumentation rack, 33... Lightning cable , 34... Control cable, 35... Power terminal box, 36... System 611 terminal box, 37... Each change equipment, 3
8...MCC, 39...Moving capacity, 40...
Control 11 board, 41... Control signal group, /12...
・Instrumentation air storage (convex, 43...b1 air main pipe, ・
44... Differential pressure transmission line, 45... Frame suspension beam, /
16...Air terminal box. Applicant's agent Hisatoshi Hatano I Figure

Claims (1)

[Claims] 1. In a piping installation method for an industrial plant, necessary piping, valves, instruments, and equipment are assembled together with a mount as a piping unit in advance at a factory, and this piping unit is installed externally at a plant construction site. A piping installation method characterized by connecting to equipment. 2. The piping installation method according to claim 1, wherein the piping unit includes an instrumentation piping, a pressure impulse pipe to a meter, a sampling piping, an electric conduit, and a cable. 3. The piping installation method as claimed in claim 1 or 2, wherein at the end of the piping unit, connection points for piping and cables connected to external equipment are centralized using racks and terminal boxes. 4. The mount of the piping unit is commonly used for process piping to equipment, instrumentation piping to instruments, support for sampling piping, support for cable trays, and equipment maintenance mount. Piping installation method described in any of paragraph 3. 5. The piping installation method according to any one of claims 1 to 4, wherein when the piping unit is brought in, the connecting piping and the support to the piping unit are spooled and brought in at the same time.