CN115306956A - Pipeline installation process of nuclear power station - Google Patents

Abstract

The invention relates to a pipeline installation process of a nuclear power station, which comprises the following steps: s1, presetting a pipeline running mode of a pipeline according to the pipeline inlet and outlet position of an installation space; s2, acquiring position data of a positioning structure for positioning the pipeline in the installation space; s3, manufacturing each pipe section of the pipeline according to a pipe running mode; s4, pre-positioning each pipe section, and welding each pipe section to obtain a prefabricated pipe; and S5, installing the prefabricated pipeline to a positioning structure of the installation space. The prefabricated pipeline can be prefabricated outside a field room or in a prefabricated workshop, then is integrally transported to the field room to be installed and welded, is manufactured in advance, is not influenced by the manufacturing progress of an installation space, avoids the construction period from being influenced mutually, improves the efficiency and saves the cost.

Description

Pipeline Installation Process of Nuclear Power Plant

technical field

The invention relates to the field of nuclear power, in particular to a pipeline installation process for a nuclear power plant.

Background technique

Due to the complexity of the nuclear power plant system, there are a large number of pipeline and support constructions during the construction of nuclear power plants, accounting for more than half of the entire nuclear power plant construction volume. Moreover, the rooms of the nuclear island plant are compactly arranged, and the construction space is small.

According to the conventional construction logic, generally after the room is handed over, the first-stage support is welded to the pre-embedded board of the room, then the pipeline is introduced for welding construction, and finally the pipeline is fixed to the support.

This kind of construction logic requires a lot of groove grinding and welding work in the room. On the one hand, it is restricted by the handover of the room, on the other hand, the work efficiency is relatively low, and the construction environment is not friendly.

The general logic for the construction of pipe supports in nuclear power plants is: room handover → introduction of support materials → first-stage support installation and welding → introduction of pipe components → pipe assembly, welding and grinding → second-stage support installation → final adjustment and fixing of pipes.

Taking the installation of pipes and brackets in a room as an example, it includes the installation of 7 pipe sections and 3 brackets. There are 6 welds in the pipeline and 3 welds in each bracket. The specific construction steps are as follows:

1. After the room is handed over, weld the three bracket square steels to the pre-embedded panels on the wall to complete the bracket weld 1;

2. Carry out the welding of bracket 1, bracket 2 guard plate and pipe holder, and complete bracket welding seam 3;

3. Lead the straight pipe section and the elbow pipe section into the room, and complete the pipe weld 1 and weld 2 in sequence;

4. According to the distance between the pipe and the wall, calculate and cut the square steel of support 1 and support 2;

5. Weld the guard plates of bracket 1 and bracket 2 to the bracket square steel to complete the bracket weld 2;

6. Install the pipe clamps of bracket 1 and bracket 2, and fix pipe section 1 and pipe section 2;

7. Continue to complete the pipe weld 3 and weld 4 in sequence;

8. According to the distance between the pipe and the wall, calculate and cut the square steel of support 3;

9. Weld the guard plate of the bracket 3, and install the pipe clamp of the bracket 3 to fix the pipe;

10. Continue to complete the pipe weld 5 and pipe weld 6;

11. Weld the stoppers of the three brackets on the pipe to complete the final fixing of the pipe.

Under the current construction logic, the entire construction process is basically serial. Pipe welding and bracket welding are carried out crosswise, and it also involves multiple measurements, adjustments, cutting and grinding, all done in the on-site room. The entire construction period is relatively long, subject to the constraints of room handover.

Moreover, there are many cutting, grinding and welding operations in the narrow space of the room, and the construction environment is harsh. Most of the pipe supports are still in high places or in narrow spaces, which is not conducive to the implementation of on-site installation and welding work.

Contents of the invention

The technical problem to be solved by the present invention is to provide a pipeline installation process for a nuclear power plant in view of the above-mentioned defects of the prior art.

The technical solution adopted by the present invention to solve the technical problem is: to construct a pipeline installation process for a nuclear power plant, comprising the following steps:

S1. Preset the pipe routing method according to the pipe entry and exit positions of the installation space;

S2. Obtain the position data of the positioning structure for positioning the pipeline in the installation space;

S3. According to the pipe routing method, make each pipe section of the pipeline;

S4. Pre-positioning each pipe section, welding each pipe section to obtain a prefabricated pipe;

S5. Install the prefabricated pipeline to the positioning structure of the installation space.

In some embodiments, in the step S3, the length of each pipe section is set according to the pipe routing method, and each pipe section is cut and manufactured.

In some embodiments, in the step S4, when pre-positioning each pipe section, the position of each pipe section is monitored.

In some embodiments, the position monitoring of the pipe section is performed using a three-dimensional measurement tool.

In some embodiments, when the position of the pipeline deviates, the position of each pipe segment is adjusted.

In some embodiments, the positioning structure includes a hole provided in the installation space for at least one end of the pipe to pass through, and the step S5 includes passing the end of the pipe through the hole.

In some embodiments, the pipeline includes a first straight section, a first elbow section, and a second straight section connected in sequence, the first elbow section is arc-shaped, and the first straight section and the third straight section The segment forms an included angle with the second straight segment.

In some embodiments, the step S1 further includes presetting the specifications of the support structure supporting the pipeline according to the installation space;

The step S2 also includes acquiring position data of the positioning structure for positioning the support structure;

The step S3 also includes making the support structure;

The step S4 also includes installing the support structure on the pipeline to obtain a prefabricated pipeline;

The step S5 also includes installing the support structure to the positioning structure of the installation space.

In some embodiments, the positioning structure includes an embedded part arranged in the installation space, and the step S5 includes installing the support structure to the embedded part.

In some embodiments, the support structure includes a support base and a clamp, and the step S4 further includes clamping the support base and the clamp on the pipeline, and locking the support base and the clamp;

The step S5 also includes welding the support seat to the embedded part.

In some embodiments, the support seat includes a card seat, a guard plate, and a bracket, and the step S3 further includes welding the card seat and the bracket to both sides of the guard plate, so that the card seat and the the clamp clamps the pipe;

The step S5 also includes welding the bracket to the embedded part.

In some embodiments, lock holes are respectively provided on the card seat and the clamp, and the step S3 further includes: the locking member penetrates through the lock holes on the card seat and the clamp, and inserts the card seat and the clamp The hoop locks, gripping the pipe.

In some embodiments, robots are used to automate welding and assembly.

In some embodiments, the prefabricated pipeline is manufactured in a prefabricated workshop.

Implementation of the pipeline installation process for nuclear power plants of the present invention has the following beneficial effects: the prefabricated pipeline can be prefabricated outside the on-site room or in the prefabrication workshop, and then the whole is transported to the on-site room for installation and welding. It is made in advance and is not affected by the progress of the installation space , to avoid mutual influence on the construction period, improve efficiency and save costs.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing and embodiment, in the accompanying drawing:

Fig. 1 is the structural representation after adopting the pipeline installation process of nuclear power plant installation pipeline in the embodiment of the present invention;

Fig. 2 is a structural schematic diagram of the supporting structure in Fig. 1 after being assembled with pipes and embedded parts.

Detailed ways

In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.

As shown in Figure 1, the pipeline installation process of the nuclear power plant in a preferred embodiment of the present invention intends to adopt the construction method of offline assembly of the pipeline 1 and its supporting structure 2, and complete the installation of the pipeline 1 and the supporting structure 2 outside the on-site room or in the prefabricated workshop Prefabricated and assembled, and then transported as a whole to the on-site room for installation and welding.

The pipeline installation process of nuclear power plants is based on the establishment of "miniature, fast and flexible" offline composite components, with the pipeline 1 and support structure 2 construction procedures and process optimization as the foothold, integrating BIM simulation, automatic welding, and three-dimensional measurement With the use of advanced technologies such as the Internet of Things, the construction of the pipeline 1 and the support structure 2 has been "decoupled" to the greatest extent from upstream supply and room handover.

This technology gets rid of many factors such as general "modularization" and "factoryization" technology application to design qualifications, manufacturing qualifications, and workplaces. The scale effect and value contribution after wide application are more obvious.

The large-scale use of this technology will effectively promote the control of project safety, quality, schedule and cost.

Specifically, in this embodiment, the pipeline installation process of the nuclear power plant includes the following steps:

S1. Preset the route of the pipeline 1 according to the entrance and exit position of the pipeline 1 in the installation space 3;

S2. Obtain the position data of the positioning structure 4 for positioning the pipeline 1 in the installation space 3;

S3. According to the pipe routing method, make each pipe section of the pipeline 1;

S4. Pre-positioning each pipe section, welding each pipe section to obtain a prefabricated pipeline 10;

S5 , installing the prefabricated pipeline 10 to the positioning structure 4 of the installation space 3 .

It can be understood that the installation space 3 in this application is usually the room, the cavity, etc. where the pipeline 1 needs to be installed in the nuclear power plant, and can be used for the installation of the prefabricated pipeline 10 in the nuclear power plant project. 3. The impact of production progress, avoid mutual influence on construction period, improve efficiency and save cost.

Preferably, since the length of the pipeline 1 may be longer, in order to provide better support for the pipeline 1, the prefabricated pipeline 10 also needs to be provided with a support structure 2 connected to the installation space 3, so as to avoid deformation of the pipeline 1 and improve stability.

Specifically, the pipeline installation process of the nuclear power plant also includes the following steps:

Step S1 also includes presetting the specifications of the support structure 2 supporting the pipeline 1 according to the installation space 3;

Step S2 also includes obtaining the position data of the positioning structure 4 positioning the support structure 2;

Step S3 also includes making the supporting structure 2;

Step S4 also includes installing the support structure 2 on the pipeline 1 to obtain a prefabricated pipeline 10;

Step S5 also includes installing the support structure 2 to the positioning structure 4 of the installation space 3 .

In this embodiment, both the pipeline 1 and the support structure 2 are installed and positioned, which facilitates the positioning and overall installation of the pipeline 1 . Certainly, when the length of the pipeline 1 is not long, the supporting structure 2 can also be canceled.

In order not to interfere with the construction period and production, the prefabricated pipeline 10 is completed in the prefabricated workshop, and then transported to the installation space 3 such as a room for installation.

Further, the pipeline 1 is usually formed by welding a plurality of pipe sections. It can be understood that in step S3, according to the pipe routing method, the length of each pipe section is set, and each pipe section is cut and manufactured. installation size requirements. Of course, each pipe section can also be processed according to the designed standard size, and then further processed according to the actual installation size.

Correspondingly, when making the pipe section, the bevel at the end of the pipe section is processed to facilitate welding after splicing the ends of adjacent pipe sections.

Specifically, in this embodiment, the pipeline 1 includes a first straight section 11, a first bent section 12, a second straight section 13, a second bent section 14, a third straight section 15, a third The bent pipe section 16, the fourth straight section 17, the first bent pipe section 12, the second bent pipe section 14, and the third bent pipe section 16 are all arc-shaped, and are 90° elbows. In other embodiments Among them, it can also be an elbow with an angle of 60°, 120°, etc., and the first elbow section 12, the second elbow section 14, and the third elbow section 16 of appropriate curvature can be selected according to the direction of the pipeline 1.

The first straight section 11, the third straight section 15 form an angle with the second straight section 13 respectively, further, the first straight section 11, the third straight section 15 form an angle, the third The straight extension section 15 and the fourth straight extension section 17 form an angle, preferably, they form a right angle with each other. The included angles of the pipe sections of the pipe 1 can adjust the direction of the two ends of the pipe 1 to meet the requirement of the direction of entry and exit of the two ends of the pipe 1 .

Of course, the bending state of the pipeline 1 can also be produced with a suitable number of straight stretching sections and bent pipe sections according to the actual requirements of the installation space 3 .

Further, in step S4, when each pipe section is pre-positioned, the position of each pipe section is monitored to prevent deviation during welding, which affects the size after welding, and avoids position deviation during assembly, which affects the follow-up Assembly of the room.

Preferably, due to the relatively long length of the pipeline 1, in order to monitor each position of the pipeline 1 synchronously, a three-dimensional measurement tool can be used to monitor the position of the pipe section, so as to achieve stable positioning and accurate monitoring, and less likely to cause positioning deviation.

In addition, when the position of the pipeline 1 is displaced, the position of each pipe section is adjusted. Preferably, a support can be used to position the pipe section, and a clamp matching the pipeline 1 and the support structure 2 is set on the support to clamp , accurate positioning, not easy to shift.

Further, the monitored data of the position of each pipe section can be associated with the position of the support, and when the position of the pipe section is misaligned, the position of the support can be adjusted so that the pipe section can be adjusted to the correct position.

In some embodiments, the positioning structure 4 includes a hole 41 provided in the installation space 3 for the end of the pipeline 1 to pass through. Further, the step S5 includes passing the end of the pipeline 1 through Passing through the hole 41 , the pipe 1 can be installed at one end to the hole 41 to pass through, or only one end can be installed to the hole 41 to pass through.

When the prefabricated pipeline 10 needs a supporting structure 2 , the positioning structure 4 includes an embedded part 42 provided in the installation space 3 , and the step S5 includes installing the supporting structure 2 to the embedded part 42 .

Further, as shown in FIG. 2 , in this embodiment, the support structure 2 includes a support base 21 and a clamp 22, and the step S4 also includes clamping the support base 21 and the clamp 22 on the pipe 1. Lock the support seat 21 and the clamp 22 so that the support seat 21 and the clamp 22 clamp and fix the pipe 1 from both sides.

In addition, when installing the prefabricated pipeline 10 into the installation space 3 , step S5 also includes welding the support base 21 to the embedded part 42 .

Further, in this embodiment, the support seat 21 includes a card seat 211, a guard plate 212, and a bracket 213, and the step S3 further includes welding the card seat 211 and the bracket 213 to the two sides of the guard plate 212 respectively. side, let the clamp 211 and the clamp 22 clamp the pipe 1;

Step S5 also includes welding the bracket 213 to the embedded part 42 .

The card seat 211 and the clamp 22 are respectively provided with lock holes, and the step S3 also includes: the locking member 23 penetrates through the lock holes on the card seat 211 and the clamp 22, and the clamp 211 and the clamp 22 lock and clamp the pipe 1 .

The welding of the pipeline 1 and the assembly of the support structure 2 can be automatically welded and assembled by a robot, which improves the quality, saves manpower, and improves welding efficiency and quality.

The prefabricated pipeline 10 is manufactured in the prefabricated workshop, and then transported to the installation space 3. The fabrication is not restricted by the narrow installation space 3, which makes the fabrication easier.

It can be understood that the pipeline installation process of the nuclear power plant adopted in the present invention mainly includes the following points:

1. In the construction preparation stage, according to the size of the room and the access channel, analyze and reasonably divide the module size of the pipeline 1 and the support structure 2, and form a workshop prefabrication technical plan;

2. Intervene in the civil construction in advance, conduct three-dimensional measurement of the relevant embedded parts 42 and holes 41 in the room, and form the input parameters for the prefabrication of the pipeline 1 and support structure 2;

3. Combining the measured data of the room and the theoretical design data, calculate the cutting size of the pipeline 1 and the support structure 2;

4. Complete the assembly and welding of the support structure 2 and the assembly and welding of the pipeline 1 in the prefabrication workshop, and introduce automatic welding technology and assembly line operations to improve the prefabrication efficiency of the workshop;

5. Assemble the welded supporting structure 2 and the pipe 1 into an integral module, and use the three-dimensional measurement technology to complete the calculation and cutting of the final groove of the pipe 1 in the workshop;

6. After the room is handed over, the assembly of pipeline 1 and support structure 2 is introduced into the room, that is, the combination of pipeline 1 and support structure 2 is completed outside the workshop or factory building and introduced as a whole;

7. Complete the welding of the final pipeline 1 weld and the support structure 2 and the embedded plate;

Specifically, the technical effects brought about by the technical solution of the present invention mainly include the following points:

1. Removed the restriction of room handover, which is conducive to the progress of the site;

2. Offline operation expands the construction area and facilitates progress;

3. Part of the welding site works at high altitude or in a narrow space, which becomes workshop welding, and the working environment is better, which is conducive to progress and quality;

4. The welding position of part of the welding port is changed from full position welding to horizontal position welding, which reduces the difficulty of welding, and is easy to use with automatic welding equipment, which is conducive to progress and quality;

5. The radiographic testing of welding joints is more convenient. In the past, it was necessary to establish a control area on site, which affected the progress of the entire project, but now it can be pulled into the testing room for testing at any time;

6. It can relieve the pressure of room handover in the early stage of the project, and can also greatly reduce the cross construction in the room during the peak period of the project, reducing the construction safety risk and reducing the coordination of construction interfaces;

7. Due to the better welding conditions in the workshop, the demand for high-tech welder resources can be reduced and the cost of human resources can be saved.

The technical key points of the present invention include a construction method for the integral prefabrication of the pipeline 1 and the support structure 2 in stages, including the combination scheme of the pipeline 1 and the support structure 2, construction logic optimization, control of the prefabrication of the pipeline 1 by precise three-dimensional measurement technology, etc.

Specific pre-protection points include:

1) According to the size of the entrance and exit passages of the factory building and the arrangement of items in the room, the module size of the pipeline 1 and support structure 2 assemblies should be reasonably divided.

2) Precise three-dimensional measurement technology is used to measure and locate the interface positions of relevant embedded parts 42 and holes 41 in the room in advance, so as to provide input conditions for the precise prefabrication of pipeline 1 and support structure 2 .

3) Optimize the original serial construction logic of the pipeline 1 and support structure 2 in the room to the parallel assembly line construction of the off-site prefabrication workshop to improve work efficiency.

4) Optimize the manual welding process in the original room to the automatic welding process in the prefabrication workshop to improve the welding quality and efficiency.

It can be understood that the above technical features can be used in any combination without limitation.

The above is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the description of the present invention and the contents of the accompanying drawings, or directly or indirectly used in other related technologies fields, all of which are equally included in the scope of patent protection of the present invention.

Claims (14)

1. A pipeline installation process of a nuclear power station is characterized by comprising the following steps:

s1, presetting a pipeline running mode of a pipeline (1) according to the inlet and outlet positions of the pipeline (1) of an installation space (3);

s2, acquiring position data of a positioning structure (4) for positioning the pipeline (1) in the installation space (3);

s3, manufacturing each pipe section of the pipeline (1) according to a pipe running mode;

s4, pre-positioning each pipe section, and welding each pipe section to obtain a prefabricated pipe (10);

s5, installing the prefabricated pipeline (10) to the positioning structure (4) of the installation space (3).

2. The process of installing a pipeline in a nuclear power plant according to claim 1, wherein in step S3, the length of each pipe segment is set according to the pipe running manner, and each pipe segment is cut and manufactured.

3. The pipe installation process of a nuclear power plant according to claim 1, wherein in the step S4, the position of each pipe section is monitored while the pipe section is pre-positioned.

4. The nuclear power plant piping installation process of claim 3, wherein the positioning of the pipe sections is monitored using a three-dimensional measurement tool.

5. Process for the installation of pipes in nuclear power plants according to claim 4, characterized in that the position of the pipe sections is adjusted when the position of the pipe (1) deviates.

6. The pipe installation process of a nuclear power plant according to claim 1, wherein the positioning structure (4) includes a hole (41) provided in the installation space (3) for passing at least one end of the pipe (1), and the step S5 includes passing an end of the pipe (1) through the hole (41).

7. The pipeline installation process of the nuclear power plant as recited in claim 1, wherein the pipeline (1) comprises a first straight extension section (11), a first bent section (12) and a second straight extension section (13) which are connected in sequence, the first bent section (12) is in a circular arc shape, and an included angle is formed between a third straight extension section (15) of the first straight extension section (11) and the second straight extension section (13).

8. The process for installing pipes in nuclear power plants according to any of claims 1 to 7, characterized in that said step S1 further comprises presetting the specifications of the support structure (2) supporting said pipes (1) according to the installation space (3);

the step S2 further comprises obtaining position data of the positioning structure (4) for positioning the support structure (2);

said step S3 further comprises making said support structure (2);

the step S4 further comprises mounting the support structure (2) onto the pipeline (1) resulting in a prefabricated pipeline (10);

the step S5 further comprises mounting the support structure (2) to the positioning structure (4) of an installation space (3).

9. The pipe installation process of a nuclear power plant according to claim 8, characterized in that the positioning structure (4) includes an embedment (42) provided in the installation space (3), and the step S5 includes installing the support structure (2) to the embedment (42).

10. The process for installing pipelines in nuclear power plants according to claim 9, characterized in that said supporting structure (2) comprises a support seat (21) and a clamp (22), and in that said step S4 further comprises clamping said support seat (21) and clamp (22) to said pipeline (1) and locking said support seat (21) and clamp (22);

the step S5 also comprises the step of welding the supporting seat (21) to the embedded part (42).

11. The pipe installation process of a nuclear power plant according to claim 10, wherein the support base (21) includes a clamp base (211), a protection plate (212) and a bracket (213), and the step S3 further includes welding the clamp base (211) and the bracket (213) to both sides of the protection plate (212) respectively, so that the clamp base (211) and the clamp band (22) clamp the pipe (1);

the step S5 further comprises welding the bracket (213) to the embedded part (42).

12. The pipeline installation process of a nuclear power plant according to claim 11, wherein the clamping seat (211) and the clamping hoop (22) are respectively provided with a locking hole, and the step S3 further comprises: the locking piece (23) penetrates through locking holes in the clamping seat (211) and the clamping hoop (22) to lock the clamping seat (211) and the clamping hoop (22) to clamp the pipeline (1).

13. The process of installing nuclear power plant plumbing according to claim 7, wherein robotic automated welding and assembly is used.

14. Process for the installation of pipes in nuclear power plants according to claim 7, characterized in that the prefabricated pipes (10) are made in a prefabrication workshop.

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