Installation method of IGA operation skill training simulation body

Abstract

The present invention relates to the technical field of skill training for nuclear power plants, and in particular to a method for installing an IGA operation skill training simulator. The method comprises the following steps: assembling the bottom load-bearing bracket of the operation platform in an open area in the lobby on the first floor of a simulated water pool, and hoisting the bracket to the middle platform; setting up a scaffolding platform around the simulated water pool; spot welding the steel pad of the load-bearing bracket to the steel cladding of the middle platform of the simulated water pool; assembling the upper in-core component simulation body and the IGA assembly simulation body as a whole, and hoisting the simulation body to the middle platform; leveling the upper in-core component simulation body; assembling the second-floor platform of the operation platform; using a crane to hoist the lower support ring of the in-core component hoist simulation body to the upper in-core component simulation body; assembling the in-core component hoist simulation body on the first floor; installing scattered components; assembling the IGA hoist; and installing the guide extension column operating tool. The present invention has high installation efficiency, minimizes the installation risk of the overall operation, and meets controllable requirements.

Description

Technical Field

[0001] The present invention relates to the technical field of nuclear power plant skill training, and in particular to an installation method of an IGA operation skill training simulation body. Background Art

[0002] To meet the needs of improving personnel capabilities and conducting on-site process verification, the nuclear power plant's skills training center built a set of AP1000 core instrument grid simulation bodies and their hoist simulation bodies. However, due to the significant differences in installation conditions with the actual equipment on site, the original installation method could not be used. Therefore, a new installation method had to be explored, and a specific installation platform was used to complete the installation of the simulation bodies. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an installation method for an IGA operation skill training simulation body, which has high installation efficiency, minimizes the installation risk of the overall operation and meets controllable requirements.

[0004] The present invention provides an installation method for an IGA operation skill training simulation body, comprising the following steps:

[0005] Step 1: Assemble the load-bearing bracket, connect the bottom of the load-bearing bracket to the bottom steel plate, and hoist the assembled load-bearing bracket to the middle platform of the simulated water pool;

[0006] Step 2: Adjust the load-bearing bracket to the correct position, and spot weld the aligned steel plate of the load-bearing bracket to the steel cladding of the middle platform of the simulated water pool;

[0007] Step 3: Assemble the upper reactor internals simulation body and the IGA assembly simulation body, hoist them to the middle platform of the simulation pool, and place them in the middle position of the bottom load-bearing support;

[0008] Step 4: Level the upper internal component simulation body;

[0009] Adjust the adjustment pad at the bottom of the load-bearing bracket to level the upper support plate of the upper internal component simulation body. After the levelness is adjusted to the right level, spot weld the bottom wedge block of the adjustment pad to the load-bearing bracket, and bolt the upper support plate to the load-bearing bracket.

[0010] Step 5: Assemble the first column, scissor brace and platform of the operating platform into an integral structure, hoist it to the middle platform of the simulated water pool, place it on the bottom load-bearing bracket, and connect and fix it;

[0011] Step 6: Hoist the lower support ring of the internal component hoist simulation body to the upper internal component simulation body;

[0012] Install the lower support ring, three second columns and middle support ring of the internal component lifting device simulation body;

[0013] Step 7: After the assembly, the simulated body of the internals component hoist is hoisted to the middle platform of the simulated water pool and placed on the upper simulated body of the internals component. The guide structure is installed and fixed simultaneously.

[0014] Step 8: Install the remaining parts;

[0015] Step 9: Lift the guide extension column to the upper part of the auxiliary platform of the internal component hoisting device simulation body, pass the guide extension column through the waist-shaped long hole of the auxiliary platform and lower it to the upper part of the upper internal component simulation body IGA guide column. Rotate the guide extension column and connect it to the IGA guide column.

[0016] Step 10: Lift the lower lifting sleeve of the IGA hoist to the upper part of the auxiliary platform of the internal component hoist simulation body, pass the lower lifting sleeve of the IGA hoist through the waist-shaped long hole of the auxiliary platform, and lower it along the guide extension column to the upper part of the IGA guide cylinder. Rotate the lower lifting sleeve until the lower lifting sleeve is hooked with the IGA guide cylinder.

[0017] Step 11: Hoist the IGA spreader support frame assembly above the auxiliary platform, slowly lower it, adjust the position of the IGA spreader lifting tube assembly, and pass the support block of the support frame assembly through the top of the lifting tube until the support frame assembly legs contact the auxiliary platform;

[0018] Step 12: Install the guide extension operating tool.

[0019] In a specific embodiment of the present invention, in step 1, the load-bearing bracket is assembled from two structures, the dimensions of a single structure are 6800mm×3400mm×800mm, and the pre-tightening torque of the bolts connecting the two structures is 550Nm;

[0020] A Ø3400mm hollow structure is provided in the middle of the load-bearing bracket, and 3mm lentil steel plates are laid in the remaining positions.

[0021] In a specific embodiment of the present invention, in step 2, the load-bearing bracket is adjusted and aligned to its position using a crane.

[0022] In a specific embodiment of the present invention, in step 4, the horizontality of the upper end surface of the upper support plate is measured using a laser level, and leveling is performed based on the obtained measurement value.

[0023] In a specific embodiment of the present invention, in step 5, a plurality of first columns are connected to the lower surface of the operating platform, scissor braces are provided between adjacent columns, and the other ends of the first columns are connected and fixed to the load-bearing bracket.

[0024] In a specific embodiment of the present invention, in step 6, the lower support ring serves as the installation basis for the three second columns, and the middle support ring of the in-pile component hoist and the three second columns are assembled. After the assembly is completed, the middle support ring and the three second columns are hoisted as a whole above the upper in-pile component simulation body, and the three second columns are aligned with the installation port of the lower support ring and connected.

[0025] In a specific embodiment of the present invention, the scattered components include upper stairs, lower stairs, walking paths and railings;

[0026] The upper stairs are arranged between the auxiliary platform and the platform, and the lower stairs are arranged between the load-bearing bracket and the platform; the auxiliary platform is flush with the upper end surface of the simulated water pool, and the two are connected by a water pool walking channel; a railing is arranged around the platform.

[0027] In a specific embodiment of the present invention, in step 9, there are 4 groups of guide extension columns, and this step is repeated to install them in sequence.

[0028] In a specific embodiment of the present invention, step 12 specifically includes: lifting the guide extension column operating tool to the top of the auxiliary platform of the in-pillar component hoist simulation body, inserting the guide extension column operating tool into the IGA hoist lifting tube assembly, adjusting the position of the operating tool, and confirming that the operating tool grabbing action is in place.

[0029] In a specific embodiment of the present invention, after step 1, it also includes: setting up scaffolding platforms around the simulated water pool; the scaffolding platforms serve as hanging points for all ropes during installation operations, and a safe operation area is set up on the middle platform of the simulated water pool.

[0030] Compared to existing technologies, this invention combines on-site working conditions and equipment size, while also taking into account on-site industrial safety, and proposes a comprehensive method for installing an IGA operation simulator. This method features a rational installation process, fully considering the entire process flow, resulting in high installation efficiency, minimal overall installation risk, and controllable operation requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the hoisting of the load-bearing bracket at the bottom of the operating platform of the present invention;

[0032] Figure 2 This is a schematic diagram of the hoisting of the upper internal components and the IGA assembly simulation body according to the present invention;

[0033] Figure 3 This is a schematic diagram of the installation of the second-layer bracket of the operating platform of the present invention;

[0034] Figure 4 This is a schematic diagram of the hoisting of the simulated body of the in-pile component hoist according to the present invention;

[0035] Figure 5 This is a schematic diagram of the installation of the IGA spreader of the present invention;

[0036] Description of the marks in the figure:

[0037] 1-Auxiliary platform, 2-Steel pad, 3-Steel cladding of simulated water pool, 4-Upper internal component simulation body and IGA assembly simulation body, 5-Platform, 6-IGA lifting device simulation body, 7-Internal component lifting device simulation body, 8-Crane, 9-Middle platform of simulated water pool, 10-Load-bearing bracket. DETAILED DESCRIPTION

[0038] In order to further understand the present invention, embodiments of the present invention are described below in conjunction with examples. However, it should be understood that these descriptions are only for further illustrating the features and advantages of the present invention, rather than for limiting the present invention.

[0039] IGA is the in-pile instrumentation grid assembly.

[0040] The embodiment of the present invention discloses a method for installing an IGA operation skill training simulation body, such as Figures 1 to 5 As shown, the following steps are included:

[0041] Step 1: Assemble the load-bearing bracket, connect the bottom of the load-bearing bracket to the bottom steel plate, and use a crane to lift the assembled load-bearing bracket to the middle platform of the simulated water pool;

[0042] The load-bearing bracket is assembled from two pieces, with the dimensions of a single piece being 6800mm×3400mm×800mm, and the pre-tightening torque of the connecting bolts of the two pieces being 550Nm;

[0043] A Ø3400mm hollow structure is provided in the middle of the load-bearing bracket, and 3mm lentil steel plates are laid in the remaining positions.

[0044] It also includes: setting up scaffolding platforms around the simulated water pool; the scaffolding platforms serve as hanging points for all ropes during installation operations, and a safe operation area is set up on the middle platform of the simulated water pool for personnel to stand during operations. In the safe operation area, workers use safety belts as safety protection.

[0045] Step 2: Use a crane to adjust and align the load-bearing bracket, and spot weld the aligned steel plate of the load-bearing bracket to the steel cladding of the middle platform of the simulated water pool;

[0046] Step 3: Assemble the upper reactor internals simulation body and the IGA assembly simulation body, hoist them to the middle platform of the simulation pool, and place them in the middle position of the bottom load-bearing support;

[0047] Step 4: Adjust the adjustment pad at the bottom of the load-bearing bracket to level the upper support plate of the upper internals simulation body. Specifically, use a laser level to measure the horizontality of the upper end surface of the upper support plate and perform leveling based on the measured value. After the horizontality is adjusted to the desired level, spot weld the bottom wedge of the adjustment pad to the load-bearing bracket, and then secure the upper support plate and the load-bearing bracket with bolts.

[0048] Step 5: Assemble the first column, scissor brace and platform of the operating platform into an integral structure, hoist it to the middle platform of the simulated water pool, place it on the bottom load-bearing bracket, and secure it with bolts;

[0049] The lower surface of the operating platform is connected to a plurality of first columns, and scissor braces are provided between adjacent columns. The other ends of the first columns are connected and fixed to the load-bearing brackets.

[0050] Step 6: Install the lower support ring, three second columns and the middle support ring of the internal component lifting fixture simulation body;

[0051] Specifically, a crane is used to lift the lower support ring of the in-piles component lifting fixture simulation body, and the lower support ring serves as the installation basis for the three second columns. The middle support ring of the in-piles component lifting fixture and the three second columns are assembled. After the assembly is completed, the middle support ring and the three second columns are lifted as a whole to the top of the upper in-piles component simulation body, and the three second columns are aligned with the installation port of the lower support ring and connected.

[0052] Step 7: After assembling the internal component hoisting device simulation, hoist it to the middle platform of the simulated water pool and place it on the upper internal component simulation. Simultaneously install and secure the guide structure using the hook operating device.

[0053] Step 8: Install the remaining parts;

[0054] The scattered parts include upper stairs, lower stairs, walking paths and railings;

[0055] The upper stairs are arranged between the auxiliary platform and the platform, and the lower stairs are arranged between the load-bearing bracket and the platform; the auxiliary platform is flush with the upper end surface of the simulated water pool, and the two are connected by a water pool walking channel; a railing is arranged around the platform.

[0056] Step 9: Use a crane to hoist the guide extension column to the top of the auxiliary platform for the internal component hoisting device. Lower the guide extension column through the waist-shaped slot of the auxiliary platform to the top of the IGA guide column of the upper internal component simulation body. Rotate the guide extension column to connect it to the IGA guide column. There are three sets of IGA guide extension columns, all of which are installed in place according to this step.

[0057] Step 10: Lift the lower lifting sleeve of the IGA hoist to the upper part of the auxiliary platform of the internal component hoist simulation body, pass the lower lifting sleeve of the IGA hoist through the waist-shaped long hole of the auxiliary platform, and lower it along the guide extension column to the upper part of the IGA guide cylinder. Rotate the lower lifting sleeve until the lower lifting sleeve is hooked with the IGA guide cylinder.

[0058] Step 11: Hoist the IGA spreader support frame assembly to the top of the auxiliary platform using a dedicated lifting chain, slowly lower it, adjust the position of the four IGA spreader lifting tube assemblies, and pass the support blocks of the support frame assembly through the top of the lifting tube until the support frame assembly legs contact the auxiliary platform;

[0059] Step 12: Lift the guide extension column operating tool to the upper part of the auxiliary platform of the in-core component hoist simulation body, insert the guide extension column operating tool into the IGA hoist tube assembly, adjust the operating tool position, and confirm that the operating tool grabbing action is in place.

[0060] The above embodiments are only intended to help understand the method and core concept of the present invention. It should be noted that, without departing from the principles of the present invention, a number of improvements and modifications may be made to the present invention by those skilled in the art, and such improvements and modifications also fall within the scope of protection of the claims of the present invention.

[0061] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for installing an IGA operation skill training simulation body, characterized in that: The following steps are involved: Step 1: Assemble the load-bearing bracket, connect the bottom of the load-bearing bracket to the bottom steel plate, and hoist the assembled load-bearing bracket to the middle platform of the simulated water pool; Step 2: Adjust the load-bearing bracket to the correct position, and spot weld the aligned steel plate of the load-bearing bracket to the steel cladding of the middle platform of the simulated water pool; Step 3: Assemble the upper reactor internals simulation body and the IGA assembly simulation body, hoist them to the middle platform of the simulation pool, and place them in the middle position of the bottom load-bearing support; Step 4: Level the upper internal component simulation body; Adjust the adjustment pad at the bottom of the load-bearing bracket to level the upper support plate of the upper internal component simulation body. After the levelness is adjusted to the right level, spot weld the bottom wedge block of the adjustment pad to the load-bearing bracket, and bolt the upper support plate to the load-bearing bracket. Step 5: Assemble the first column, scissor brace and platform of the operating platform into an integral structure, hoist it to the middle platform of the simulated water pool, place it on the bottom load-bearing bracket, and connect and fix it; Step 6: Hoist the lower support ring of the internal component hoist simulation body to the upper internal component simulation body; Install the lower support ring, three second columns and middle support ring of the internal component lifting device simulation body; Step 7: After the assembly, the simulated body of the internals component hoist is hoisted to the middle platform of the simulated water pool and placed on the upper simulated body of the internals component. The guide structure is installed and fixed simultaneously. Step 8: Install the remaining parts; Step 9: Lift the guide extension column to the upper part of the auxiliary platform of the internal component hoisting device simulation body, pass the guide extension column through the waist-shaped long hole of the auxiliary platform and lower it to the upper part of the upper internal component simulation body IGA guide column. Rotate the guide extension column and connect it to the IGA guide column. Step 10: Lift the lower lifting sleeve of the IGA hoist to the upper part of the auxiliary platform of the internal component hoist simulation body, pass the lower lifting sleeve of the IGA hoist through the waist-shaped long hole of the auxiliary platform, and lower it along the guide extension column to the upper part of the IGA guide cylinder. Rotate the lower lifting sleeve until the lower lifting sleeve is hooked with the IGA guide cylinder. Step 11: Hoist the IGA spreader support frame assembly above the auxiliary platform, slowly lower it, adjust the position of the IGA spreader lifting tube assembly, and pass the support block of the support frame assembly through the top of the lifting tube until the support frame assembly legs contact the auxiliary platform; Step 12: Install the guide extension operating tool.

2. The installation method of the IGA operation skill training simulation body according to claim 1, characterized in that: In step 1, the load-bearing bracket is assembled from two pieces, the dimensions of a single piece are 6800mm×3400mm×800mm, and the pre-tightening torque of the connecting bolts of the two pieces is 550Nm; A Ø3400mm hollow structure is provided in the middle of the load-bearing bracket, and 3mm lentil steel plates are laid in the remaining positions.

3. The installation method of the IGA operation skill training simulation body according to claim 1, characterized in that: In step 2, the load-bearing bracket is adjusted and aligned to its position using a crane.

4. The installation method of the IGA operation skill training simulation body according to claim 1, characterized in that: In step 4, the horizontality of the upper end surface of the upper support plate is measured using a laser level, and leveling is performed based on the obtained measurement value.

5. The installation method of the IGA operation skill training simulation body according to claim 1, characterized in that: In step 5, a plurality of first columns are connected to the lower surface of the operating platform, scissor braces are provided between adjacent columns, and the other ends of the first columns are connected and fixed to the load-bearing brackets.

6. The installation method of the IGA operation skill training simulation body according to claim 1, characterized in that: In step 6, the lower support ring serves as the installation basis for the three second columns, and the middle support ring of the in-pile component hoist and the three second columns are assembled. After the assembly is completed, the middle support ring and the three second columns are hoisted as a whole above the upper in-pile component simulation body, and the three second columns are aligned with the installation opening of the lower support ring and connected.

7. The installation method of the IGA operation skill training simulation body according to claim 1, characterized in that: The scattered parts include upper stairs, lower stairs, walking paths and railings; The upper stairs are arranged between the auxiliary platform and the platform, and the lower stairs are arranged between the load-bearing bracket and the platform; the auxiliary platform is flush with the upper end surface of the simulated water pool, and the two are connected by a water pool walking channel; a railing is arranged around the platform.

8. The installation method of the IGA operation skill training simulation body according to claim 1, characterized in that: In step 9, there are 4 groups of guide extension columns in total, and this step is repeated to install them in sequence.

9. The installation method of the IGA operation skill training simulation body according to claim 1, characterized in that: The step 12 specifically includes: hoisting the guide extension column operating tool to the upper part of the auxiliary platform of the in-core component hoist simulation body, inserting the guide extension column operating tool into the IGA hoist rising tube assembly, adjusting the position of the operating tool, and confirming that the operating tool is in place.

10. The installation method of the IGA operation skill training simulation body according to claim 1, characterized in that: After step 1, the method further includes: setting up scaffolding platforms around the simulated water pool; the scaffolding platforms serve as hanging points for all ropes during installation operations, and a safe operation area is provided on the middle platform of the simulated water pool.

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