Component for measuring flatness of local area of boron-aluminum spent fuel storage grillwork bottom plate

Abstract

The utility model discloses a boron-aluminum spent fuel storage grillwork base plate local area flatness measuring assembly, which comprises an auxiliary tool, an elevation adjusting block and a theodolite, the height of the auxiliary tool is larger than or equal to that of a storage sleeve, the cross section size of the auxiliary tool is smaller than that of the storage sleeve, the auxiliary tool is vertically placed in the storage sleeve, and the elevation adjusting block is connected with the theodolite. The auxiliary tool comprises an upper end face, a connecting pipe and a lower end face, the two end faces of the connecting pipe are connected with the upper end face and the lower end face respectively, the upper end face is parallel to the lower end face, the upper end face and the lower end face are perpendicular to the axis where the connecting pipe is located, and a plurality of adjusting block containing positions are arranged at the top of the upper end face and located in the same plane. The plurality of elevation adjusting blocks are respectively placed at the plurality of adjusting block placing positions, the axes of the elevation adjusting blocks are parallel to the axis of the auxiliary tool, the theodolite is arranged on one side of the plurality of elevation adjusting blocks, and the plurality of elevation adjusting blocks are adjusted to enable the marking lines on the plurality of elevation adjusting blocks to coincide with the observation line of the theodolite.

Description

Technical Field

[0001] The utility model belongs to the technical field of nuclear power equipment measurement, and in particular relates to a local area flatness measurement component for a bottom plate of a boron-aluminum spent fuel storage grid. Background Art

[0002] Spent fuel storage grids are used to store irradiated fuel assemblies unloaded from the core and spent fuel assemblies whose burnup has not reached the specified limit, or new fuel assemblies to be loaded into the core before and during shutdown for refueling. They play an important role in improving the safety and reliability of nuclear power plant reactor systems.

[0003] The spent fuel storage grid consists of a base plate, storage casing, coaming and adjustment legs. The storage casing is 4265mm high, each storage casing is a storage unit, and there are 1254 storage units in a unit.

[0004] After the spent fuel storage rack storage casing and bottom plate are assembled, according to the technical requirements, the bottom plate flatness within the projection coverage of the storage casing needs to be measured. When measuring the bottom plate flatness, the measuring tool can only enter the measurement from the upper port of the storage casing, but the upper port is 4265mm away from the bottom plate position to be measured. The existing measuring tools on the market cannot meet the measurement requirements of this size, so it is necessary to develop a local area flatness measurement component for the bottom plate of the boron-aluminum spent fuel storage rack. Utility Model Content

[0005] The utility model aims to solve the problems of the prior art and provides a local area flatness measurement component for the bottom plate of a boron-aluminum spent fuel storage grid. In order to ensure the safe storage of the spent fuel assembly, it is possible to detect whether the flatness of the bottom plate inside the storage chamber meets the requirements, and a detection tool is provided for directly detecting the flatness of the bottom plate inside the storage chamber.

[0006] In order to solve the technical problem, the technical scheme of the utility model is: a local area flatness measurement component of the bottom plate of the boron-aluminum spent fuel storage grid, including an auxiliary tooling, an elevation adjustment block and a theodolite, the elevation adjustment block is multiple, the height of the auxiliary tooling is ≥ the height of the storage casing, the cross-sectional size of the auxiliary tooling is < the cross-sectional size of the storage casing, the auxiliary tooling is vertically placed in the storage casing, the auxiliary tooling includes an upper end face, a connecting pipe and a lower end face, the two end faces of the connecting pipe are respectively connected to the upper end face and the lower end face, the upper end face and the lower end face are parallel, and the upper end face and the lower end face are respectively perpendicular to the axis of the connecting pipe, a plurality of adjustment block placement positions are arranged on the top of the upper end face, the plurality of adjustment block placement positions are in the same plane, a plurality of elevation adjustment blocks are respectively placed at the plurality of adjustment block placement positions, the axis of the elevation adjustment block is parallel to the axis of the auxiliary tooling, the theodolite is arranged on one side of the plurality of elevation adjustment blocks, and the plurality of elevation adjustment blocks are adjusted so that the marking lines on the plurality of elevation adjustment blocks coincide with the observation line of the theodolite.

[0007] Preferably, the upper end face and the lower end face have the same size and are both square, and the connecting pipe is a stainless steel cylindrical pipe.

[0008] Preferably, the flatness of the upper end face and the lower end face is ≤0.05 mm, the parallelism of the upper end face and the lower end face is ≤0.05 mm, and the perpendicularity of the upper end face and the lower end face to the axis of the connecting pipe is ≤0.05 mm.

[0009] Preferably, there are four adjustment block placement positions, and the four adjustment block placement positions are arranged at the four corners of the top of the upper end surface.

[0010] Preferably, the adjustment block placement position is an inwardly recessed groove, and the bottoms of the grooves of the four adjustment block placement positions are in the same plane.

[0011] Preferably, a lifting threaded hole is provided at the center of the upper end surface, and the lifting threaded hole is used for threaded connection with a lifting auxiliary tooling of a lifting eye screw.

[0012] Preferably, a through hole is provided at the center of the lower end surface, and the through hole is used to avoid the adjustment legs at the bottom of the storage sleeve.

[0013] Compared with the prior art, the advantages of the utility model are:

[0014] (1) The utility model provides a local area flatness measurement assembly for the bottom plate of a boron-aluminum spent fuel storage grid, comprising an auxiliary tool, an elevation adjustment block and a theodolite, wherein the auxiliary tool is vertically placed in a storage casing at the same height, the elevation adjustment block is placed at the four corners of the top of the auxiliary tool, and the theodolite is arranged on one side of the elevation adjustment block. A plurality of elevation adjustment blocks are adjusted so that the marking lines on the plurality of elevation adjustment blocks coincide with the observation line of the theodolite, and the elevation dimensions of the elevation adjustment blocks are counted, and the maximum difference in the elevation dimensions is the local flatness of the bottom plate;

[0015] (2) The measuring assembly of the utility model converts the flatness to be measured into the elevation dimension difference of the elevation adjustment block through the auxiliary tooling, so that the operator can accurately calculate the measurement result without lowering the inspection standard. It is able to accurately measure the flatness of the local area of ​​the bottom plate of the boron-aluminum spent fuel storage grid, which is a significant improvement in technology and operation.

[0016] (3) The utility model has a simple and unique structural design, a scientific and rigorous measuring principle, and is fast and convenient to measure with high accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 , a schematic diagram of the use of a component for measuring the flatness of a local area of ​​a bottom plate of a boron-aluminum spent fuel storage grid according to the utility model;

[0018] Figure 2 , a schematic diagram of the structure of the auxiliary tooling of the utility model;

[0019] Figure 3 , a schematic diagram of the upper end surface structure of the auxiliary tooling of the utility model;

[0020] Figure 4 , schematic diagram of the lower end surface structure of the auxiliary tooling of the utility model.

[0021] Description of reference numerals:

[0022] 1. Auxiliary tooling, 2. Elevation adjustment block, 3. Theodolite;

[0023] 1-1, upper end surface, 1-2, connecting pipe, 1-3, lower end surface;

[0024] 1-1-1, adjust the block placement, 1-1-2, lifting threaded hole;

[0025] 1-3-1, through hole. DETAILED DESCRIPTION

[0026] The following describes the specific implementation of the utility model in conjunction with embodiments:

[0027] It should be noted that the structures, proportions, sizes, etc. shown in this specification are only used to match the contents disclosed in the specification so that people familiar with this technology can understand and read them, and are not used to limit the conditions under which the present invention can be implemented. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0028] Example 1

[0029] like Figures 1 to 4As shown, the utility model discloses a local area flatness measurement assembly for the bottom plate of a boron-aluminum spent fuel storage grid, comprising an auxiliary tool 1, an elevation adjustment block 2 and a theodolite 3, wherein the elevation adjustment block 2 is multiple, the height of the auxiliary tool 1 is ≥ the height of the storage casing, the cross-sectional size of the auxiliary tool 1 is < the cross-sectional size of the storage casing, the auxiliary tool 1 is vertically placed in the storage casing, the auxiliary tool 1 comprises an upper end face 1-1, a connecting pipe 1-2 and a lower end face 1-3, the two end faces of the connecting pipe 1-2 are respectively connected to the upper end face 1-1 and the lower end face 1-3, the upper end face 1-1 and the lower end face 1-3 is parallel, and the upper end face 1-1 and the lower end face 1-3 are respectively perpendicular to the axis of the connecting pipe 1-2, a plurality of adjustment block placement positions 1-1-1 are arranged on the top of the upper end face 1-1, and the plurality of adjustment block placement positions 1-1-1 are in the same plane, a plurality of elevation adjustment blocks 2 are respectively placed at the plurality of adjustment block placement positions 1-1-1, and the axis of the elevation adjustment block 2 is parallel to the axis of the auxiliary tooling 1, and the theodolite 3 is arranged on one side of the plurality of elevation adjustment blocks 2, and the plurality of elevation adjustment blocks 2 are adjusted so that the marking lines on the plurality of elevation adjustment blocks 2 coincide with the observation line of the theodolite 3.

[0030] Example 2

[0031] like Figure 2 As shown, preferably, the upper end surface 1-1 and the lower end surface 1-3 have the same size and are both square, and the connecting pipe 1-2 is a stainless steel cylindrical tube.

[0032] like Figure 2 As shown, preferably, the flatness of the upper end surface 1-1 and the lower end surface 1-3 is ≤0.05mm, the parallelism of the upper end surface 1-1 and the lower end surface 1-3 is ≤0.05mm, and the perpendicularity of the upper end surface 1-1 and the lower end surface 1-3 to the axis of the connecting pipe 1-2 is ≤0.05mm.

[0033] Example 3

[0034] like Figure 1 , 3 As shown, preferably, there are four adjustment block placement positions 1-1-1, and the four adjustment block placement positions 1-1-1 are arranged at the four top corners of the upper end surface 1-1.

[0035] like Figure 1 , 3 As shown, preferably, the adjustment block placement position 1-1-1 is an inwardly recessed groove, and the bottoms of the grooves of the four adjustment block placement positions 1-1-1 are in the same plane.

[0036] Example 4

[0037] like Figure 1 , 3As shown, preferably, a lifting threaded hole 1-1-2 is opened at the center of the upper end surface 1-1, and the lifting threaded hole 1-1-2 is used for threaded connection with the lifting auxiliary tooling of the eye screw.

[0038] like Figure 4 As shown, preferably, a through hole 1-3-1 is opened at the center of the lower end surface 1-3, and the through hole 1-3-1 is used to avoid the adjustment leg at the bottom of the storage sleeve.

[0039] Example 5

[0040] Manufacture an equal height auxiliary tool 1, the length of which is about 4300mm, the cross-sectional size of which is about 200X200, the accuracy requirements of the flatness of the upper and lower end faces ≤0.05mm, the parallelism of the upper and lower end faces ≤0.05mm, the perpendicularity of the upper and lower end faces to the tool axis ≤0.05mm, and the tool needs to be measured with the elevation adjustment block 2.

[0041] Place the auxiliary tooling 1 in the storage casing chamber, select 4 adjustment block placement positions 1-1-1 (as close to the four corners as possible) on the upper end surface 1-1 of the auxiliary tooling 1, place the elevation adjustment blocks 2 at the 4 adjustment block placement positions 1-1-1 respectively, adjust the height of the elevation adjustment block 2 so that the marking line on the elevation adjustment block 2 coincides with the observation line of the theodolite 3, measure the height of the elevation adjustment block 2 with a caliper to indirectly obtain the elevation values ​​of the 4 adjustment block placement positions 1-1-1, and the maximum elevation difference is the local flatness of the base plate.

[0042] The angle between the observation angle of the theodolite 3 and the vertical line is 90°.

[0043] The working principle of the utility model is as follows:

[0044] like Figures 1 to 4 As shown, the utility model discloses a local area flatness measuring assembly for a bottom plate of a boron-aluminum spent fuel storage grid, comprising an auxiliary tool 1, an elevation adjustment block 2 and a theodolite 3. The auxiliary tool 1 is vertically placed in a storage casing at the same height, the elevation adjustment block 2 is placed at the four corners of the top of the auxiliary tool 1, and the theodolite 3 is arranged on one side of the elevation adjustment block 2. A plurality of elevation adjustment blocks 2 are adjusted so that the marking lines on the plurality of elevation adjustment blocks 2 coincide with the observation line of the theodolite 3. The elevation dimensions of the elevation adjustment blocks are counted, and the maximum difference in the elevation dimensions is the local flatness of the bottom plate.

[0045] When in use, first place the spent fuel storage grid product upright on the ground, and use the theodolite to adjust the verticality of the product to ensure that the verticality of the product is within 1.5mm; secondly, use the eye screw to lift the auxiliary tooling, and slowly put the auxiliary tooling 1 into each storage casing to ensure that the only contact between the auxiliary tooling 1 and the product is the lower end surface 1-3 and the bottom plate plane of the auxiliary tooling 1, and the auxiliary tooling 1 does not tip over in the small room; after stabilization, remove the lifting rope, use the elevation adjustment block 2 to measure the elevation values ​​of 4 points (H1, H2, H3, H4) on the upper end surface 1-1 of the auxiliary tooling 1 using the theodolite 3, and then select the maximum and minimum values ​​of the 4 values, and the calculation result obtained by subtracting the minimum value from the maximum value is the flatness of the bottom plate of the storage cell.

[0046] The measuring assembly of the utility model converts the flatness to be measured into the elevation size difference of the elevation adjustment block through the auxiliary tooling, so that the operator can accurately calculate the measurement result without lowering the detection standard, and can accurately measure the flatness of the local area of ​​the bottom plate of the boron-aluminum spent fuel storage grid, which has a significant improvement in technology and operation.

[0047] The utility model has simple and unique structural design, scientific and rigorous measuring principle, fast and convenient measuring and high accuracy.

[0048] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of ordinary technicians in this field without departing from the purpose of the present invention.

[0049] Many other changes and modifications can be made without departing from the concept and scope of the utility model. It should be understood that the utility model is not limited to a specific embodiment, and the scope of the utility model is defined by the appended claims.

Claims

1. A component for measuring the flatness of a local area of ​​a bottom plate of a boron-aluminum spent fuel storage grid, characterized in that: The invention comprises an auxiliary tool (1), an elevation adjustment block (2) and a theodolite (3), wherein the elevation adjustment block (2) is multiple, the height of the auxiliary tool (1) is greater than or equal to the height of the storage casing, the cross-sectional size of the auxiliary tool (1) is less than the cross-sectional size of the storage casing, the auxiliary tool (1) is vertically placed in the storage casing, the auxiliary tool (1) comprises an upper end surface (1-1), a connecting pipe (1-2) and a lower end surface (1-3), the two end surfaces of the connecting pipe (1-2) are respectively connected to the upper end surface (1-1) and the lower end surface (1-3), the upper end surface (1-1) and the lower end surface (1-3) are parallel, and the upper end surface (1-1) and the lower end surface (1-3) are parallel to each other. The lower end surfaces (1-3) are respectively perpendicular to the axis of the connecting pipe (1-2); a plurality of adjustment block placement positions (1-1-1) are arranged on the top of the upper end surface (1-1); the plurality of adjustment block placement positions (1-1-1) are located in the same plane; a plurality of elevation adjustment blocks (2) are respectively placed at the plurality of adjustment block placement positions (1-1-1); the axis of the elevation adjustment blocks (2) is parallel to the axis of the auxiliary tooling (1); the theodolite (3) is arranged on one side of the plurality of elevation adjustment blocks (2); the plurality of elevation adjustment blocks (2) are adjusted so that the marking lines on the plurality of elevation adjustment blocks (2) coincide with the observation line of the theodolite (3).

2. The local area flatness measurement assembly for the bottom plate of the boron-aluminum spent fuel storage grid according to claim 1, characterized in that: The upper end surface (1-1) and the lower end surface (1-3) have the same size and are both square, and the connecting pipe (1-2) is a stainless steel cylindrical pipe.

3. The local area flatness measurement assembly for the bottom plate of the boron-aluminum spent fuel storage grid according to claim 1, characterized in that: The flatness of the upper end surface (1-1) and the lower end surface (1-3) is ≤0.05 mm, the parallelism of the upper end surface (1-1) and the lower end surface (1-3) is ≤0.05 mm, and the perpendicularity of the upper end surface (1-1) and the lower end surface (1-3) to the axis of the connecting pipe (1-2) is ≤0.05 mm.

4. The local area flatness measurement assembly for the bottom plate of the boron-aluminum spent fuel storage grid according to claim 2, characterized in that: There are four adjustment block placement positions (1-1-1), and the four adjustment block placement positions (1-1-1) are arranged at the four top corners of the upper end surface (1-1).

5. The local area flatness measurement assembly for the bottom plate of the boron-aluminum spent fuel storage grid according to claim 2, characterized in that: The adjustment block placement position (1-1-1) is an inwardly recessed groove, and the bottoms of the grooves of the four adjustment block placement positions (1-1-1) are located in the same plane.

6. The local area flatness measurement assembly for the bottom plate of the boron-aluminum spent fuel storage grid according to claim 1, characterized in that: A lifting threaded hole (1-1-2) is provided at the centre of the upper end surface (1-1), and the lifting threaded hole (1-1-2) is used for threaded connection with a lifting auxiliary tooling of a lifting eye screw.

7. The local area flatness measurement assembly for the bottom plate of the boron-aluminum spent fuel storage grid according to claim 1, characterized in that: A through hole (1-3-1) is provided at the center of the lower end surface (1-3), and the through hole (1-3-1) is used to avoid the adjustment leg at the bottom of the storage sleeve.

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