Measuring device of nuclear power plant fuel transfer device track and measuring method thereof

Abstract

The invention discloses a nuclear power plant fuel transfer device track measuring device and method, and the device comprises a first tool which is disposed at a joint of a track, and is provided with a total station, and guarantees the orientation direction of the total station to be parallel to the track; the second tool is installed on a supporting leg of the track, and a level gauge is installed on the second tool and used for accurately measuring the elevation; the magnetic attraction type steel straight ruler is adsorbed on the track and is used for measuring the elevation; and the laser tracker target ball is matched with the total station and is used for accurately adjusting the position. The measuring precision is improved, the angle deviation and the elevation error are weakened, the working efficiency is improved, the track mounting time is shortened, and the tool is simple in structure, high in adaptability and capable of being repeatedly used.

Description

Technical Field

[0001] This invention relates to the technical field of fuel transfer track measurement, and more particularly to a measuring device and method for the track of a nuclear power plant fuel transfer device. Background Technology

[0002] The fuel transfer unit at the Hualong One nuclear power plant is part of the plant's PMC (Polarization, Control, and Management) system, used for transferring fuel assemblies between the fuel building and the reactor building. The fuel transfer channel features a fully enclosed shielded design, filled with inert gas to prevent fuel oxidation, and equipped with high-precision segmented stainless steel rails (installation error ≤ ±1mm). Automated fuel transfer vehicles safely transport fuel assemblies between the reactor building and the fuel building. Its features include multiple redundant safety systems (dual power supply, shock resistance ≥0.3g), laser calibration positioning, and a lead-steel composite shielding layer, significantly improving radiation protection levels and operational reliability, making it more efficient and safer than traditional designs.

[0003] In existing technologies, total stations or levels are typically used for measurement. However, due to the segmented installation of the track and the high precision requirements, traditional methods are difficult to achieve efficient and high-precision measurements. Therefore, there is an urgent need for a new type of measuring device and method to solve the above problems. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a measuring device for the track of a nuclear power plant fuel transfer device, which improves measurement accuracy, reduces angular deviation and elevation error, improves work efficiency, shortens track installation time, and has a simple tooling structure, strong adaptability, and can be reused.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A measuring device for the track of a nuclear power plant fuel transfer device, comprising: The first fixture is installed at the joint of the track. The total station is installed on the first fixture to ensure that its orientation is parallel to the track. The second tooling is installed on the support leg of the track, and a level is installed on the second tooling for accurate elevation measurement. Magnetic steel ruler: The magnetic steel ruler is attached to the track and used for elevation measurement. The laser tracker target ball is used in conjunction with a total station for precise position adjustment.

[0006] The aforementioned measuring device for the nuclear power plant fuel transfer device track, wherein both the first tooling and the second tooling are located on the central axis of the dual tracks.

[0007] The aforementioned measuring device for the nuclear power plant fuel transfer device track includes a first tooling comprising a side plate assembly and a cross plate assembly. The side plate assembly is fixed to the bolt holes of one of the tracks by bolts, one end of the cross plate assembly is fixedly connected to the side plate assembly, and the other end of the cross plate assembly abuts against the upper side of another track.

[0008] The aforementioned measuring device for the nuclear power plant fuel transfer device track includes a side plate assembly comprising two longitudinally distributed side plates, which clamp one end of the transverse plate assembly and are fixed to one of the tracks by bolts.

[0009] The aforementioned measuring device for the nuclear power plant fuel transfer device track includes a horizontal plate assembly comprising two horizontally arranged horizontal plates, one end of each horizontal plate being clamped and fixed by two side plates, and the other end of each horizontal plate abutting against the upper side of another track.

[0010] The aforementioned measuring device for the nuclear power plant fuel transfer device track has through holes at both ends of each side plate. The through holes on the two side plates are longitudinally aligned. Bolts are passed through the corresponding through holes, and the two side plates are fixed to the bolt holes of one of the tracks.

[0011] The measuring device for the track of the nuclear power plant fuel transfer device mentioned above, wherein the second tooling includes: a mounting plate, four columns at the four corners of the bottom of the mounting plate, the four columns being fixedly connected to the support legs of the track, and a mounting hole in the middle of the mounting plate, to which a level is connected.

[0012] The measuring device for the fuel transfer device track in the aforementioned nuclear power plant has a mounting plate whose length is less than the distance between the two tracks.

[0013] The aforementioned measuring device for the nuclear power plant fuel transfer device track has baffles on both sides of the mounting plate, with the baffles extending downwards.

[0014] A measurement method, wherein the aforementioned measuring device for the nuclear power plant fuel transfer device track is used, the measurement method comprising: S1: Set up measurement reference points for the installation of the fuel transfer device track at the end of the track; S2: Conduct field measurements and determine the measurement data; S3: The track runs north-south. The straightness of the track can be obtained by subtracting the absolute value of the east coordinate of the previous measurement point from the value of the subsequent measurement point. S4: The track gauge of the two tracks is obtained by subtracting the absolute value of the east coordinate data of the two tracks and adding the radii of the two target balls. The center axis of the two tracks is obtained by adding the east coordinate data of the two tracks and dividing by 2. S5: The levelness of a single track is obtained by subtracting the elevation data of the previous measurement point from the subsequent measurement point. The height difference of the same section of the two tracks is obtained by subtracting the absolute values ​​of the elevation coordinates of the same position on the two tracks.

[0015] The present invention, by employing the above-mentioned technology, has the following positive effects compared with the prior art: (1) This invention improves measurement accuracy and reduces angle deviation and elevation error.

[0016] (2) This invention improves work efficiency and shortens track installation time.

[0017] (3) The tooling of the present invention has a simple structure, strong adaptability and can be reused. Attached Figure Description

[0018] Figure 1 This is a front view of the first tooling in the measuring device for the track of the nuclear power plant fuel transfer device of the present invention.

[0019] Figure 2 This is a top view of the first tooling in the measuring device for the track of the nuclear power plant fuel transfer device of the present invention.

[0020] Figure 3 This is a left view of the first tooling in the measuring device for the track of the nuclear power plant fuel transfer device of the present invention.

[0021] Figure 4 This is a schematic diagram of the structure of the second tooling in the measuring device of the nuclear power plant fuel transfer device track of the present invention.

[0022] In the attached diagram: 1. First tooling; 2. Second tooling; 11. Side plate; 12. Horizontal plate; 13. Through hole; 14. Abutment block; 21. Mounting plate; 22. Column; 23. Mounting hole; 24. Baffle. Detailed Implementation

[0023] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] In the description of this invention, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "lateral", and "vertical" are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, and therefore should not be construed as a limitation of this invention.

[0025] It should be noted that the terms "horizontal" and "vertical" in this invention are used to describe approximate positional relationships, and not strictly "horizontal plane" or "vertical plane".

[0026] It should be noted that, unless otherwise specified, the present invention may be used at the angle shown in the accompanying drawings or at an angle other than those shown in the drawings.

[0027] Please see Figures 1 to 4 The diagram illustrates a preferred embodiment of a measuring device for a nuclear power plant fuel transfer device track, comprising: a first fixture 1, a second fixture 2, a magnetic steel ruler, and a laser tracker target ball. The first fixture 1 is installed at the track joint, and a total station is mounted on the first fixture 1 to ensure its orientation is parallel to the track. The second fixture 2 is installed on the track legs, and a level is mounted on the second fixture 2 for precise elevation measurement. The magnetic steel ruler is attached to the track for elevation measurement, and the laser tracker target ball works in conjunction with the total station for precise position adjustment.

[0028] Furthermore, in a preferred embodiment, both the first tooling 1 and the second tooling 2 are located on the central axis of the dual tracks.

[0029] This invention places the total station and level at the center of the double track, avoiding measurement errors caused by structural vibration in the traditional steel-clad tripod support method, and significantly improving data reliability.

[0030] This invention uses a laser tracker target ball and a total station for coordinated measurement, combined with a magnetic steel ruler for rapid detection, which greatly reduces the time that workers spend in extremely narrow spaces of 500mm, thus reducing physical exertion and safety risks.

[0031] The above are merely preferred embodiments of the present invention and are not intended to limit the implementation methods and protection scope of the present invention.

[0032] In addition to the above, the present invention also has the following embodiments: In a further embodiment of the present invention, the first tooling 1 includes a side plate assembly and a cross plate assembly. The side plate assembly is fixed to the bolt hole of one of the rails by bolts. One end of the cross plate assembly is fixedly connected to the side plate assembly, and the other end of the cross plate assembly abuts against the upper side of the other rail.

[0033] In a further embodiment of the present invention, the side plate assembly includes two longitudinally distributed side plates 11, which clamp one end of the transverse plate assembly and are fixed to one of the tracks by bolts.

[0034] In a further embodiment of the present invention, the horizontal plate assembly includes two horizontal plates 12 arranged side by side, one end of each horizontal plate 12 is clamped and fixed by two side plates, and the other end of each horizontal plate 12 abuts against the upper side of another track.

[0035] Each horizontal plate 12 has a stop block 14 at the bottom of its other end, which abuts against the upper side of another track.

[0036] In a further embodiment of the present invention, each side plate 12 is provided with through holes 13 at both ends, and the through holes 13 on the two side plates 12 are longitudinally aligned. Bolts are passed through the corresponding through holes 13, and the two side plates 12 are fixed to the bolt holes of one of the tracks.

[0037] In a further embodiment of the present invention, the second tooling 2 includes: a mounting plate 21, four columns 22 are provided at the four corners of the bottom of the mounting plate 21, the four columns 22 are fixedly connected to the support legs of the track, and a mounting hole 23 is provided in the middle of the mounting plate 21, and the level is connected to the mounting hole 23.

[0038] In a further embodiment of the present invention, the length of the mounting plate 21 is less than the distance between the two tracks.

[0039] In a further embodiment of the present invention, baffles 24 are provided on both sides of the mounting plate 21, and the baffles 24 extend downward.

[0040] The baffle 24 is perpendicular to the mounting plate 21 and is integrally formed.

[0041] A measurement method of the present invention uses the above-mentioned measuring device for the track of a nuclear power plant fuel transfer device. The measurement method includes: S1: Set up measurement reference points for the installation of the fuel transfer device track at the end of the track; S2: Conduct field measurements and determine the measurement data; S3: The track runs north-south. The straightness of the track can be obtained by subtracting the absolute value of the east coordinate of the previous measurement point from the value of the subsequent measurement point. S4: The track gauge of the two tracks is obtained by subtracting the absolute value of the east coordinate data of the two tracks and adding the radii of the two target balls. The center axis of the two tracks is obtained by adding the east coordinate data of the two tracks and dividing by 2. S5: The levelness of a single track is obtained by subtracting the elevation data of the previous measurement point from the subsequent measurement point. The height difference of the same section of the two tracks is obtained by subtracting the absolute values ​​of the elevation coordinates of the same position on the two tracks.

[0042] This invention achieves precise control of the overall track alignment by setting up measurement control points at the end of the track as a reference.

[0043] This invention employs a first fixture 1 and a second fixture 2 to mount the measuring instrument at the center axis of the double rails. This avoids the instrument stability issues caused by mounting the measuring instrument on the steel-clad surface and also integrates the measuring system with the track structure, effectively reducing angular observation errors. For the special working conditions of a 500mm diameter confined space in the fuel transfer channel (where workers can only crawl), a combined operation mode of a laser tracker target ball and a total station is used to measure track straightness, while a magnetic steel ruler is used to measure track levelness. The magnetic steel ruler ensures the ruler remains horizontal, guaranteeing sub-millimeter measurement accuracy even in the confined space of the transfer channel, meeting the precision installation requirements of the special environment of nuclear facilities.

[0044] This invention imports field measurement data into a computer.

[0045] This invention measures the track levelness and height difference at the same cross section by attaching a magnetic steel ruler to the track and using a level. It also measures the track straightness, gauge, and center axis by using a target ball attached to the track elevation and using a total station.

[0046] The measurement method of this invention is low in cost, short in time, and can achieve sub-millimeter accuracy. It is not only suitable for precision installation measurement of fuel transfer tracks in nuclear power plants, but can also be extended to the installation and testing of equipment in other similar confined spaces, and has high engineering application value.

[0047] The above are merely preferred embodiments of the present invention and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should recognize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present invention should be included within the protection scope of the present invention.

Claims

1. A measuring device for the track of a fuel transfer device in a nuclear power plant, characterized in that, include: The first fixture is installed at the joint of the track, and a total station is installed on the first fixture to ensure that its orientation is parallel to the track. The second tooling is installed on the support leg of the track, and a level is installed on the second tooling for accurate elevation measurement; A magnetic steel ruler, which is attached to a track for elevation measurement; A laser tracker target ball, which works in conjunction with the total station, is used for precise position adjustment.

2. The measuring device for the track of a nuclear power plant fuel transfer device according to claim 1, characterized in that, Both the first tooling and the second tooling are located on the central axis of the double track.

3. The measuring device for the track of a nuclear power plant fuel transfer device according to claim 1, characterized in that, The first tooling includes a side plate assembly and a cross plate assembly. The side plate assembly is fixed to the bolt hole of one of the rails by bolts. One end of the cross plate assembly is fixedly connected to the side plate assembly, and the other end of the cross plate assembly abuts against the upper side of the other rail.

4. The measuring device for the track of a nuclear power plant fuel transfer device according to claim 3, characterized in that, The side plate assembly includes two longitudinally distributed side plates, which clamp one end of the transverse plate assembly and are fixed to one of the rails by bolts.

5. The measuring device for the track of a nuclear power plant fuel transfer device according to claim 4, characterized in that, The horizontal plate assembly includes two horizontally arranged horizontal plates, one end of each horizontal plate is clamped and fixed by the two side plates, and the other end of each horizontal plate abuts against the upper side of the other track.

6. The measuring device for the track of a nuclear power plant fuel transfer device according to claim 5, characterized in that, Each of the side plates has through holes at both ends, and the through holes on the two side plates are longitudinally aligned. Bolts are passed through the corresponding through holes to fix the two side plates to the bolt holes of one of the rails.

7. The measuring device for the track of a nuclear power plant fuel transfer device according to claim 1, characterized in that, The second fixture includes: a mounting plate, four columns at the four corners of the bottom of the mounting plate, the four columns being fixedly connected to the support legs of the track, and a mounting hole in the middle of the mounting plate, to which the level is connected.

8. The measuring device for the track of a nuclear power plant fuel transfer device according to claim 7, characterized in that, The length of the mounting plate is less than the distance between the two tracks.

9. The measuring device for the track of a nuclear power plant fuel transfer device according to claim 8, characterized in that, Both sides of the mounting plate are provided with baffles, which extend downwards.

10. A measurement method, characterized in that, The measuring device for the nuclear power plant fuel transfer device track according to any one of claims 1-9, the measuring method comprising: S1: Set up measurement reference points for the installation of the fuel transfer device track at the end of the track; S2: Conduct field measurements and determine the measurement data; S3: The track runs north-south. The straightness of the track can be obtained by subtracting the absolute value of the east coordinate of the previous measurement point from the value of the subsequent measurement point. S4: The track gauge of the two tracks is obtained by subtracting the absolute value of the east coordinate data of the two tracks and adding the radii of the two target balls. The center axis of the two tracks is obtained by adding the east coordinate data of the two tracks and dividing by 2. S5: The levelness of a single track is obtained by subtracting the elevation data of the previous measurement point from the subsequent measurement point. The height difference of the same section of the two tracks is obtained by subtracting the absolute values ​​of the elevation coordinates of the same position on the two tracks.

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