High-precision coaxial mounting, positioning and measuring method for nuclear power plant equipment

Abstract

The invention belongs to a positioning measurement method, and particularly relates to a high-precision coaxial installation positioning measurement method for nuclear power plant equipment. The high-precision coaxial mounting, positioning and measuring method for the nuclear power plant equipment comprises the following steps of: 1, arranging mark points according to key position conditions of an equipment body and a mounting hole; 2, carrying out three-dimensional measurement on the equipment body; step 3, modeling equipment body data; 4, performing computer simulation installation; 5, positioning a monitoring instrument; sixthly, monitoring is conducted in the formal installation process. The method provided by the invention has the remarkable effects that the automation degree is high, the influence of manual operation on a result is small, the equipment body 2 can be measured in a manufacturer by virtue of a three-dimensional measurement technology before the equipment arrives, the key size data of the equipment can be obtained, and whether the size meets the installation design requirement or not can be determined in combination with the data of the installation hole; and shutdown and waiting caused by the fact that the size does not meet the design requirement after the equipment arrives are avoided.

Description

Technical Field

[0001] The invention belongs to a positioning measurement method, and in particular relates to a high-precision coaxial installation positioning measurement method for nuclear power plant equipment. Background Art

[0002] The installation project of a nuclear power plant involves a large amount of high-precision coaxial positioning and installation construction work for equipment. The gap between the equipment and the installation hole (foundation) reaches the millimeter level. In order to avoid scratches on the equipment during the installation process and ensure the final accurate coaxial positioning and installation results of the equipment, good positioning measurement control is required during the process.

[0003] In the prior art, for vertically installed equipment, it is necessary to first check the size of the equipment installation hole, and then divide the center according to the actual size of the equipment installation hole, mark it, check the matching of the equipment diameter and the installation hole after the equipment arrives, and install a plumb bob at the bottom center. During the installation process, the plumb bob and the center mark of the installation hole are used to perform a centering check to monitor the coaxiality of the equipment position. This method has high requirements on the on-site environment. The instability of the plumb bob will affect the centering inspection work. At the same time, the skill level of the personnel will directly affect the quality of the equipment placement. The operating steps in the process are cumbersome and inefficient. It is difficult to achieve coaxial positioning of the equipment with a millimeter-level installation gap. In actual construction, the plumb bob at the bottom of the equipment needs to be removed before entering the installation hole. It is difficult to perform a centering check in the subsequent placement. The instability of the placement operation may cause scratches between the equipment and the installation hole, resulting in safety and quality problems.

[0004] In the prior art, for horizontally installed equipment, it is necessary to use a measuring instrument to measure the elevation and coordinates of the center of the bottom of the equipment and the center of the mounting hole respectively, and check whether the center of the bottom of the equipment is on the center axis of the mounting hole. This method requires that the measuring instrument can observe the center of the bottom of the equipment, and the equipment will not be able to be observed when it is close to the mounting hole. It is difficult to perform a subsequent alignment check. The instability of the positioning operation may cause scratches between the equipment and the mounting hole, causing safety and quality problems. At the same time, this method only checks the alignment of the center of the bottom of the equipment and the axis of the mounting hole. If there is a deflection angle between the equipment body and the axis of the mounting hole, it will also affect the positioning of the equipment, requiring the operator to perform careful observation and adjustment. The skill level of the personnel directly affects the construction quality, and it is impossible to achieve coaxial positioning of the equipment with millimeter-level installation clearance. Summary of the invention

[0005] In view of the defects of the prior art, the present invention provides a high-precision coaxial installation positioning measurement method for nuclear power plant equipment.

[0006] The present invention is implemented as follows: a high-precision coaxial installation positioning measurement method for nuclear power plant equipment, which includes the following steps:

[0007] Step 1: Arrange the marking points according to the key positions of the equipment body and the mounting holes;

[0008] Step 2: 3D measurement of the equipment body;

[0009] Step 3: Equipment ontology data modeling;

[0010] Step 4: Computer simulation installation;

[0011] Step 5: Locate monitoring equipment;

[0012] Step 6: Conduct monitoring during the formal installation process.

[0013] The high-precision coaxial installation positioning measurement method for nuclear power plant equipment as described above, wherein the first step: to ensure the coaxiality of the equipment installation, it is necessary to determine the coaxial installation matching position of the equipment body and the mounting hole, and the equipment body mounting matching surface, the mounting bottom surface, and the equipment pipe opening correspond to Figure 5 The inner wall of the mounting hole, the top surface of the mounting hole, and the equipment interface cooperate with each other. After the installation is completed, the gap between them needs to be checked. Sufficient marking points need to be arranged at the above key positions according to the size and manufacturing quality; at the same time, in order to facilitate monitoring during the installation process, marking points need to be arranged around the mounting hole and on the equipment body respectively, and named as positioning points and equipment reset points. There are no less than 5 positioning points and equipment reset points, and they need to be spatially and three-dimensionally distributed within the maximum range that can be observed at the same measuring station. After the positioning points and equipment reset points are arranged, they cannot be moved and each should be numbered separately for record.

[0014] A high-precision coaxial installation positioning measurement method for nuclear power plant equipment as described above, wherein the second step: three-dimensional measurement of the equipment body, respectively measuring the three-dimensional coordinates of the installation matching surface, the installation bottom surface, and the equipment pipe mouth marking points, obtaining the three-dimensional coordinate data of the outer diameter cylindrical surface of the installation matching surface, the installation bottom surface plane, and the inner diameter cylindrical surface of the equipment pipe mouth, and saving the data file after completion; three-dimensional measurement of the installation hole, respectively measuring the three-dimensional coordinates of the inner wall of the installation hole, the top surface of the installation hole, and the equipment interface marking points, obtaining the three-dimensional coordinate data of the inner diameter cylindrical surface of the inner wall of the installation hole, the top surface plane of the installation hole, and the outer diameter cylindrical surface of the equipment interface, and saving the data file after completion.

[0015] A high-precision coaxial installation positioning and measurement method for nuclear power plant equipment as described above, wherein the third step: equipment body data modeling, using the three-dimensional coordinates of the installation matching surface marking points to construct the cylindrical surface and the central axis, the three-dimensional coordinates of the installation bottom surface marking points to construct the plane, the three-dimensional coordinates of the equipment pipe mouth marking points to construct the cylindrical surface, with the center axis of the installation matching surface as the Z axis, and the installation bottom surface plane as the XOY plane, an equipment body coordinate system with the X axis pointing to the 0° direction of the equipment can be defined, and the data file is saved after completion; installation hole data modeling, using the three-dimensional coordinates of the installation hole inner wall marking points to construct the cylindrical surface and the central axis, the three-dimensional coordinates of the installation hole top surface marking points to construct the plane, the three-dimensional coordinates of the equipment interface marking points to construct the cylindrical surface, with the center axis of the installation hole inner wall as the Z axis, and the installation hole top surface plane as the XOY plane, a installation hole coordinate system with the X axis pointing to the 0° direction of the equipment can be defined, and the data file is saved after completion. When performing installation monitoring, the position of the monitoring instrument in the installation hole coordinate system can be located by the positioning point.

[0016] As described above, a high-precision coaxial installation positioning and measurement method for nuclear power plant equipment, wherein the fourth step: first use the equipment body data model to import into the installation hole data model file, the equipment body coordinate system and the installation hole coordinate system completely overlap, and the simulated installation is completed. At this time, it can be checked whether the installation mating surface and the inner wall of the installation hole, the installation bottom surface and the top surface of the installation hole, and the equipment pipe mouth and the equipment interface meet the design and installation requirements.

[0017] As described above, a high-precision coaxial installation positioning measurement method for nuclear power plant equipment, wherein the fifth step: before the equipment installation begins, use the positioning point as a known reference point, and position the monitoring instrument in the installation hole coordinate system in the installation hole data model file in the software.

[0018] As described above, a high-precision coaxial installation positioning measurement method for nuclear power plant equipment, wherein the sixth step: before the installation construction of the equipment body begins, use a monitoring instrument to measure the three-dimensional coordinates of the equipment reset point on the equipment body, and obtain the three-dimensional coordinates of the equipment reset point in the installation hole coordinate system. Through the spatial correspondence of the three-dimensional coordinates, the data model of the equipment body is imported into the installation hole data model file, and the coaxial situation of the equipment body and the installation hole can be checked to guide the equipment installation adjustment until the final installation is completed.

[0019] The significant effect of the present invention is that the method provided by the present invention has a high degree of automation, and the influence of manual operation on the results is small. With the help of three-dimensional measurement technology, the equipment body 2 can be measured at the manufacturer before the equipment arrives, and the key size data of the equipment can be obtained. Combined with the data of the mounting hole 1, it can be determined whether the size meets the installation design requirements, thereby avoiding downtime and waiting caused by the size not meeting the design requirements after the equipment arrives.

[0020] The present invention monitors the installation process in a simulated positioning manner. During the equipment installation process, the deviation of the equipment relative to the installation hole 1 can be monitored at any time, and the positioning adjustment method of the equipment body 2 can be intuitively guided, thereby effectively improving the equipment installation construction efficiency.

[0021] The present invention uses three-dimensional measurement technology to locate the device body 2 through the device reset point 21. The device reset point 21 is arranged at the part of the device body located outside the mounting hole 1. Through the spatial relative relationship between the device reset point 21 and the device body 2, the position of the part of the device body 2 entering the mounting hole 1 in the mounting hole 1 can be calculated and checked, such as: the relative position relationship between the device interface 3 in the device hole 1 and the device body 2, which solves the quality verification problem that the position cannot be directly observed and checked.

[0022] The method of the present invention can conveniently and quickly guide the coaxial installation positioning of the device body 2 without adjusting the position of the monitoring instrument during the installation process by selecting a good positioning point and a device reset point.

[0023] The method of the present invention guides the installation process by using modeling software calculations, and the data processing process is not prone to errors. When all dimensions of the equipment and the mounting holes meet the design requirements, millimeter-level high-precision coaxial installation monitoring can be achieved, and inspectors can also conveniently verify the results by viewing the model. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 : Schematic diagram of vertical installation of equipment;

[0025] Figure 2 : Schematic diagram of horizontal installation of equipment;

[0026] Figure 3 :Diagram of equipment installation;

[0027] Figure 4 :Flowchart of high-precision coaxial installation positioning measurement method for nuclear power plant equipment;

[0028] Figure 5 : A structural diagram of a high-precision coaxial installation and positioning device for nuclear power plant equipment;

[0029] Figure 6 : Figure 5 Front view of

[0030] Figure 7 : Figure 5 A top view of

[0031] Figure 8 : Figure 5 AA section view.

[0032] In the figure: 1. mounting hole, 2. equipment body, 3. equipment interface, 11. positioning point, 12. inner wall of mounting hole, 13. top surface of mounting hole, 14. mounting hole coordinate system, 21. mounting reset point, 22. mounting mating surface, 23. mounting bottom surface, 24. equipment body coordinate system, 25. equipment pipe opening. DETAILED DESCRIPTION

[0033] According to the design requirements of high-precision coaxial installation and positioning of general nuclear power plant equipment, it is necessary to ensure that the central axis of the equipment body 2 is coaxial with the central axis of the installation hole 1 during the installation process. During the installation process, no scratches can occur between the equipment body 2 and the installation hole 1. After the installation is completed, it is necessary to check the gap between the equipment body 2 and the installation hole 1. A high-precision coaxial installation and positioning measurement method for nuclear power plant equipment is given below, including the following steps:

[0034] Step 1: To ensure the coaxiality of the equipment installation, it is necessary to determine the coaxial installation matching position of the equipment body 2 and the mounting hole 1. The mounting matching surface 22 of the equipment body 2, the mounting bottom surface 23, and the equipment nozzle 25 correspond to Figure 5 The inner wall 12 of the middle mounting hole, the top surface 13 of the mounting hole, and the equipment interface 3 cooperate with each other. After the installation is completed, the gap between them needs to be checked. Sufficient marking points need to be arranged at the above key positions according to the size and manufacturing quality; at the same time, in order to facilitate monitoring during the installation process, marking points need to be arranged around the mounting hole 1 and on the equipment body 2, respectively, and named as positioning points 11 and equipment reset points 21. There are no less than 5 points for the positioning points 11 and the equipment reset points 21, and they need to be spatially and three-dimensionally distributed within the maximum range that can be observed at the same measuring station. After the positioning points 11 and the equipment reset points 21 are arranged, they cannot be moved and are numbered separately for record.

[0035] Step 2: Three-dimensional measurement of the equipment body 2, respectively measure the three-dimensional coordinates of the marking points of the mounting mating surface 22, the mounting bottom surface 23, and the equipment nozzle 25, obtain the three-dimensional coordinate data of the outer diameter cylindrical surface of the mounting mating surface 22, the plane of the mounting bottom surface 23, and the inner diameter cylindrical surface of the equipment nozzle 25, and save the data file after completion; three-dimensional measurement of the mounting hole 1, respectively measure the three-dimensional coordinates of the marking points of the mounting hole inner wall 12, the mounting hole top surface 13, and the equipment interface 3, obtain the three-dimensional coordinate data of the inner diameter cylindrical surface of the mounting hole inner wall 12, the plane of the mounting hole top surface 13, and the outer diameter cylindrical surface of the equipment interface 3, and save the data file after completion.

[0036] Step 3: Data modeling of the equipment body 2, using the three-dimensional coordinates of the marking points of the mounting surface 22 to construct the cylindrical surface and the central axis, the three-dimensional coordinates of the marking points of the mounting bottom surface 23 to construct the plane, and the three-dimensional coordinates of the marking points of the equipment nozzle 25 to construct the cylindrical surface. The central axis of the mounting surface 22 is the Z axis, and the plane of the mounting bottom surface 23 is the XOY plane. You can define an equipment body coordinate system 24 with the X axis pointing to the 0° direction of the equipment. Save the data file after completion; Data modeling of the mounting hole 1, using the three-dimensional coordinates of the marking points of the inner wall 12 of the mounting hole to construct the cylindrical surface and the central axis, the three-dimensional coordinates of the marking points of the top surface 13 of the mounting hole to construct the plane, and the three-dimensional coordinates of the marking points of the equipment interface 3 to construct the cylindrical surface. The central axis of the inner wall 12 of the mounting hole is the Z axis, and the plane of the top surface 13 of the mounting hole is the XOY plane. You can define an installation hole coordinate system 14 with the X axis pointing to the 0° direction of the equipment. Save the data file after completion. When performing installation monitoring, you can locate the position of the monitoring instrument in the mounting hole coordinate system 14 through the positioning point 11.

[0037] Step 4: First use the device body 2 data model to import it into the mounting hole 1 data model file. The device body coordinate system 24 completely overlaps with the mounting hole coordinate system 14 to complete the simulated installation. At this time, you can check whether the installation mating surface 22 and the mounting hole inner wall 12, the installation bottom surface 23 and the mounting hole top surface 13, and the equipment pipe mouth 25 and the equipment interface 3 meet the design and installation requirements.

[0038] Step 5: Before the equipment installation begins, use the positioning point 11 as a known reference point and position the monitoring instrument in the software within the mounting hole coordinate system 14 in the mounting hole 1 data model file.

[0039] Step 6: Before the installation of the equipment body 2 begins, use a monitoring instrument to measure the three-dimensional coordinates of the equipment reset point 21 on the equipment body 2, and obtain the three-dimensional coordinates of the equipment reset point 21 under the mounting hole coordinate system 14. Through the spatial correspondence of the three-dimensional coordinates, import the data model of the equipment body 2 into the mounting hole 1 data model file, and you can check the coaxiality of the equipment body 2 and the mounting hole 1 to guide the equipment installation adjustment until the final installation is completed.

[0040] The present invention uses three-dimensional measurement technology to obtain the position data and key dimensions of the installation hole (1) and the device body (2) for simulated installation. When performing three-dimensional measurement on the installation hole (1) and the device body (2), it is necessary to install and arrange the positioning point (11) and the device reset point (21) respectively. The positioning point (11) is used to position the monitoring instrument during the installation process, and the device reset point (21) is used to simulate the positioning of the device during the installation process. By performing monitoring and simulation calculations during the installation process, the posture of the device during the installation process can be accurately guided, so as to achieve the goal of reducing construction risks and ensuring construction quality.

[0041] The invention uses the central axis of the mounting hole (1) as a reference and uses software to simulate the position of the reset device body (2). During the device installation process, the deviation of the device body (2) relative to the central axis of the mounting hole (1) can be quickly checked, and the device coaxial installation process can be guided intuitively and with high precision, making it less likely to make mistakes.

[0042] Through understanding the design requirements, the present invention only needs to measure the key dimensional parts of the installation hole (1) and the equipment body (2) in advance, such as the inner wall of the installation hole (12), the equipment body installation matching surface (22), etc., to perform modeling operations and complete simulated installation, thereby reducing the skill requirements for personnel and alleviating the workload of data processing and modeling.

[0043] The method provided by the present invention can not only meet the requirements for vertical and horizontal coaxial installation monitoring of equipment, but also play a good guiding role in the coaxial installation construction at any inclined angle required by the design, and has good applicability.

Claims

1. A high-precision coaxial installation positioning measurement method for nuclear power plant equipment, characterized in that: The steps include: Step 1: Arrange the marking points according to the key positions of the equipment body and the mounting holes; Step 2: 3D measurement of the equipment body (2); Step 3: Equipment ontology (2) data modeling; Step 4: Computer simulation installation; Step 5: Locate monitoring equipment; Step 6: Conduct monitoring during the formal installation process.

2. A high-precision coaxial installation positioning measurement method for nuclear power plant equipment according to claim 1, characterized in that: Step 1: To ensure the coaxiality of the equipment installation, it is necessary to determine the coaxial installation matching position of the equipment body (2) and the mounting hole (1). The mounting matching surface (22), the mounting bottom surface (23), and the equipment pipe mouth (25) of the equipment body (2) correspond to the inner wall (12) of the mounting hole, the top surface (13) of the mounting hole, and the equipment interface (3) in FIG. 5, respectively. After the installation is completed, it is necessary to check the gaps between them. Sufficient marking points need to be arranged at the above key positions according to the size and manufacturing quality. At the same time, in order to facilitate monitoring during the installation process, it is necessary to arrange marking points around the mounting hole (1) and on the equipment body (2), respectively, and name them as positioning points (11) and equipment reset points (21). The number of positioning points (11) and equipment reset points (21) is not less than 5 points, and they need to be spatially and three-dimensionally distributed within the maximum range that can be observed at the same measuring station. After the positioning points (11) and equipment reset points (21) are arranged, they cannot be moved and are numbered separately for record.

3. A high-precision coaxial installation positioning measurement method for nuclear power plant equipment as described in claim 2, characterized in that: the second step: three-dimensional measurement of the equipment body (2), respectively measuring the three-dimensional coordinates of the marking points of the installation matching surface (22), the installation bottom surface (23), and the equipment pipe mouth (25), obtaining the three-dimensional coordinate data of the outer diameter cylindrical surface of the installation matching surface (22), the plane of the installation bottom surface (23), and the inner diameter cylindrical surface of the equipment pipe mouth (25), and saving the data file after completion; three-dimensional measurement of the installation hole (1), respectively measuring the three-dimensional coordinates of the marking points of the inner wall (12) of the installation hole, the top surface (13) of the installation hole, and the equipment interface (3), obtaining the three-dimensional coordinate data of the inner diameter cylindrical surface of the inner wall (12) of the installation hole, the plane of the top surface (13) of the installation hole, and the outer diameter cylindrical surface of the equipment interface (3), and saving the data file after completion.

4. A high-precision coaxial installation positioning measurement method for nuclear power plant equipment as described in claim 3, characterized in that: the third step: data modeling of the equipment body (2), using the three-dimensional coordinates of the marking points of the installation matching surface (22) to construct a cylindrical surface and a central axis, the three-dimensional coordinates of the marking points of the installation bottom surface (23) to construct a plane, and the three-dimensional coordinates of the marking points of the equipment nozzle (25) to construct a cylindrical surface, with the central axis of the installation matching surface (22) as the Z axis and the plane of the installation bottom surface (23) as the XOY plane, a device body coordinate system (24) with the X axis pointing to the 0° direction of the device can be defined, and the data file is saved after completion ; The data of the mounting hole (1) is modeled, and the cylindrical surface and the central axis are constructed using the three-dimensional coordinates of the marking points on the inner wall of the mounting hole (12), the plane is constructed using the three-dimensional coordinates of the marking points on the top surface of the mounting hole (13), and the cylindrical surface is constructed using the three-dimensional coordinates of the marking points on the device interface (3). The central axis of the inner wall of the mounting hole (12) is taken as the Z axis, and the plane of the top surface of the mounting hole (13) is taken as the XOY plane. A mounting hole coordinate system (14) with the X axis pointing to the 0° direction of the device can be defined. After completion, the data file is saved. When performing installation monitoring, the position of the monitoring instrument in the mounting hole coordinate system (14) can be located through the positioning point (11).

5. A high-precision coaxial installation positioning measurement method for nuclear power plant equipment according to claim 4, characterized in that: Step 4: First, use the data model of the device body (2) to import the data model file of the installation hole (1). The coordinate system of the device body (24) and the coordinate system of the installation hole (14) completely overlap to complete the simulated installation. At this time, you can check whether the mutual cooperation between the installation matching surface (22) and the inner wall of the installation hole (12), the installation bottom surface (23) and the top surface of the installation hole (13), and the device pipe mouth (25) and the device interface (3) meets the design and installation requirements.

6. A high-precision coaxial installation positioning measurement method for nuclear power plant equipment as described in claim 5, characterized in that: Step 5: Before the equipment installation begins, use the positioning point (11) as a known reference point to position the monitoring instrument in the installation hole coordinate system (14) in the installation hole (1) data model file in the software.

7. A high-precision coaxial installation positioning measurement method for nuclear power plant equipment according to claim 6, characterized in that: Step 6: Before the installation of the equipment body (2) begins, use a monitoring instrument to measure the three-dimensional coordinates of the equipment reset point (21) on the equipment body (2), obtain the three-dimensional coordinates of the equipment reset point (21) under the mounting hole coordinate system (14), and import the data model of the equipment body (2) into the mounting hole (1) data model file through the spatial correspondence of the three-dimensional coordinates. The coaxiality of the equipment body (2) and the mounting hole (1) can be checked to guide the equipment installation adjustment until the final installation is completed.

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