Eccentricity measuring method

Abstract

The invention provides an eccentricity measuring method, and relates to the technical field of measurement. The eccentricity measurement method comprises the steps of determining a first profile of a first sample plate, a second profile of a second sample plate, a third profile of a third sample plate and a fourth profile of a fourth sample plate based on a channel inner section profile; a first avoiding hole is formed in the second sample plate, and a second avoiding hole is formed in the fourth center of the fourth sample plate; a connecting pipe penetrates through the first avoiding hole, the second sample plate is placed in the channel, the connecting pipe penetrates through the second avoiding hole, the fourth sample plate is placed on the second sample plate, and when the fourth center is equal to the center of the connecting pipe, a fourth contour is marked on the second sample plate; and taking out the second sample plate from the channel, aligning the second contour with the first contour, and aligning the third contour with a fourth contour marked on the second sample plate to determine the eccentricity between the first sample plate and the third sample plate. According to the invention, the eccentricity between the channel and the connecting pipe can be accurately measured, and the operation is simplified.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of measurement, in particular to a method for measuring eccentricity. BACKGROUND

[0002] A platform is usually arranged above a device (such as a reactor pressure vessel) for workers to work. Since the top end of the device is not flat (such as a conical surface or a curved surface), it is not easy to directly install another device on the top end of the device. Usually, a nozzle is arranged on the top end of the device, so that the nozzle passes through the platform and is connected with another device. Considering that the device will drive the nozzle to shake when the device is running, the passage on the platform is designed to be larger than the nozzle and the nozzle is located in the center of the passage.

[0003] However, when the nozzle is arranged in the center of the passage, deviation is prone to occur, that is, eccentricity is generated. It is necessary to adjust the position of the nozzle based on the eccentricity, but the eccentricity is difficult to be accurately measured. SUMMARY

[0004] The problem solved by the present application is how to accurately measure the eccentricity of the nozzle of the device in the passage.

[0005] To solve the above problems, the present application provides a method for measuring eccentricity, which is applied to a nozzle of a device and a passage through which the nozzle penetrates, comprising: Based on the cross-sectional profile in the passage, the first profile of a first template, the second profile of a second template, the third profile of a third template and the fourth profile of a fourth template are determined, wherein the first profile and the second profile are completely the same as the cross-sectional profile in the passage, the third profile is completely the same as the fourth profile, and the third profile can be completely covered by the cross-sectional profile in the passage; A first avoiding hole is arranged in the interior of the second template, and a second avoiding hole is arranged in the fourth center of the fourth template, wherein the outer cross-sectional profile of the nozzle can be completely covered by the sixth profile of the second avoiding hole, and the fifth profile of the first avoiding hole can be completely covered by the fourth profile; The second template is placed in the passage by penetrating the first avoiding hole through the nozzle, and the fourth template is placed on the second template by penetrating the second avoiding hole through the nozzle, and when the fourth center is equal to the center of the nozzle, the fourth profile is marked on the second template; The second template is taken out from the passage, the second profile is aligned with the first profile, and the third profile is aligned with the fourth profile marked on the second template, so as to determine the eccentricity between the first template and the third template.

[0006] Optionally, the determination of the eccentricity between the first template and the third template comprises: marking a first center of the first template; opening a through hole at a third center of the third template to mark the third center on the first template through the through hole; determining the eccentricity according to the first center and the third center marked on the first template.

[0007] Optionally, the determining of the eccentricity between the first template and the third template comprises: marking a third center of the third template; opening a through hole at a first center of the first template to mark the first center on the third template through the through hole; determining the eccentricity according to the first center and the third center marked on the third template.

[0008] Optionally, before the determining of the eccentricity according to the first center and the third center marked on the first template, comprises: marking a direction point at an edge of the first template, so that the direction point points to a reference object.

[0009] Optionally, before the determining of the eccentricity according to the first center and the third center marked on the third template, comprises: marking a direction point at an edge of the third template, so that the direction point points to a reference object.

[0010] Optionally, the determining of the eccentricity according to the first center and the third center marked on the first template comprises: establishing a coordinate system on the first template, taking the marked first center as the origin, a straight line passing through the marked first center and the direction point as the X axis, and a straight line passing through the marked first center and being perpendicular to the X axis as the Y axis; determining the eccentricity by determining the coordinates of the marked third center in the coordinate system.

[0011] Optionally, the determining of the eccentricity according to the first center and the third center marked on the first template comprises: connecting the marked first center and the direction point on the first template to obtain a first connecting line, and connecting the marked first center and the third center to obtain a second connecting line; determining the size of the eccentricity by measuring the distance of the second connecting line, and determining the direction of the eccentricity by measuring the angle between the second connecting line and the first connecting line.

[0012] Optionally, the determining the eccentricity according to the first center and the third center marked on the third template comprises: establishing a coordinate system on the third template, taking the marked first center as the origin, taking a straight line passing through the marked first center and the azimuth point as the X axis, and taking a straight line passing through the marked first center and perpendicular to the X axis as the Y axis; determining the eccentricity by determining the coordinates of the marked third center on the coordinate system.

[0013] Optionally, the determining the eccentricity according to the first center and the third center marked on the third template comprises: connecting the marked first center and the azimuth point on the third template to obtain a first connecting line, and connecting the marked first center and the third center to obtain a second connecting line; determining the size of the eccentricity by measuring the distance of the second connecting line, and determining the direction of the eccentricity by measuring the angle between the second connecting line and the first connecting line.

[0014] Optionally, the marking comprises at least one of drawing, engraving and spraying.

[0015] The eccentricity measurement method has the advantages that the second profile of the second sample plate identical to the cross-sectional profile in the channel is determined, the second center of the second sample plate is used to replace the channel center, the fourth profile of the fourth sample plate capable of being completely covered by the cross-sectional profile in the channel is determined, and the fourth center of the fourth sample plate is used to replace the connector center. Since the operation of directly measuring the eccentricity between the channel and the connector is complicated and prone to errors, the eccentricity between the second sample plate and the fourth sample plate is measured. The specific process is that a first avoiding hole is formed in the interior of the second sample plate, so that the second sample plate can be smoothly sleeved into the connector and abut against the inner wall of the channel. A second avoiding hole is formed in the fourth center of the fourth sample plate, so that the fourth sample plate can be smoothly sleeved into the connector. The second sample plate is placed in the channel, and the fourth sample plate is placed on the second sample plate. When the fourth center of the fourth sample plate coincides with the connector center, the fourth profile of the fourth sample plate is marked on the second sample plate, and the eccentricity between the second sample plate and the fourth sample plate is measured. Since the first avoiding hole is formed in the interior of the second sample plate, the second center of the second sample plate and the fourth center of the fourth sample plate (i.e. the center of the fourth profile) are not convenient to confirm on the second sample plate. The first profile of the first sample plate identical to the second profile of the second sample plate without the first avoiding hole is determined, and the third profile of the third sample plate identical to the fourth profile of the fourth sample plate without the second avoiding hole is determined. The third profile of the third sample plate is aligned with the fourth profile of the fourth sample plate marked on the second sample plate, and the first profile of the first sample plate is aligned with the second profile of the second sample plate. The eccentricity between the second sample plate and the fourth sample plate is measured by measuring the eccentricity between the first sample plate and the third sample plate, so as to measure the eccentricity between the channel and the connector. The eccentricity between the channel and the connector can be accurately measured, and the operation complexity and the calculation amount are reduced. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a schematic diagram of the prior eccentricity measurement method; Figure 2 It is a flowchart of the eccentricity measurement method of the embodiment of the present application; Figure 3 It is a structural schematic diagram of placing the second sample plate and the fourth sample plate in the channel of the embodiment of the present application; Figure 4 It is a structural schematic diagram of overlapping the first sample plate, the second sample plate and the third sample plate of the embodiment of the present application; Figure 5 It is a schematic diagram of establishing a coordinate system on the first sample plate of the embodiment of the present application; KEY 1, connector; 2, channel; 3, first sample plate; 4, second sample plate; 5, third sample plate; 6, fourth sample plate. DETAILED DESCRIPTION

[0017] In order to make the above objectives, features and advantages of the present application more clear and comprehensible, specific embodiments of the present application are described in detail below with reference to the accompanying drawings. Although some embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms, and should not be interpreted as being limited to the embodiments set forth herein, but rather these embodiments are provided to make the present application more thorough and complete. It should be understood that the drawings and embodiments of the present application are only for illustrative purposes, and are not intended to limit the scope of protection of the present application.

[0018] It should be understood that each step described in the method embodiments of the present application can be performed in different orders, and / or in parallel. In addition, the method embodiments can include additional steps and / or omit the steps shown. The scope of the present application is not limited in this respect.

[0019] As used herein, the term "comprises" and its variations are open-ended, meaning "includes but not limited to"; the term "based on" is "based, at least in part, on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; the term "optionally" means "optional embodiments". Related definitions of other terms will be given in the following description. It should be noted that the "first", "second", etc. concepts mentioned in the present application are only used to distinguish different devices, modules or units, and are not intended to limit the order or interdependence of the functions performed by these devices, modules or units.

[0020] It should be noted that the modification of "one" or "multiple" mentioned in the present application is illustrative rather than limiting, and those skilled in the art should understand that, unless otherwise explicitly indicated in the context, it should be understood as "one or more".

[0021] The names of the messages or information exchanged between the devices in the embodiments of the present application are only for illustrative purposes, and are not intended to limit the scope of the messages or information.

[0022] In the related art, a channel is marked with several points in the circumferential direction, and the position and angle of each point are recorded, such as Figure 1As shown in the figure. The normal distance of each point from the outer wall of the nozzle is measured, and the position of the nozzle is fitted by using the geometric method according to the known inner diameter of the channel, the outer diameter of the nozzle, the normal distance of each point from the outer wall of the nozzle, and the eccentricity of the nozzle relative to the channel is measured. The method has the following disadvantages: the channel needs to be marked with several points in the circumferential direction, and the normal distance of each point from the outer wall of the nozzle needs to be measured, and the position of the nozzle needs to be fitted after measurement by using the geometric method, which is complex to operate; since the normal distance of the annular gap needs to be measured on site, it is difficult to ensure that the measuring tool is perpendicular to the nozzle wall during measurement, which is easy to cause measurement error.

[0023] In view of the problems in the related art, the embodiment provides an eccentricity measurement method.

[0024] As Figure 2 shown, the eccentricity measurement method provided by the embodiment of the application is applied to a nozzle of a device and a channel penetrated by the nozzle, and includes the following steps: S100: determining a first profile of a first template, a second profile of a second template, a third profile of a third template, and a fourth profile of a fourth template based on a channel inner section profile, wherein the first profile and the second profile are completely the same as the channel inner section profile, the third profile is completely the same as the fourth profile, and the third profile can be completely covered by the channel inner section profile; S200: opening a first avoiding hole in the inside of the second template and opening a second avoiding hole in the fourth center of the fourth template, wherein the outer section profile of the nozzle can be completely covered by a sixth profile of the second avoiding hole, and a fifth profile of the first avoiding hole can be completely covered by the fourth profile; S300: placing the second template in the channel by penetrating the first avoiding hole with the nozzle, and placing the fourth template on the second template by penetrating the second avoiding hole with the nozzle, and marking the fourth profile on the second template when the fourth center is equal to the nozzle center; S400: taking out the second template from the channel, aligning the second profile with the first profile, and aligning the third profile with the fourth profile marked on the second template to determine the eccentricity between the first template and the third template.

[0025] Exemplarily, if the inner cross-sectional profile of the passage is circular, the first profile of the first template is also circular, and the first diameter of the first template is equal to the inner cross-sectional diameter of the passage. The second template is identical to the first template. If the third profile of the third template is also circular, the third diameter of the third template is smaller than the inner cross-sectional diameter of the passage. The fourth template is identical to the third template. If the outer cross-sectional profile of the nozzle is circular, a second clearance hole in the fourth template is circular in shape and is located at the fourth center of the fourth template. The sixth diameter of the second clearance hole can be equal to or greater than the outer cross-sectional diameter of the nozzle, so that the fourth template can be placed in the nozzle and then slid along the nozzle to be inside the passage. If a first clearance hole in the second template is also circular in shape, the fifth diameter of the first clearance hole is greater than or equal to the outer cross-sectional diameter of the nozzle and smaller than the fourth diameter of the fourth template, so that the second template can avoid the nozzle when the second template is placed inside the passage. When measuring the eccentricity between the nozzle and the passage at the site of the equipment, the second template is placed in the nozzle and inside the passage, and the fourth template is placed in the nozzle and is in contact with the second template, as shown in FIG. 2. When the sixth diameter of the second clearance hole is equal to the outer cross-sectional diameter of the nozzle, the fourth profile of the fourth template is directly marked on the second template because the fourth center of the fourth template is aligned with the center of the nozzle. When the sixth diameter of the second clearance hole is greater than the outer cross-sectional diameter of the nozzle, the fourth profile of the fourth template needs to be marked on the second template after the fourth center of the fourth template is aligned with the center of the nozzle. The second template is stacked on the first template so that the second profile of the second template is aligned with the first profile of the first template. The third template is stacked on the second template so that the third profile of the third template is aligned with the profile of the fourth template marked on the second template, as shown in FIG. 3. A through hole is formed at the third center of the third template, and the third center of the third template, i.e., the center of the nozzle, is marked on the first template through the through hole. The first center of the first template, i.e., the center of the passage, is also marked on the first template. The eccentricity of the center of the nozzle relative to the center of the passage is measured on the first template. Alternatively, a through hole is formed at the first center of the first template, and the first center of the first template, i.e., the center of the passage, is marked on the third template through the through hole. The third center of the third template, i.e., the center of the nozzle, is also marked on the third template. The eccentricity of the center of the nozzle relative to the center of the passage is measured on the third template. This operation process is not limited to being performed on site and can be performed in an area where it is convenient to operate. Figure 3 Figure 4

[0026] ​​In the embodiment, the second profile of the second template which is completely identical with the cross-sectional profile of the passage is determined, so that the second center of the second template can replace the center of the passage. The fourth profile of the fourth template which can be completely covered by the cross-sectional profile of the passage is determined, so that the fourth center of the fourth template can replace the center of the connector. Since the operation of directly measuring the eccentricity between the passage and the connector is complicated and prone to errors, the eccentricity between the second template and the fourth template is converted to be measured. The specific process is as follows: a first avoiding hole is formed in the interior of the second template, so that the second template can be smoothly sleeved into the connector and attached to the inner wall of the passage. A second avoiding hole is formed in the fourth center of the fourth template, so that the fourth template can be smoothly sleeved into the connector. The second template is placed in the passage, and the fourth template is placed on the second template. When the fourth center of the fourth template coincides with the center of the connector, the fourth profile of the fourth template is marked on the second template, and the eccentricity between the second template and the fourth template is measured. Since the first avoiding hole is formed in the interior of the second template, it is inconvenient to confirm the second center of the second template and the fourth center (i.e. the center of the fourth profile) of the fourth template on the second template. The first profile of the first template which is completely identical with the second profile of the second template without the first avoiding hole is determined, and the third profile of the third template which is completely identical with the fourth profile of the fourth template without the second avoiding hole is determined. The third profile of the third template is aligned with the fourth profile of the fourth template marked on the second template, and the first profile of the first template is aligned with the second profile of the second template. The eccentricity between the second template and the fourth template is measured by measuring the eccentricity between the first template and the third template, so that the eccentricity between the passage and the connector is measured. The present application can not only accurately measure the eccentricity between the passage and the connector, but also reduce the complexity of the operation and the amount of calculation.

[0027] Optionally, the determining the eccentricity between the first template and the third template comprises: marking a first center of the first template; forming a through hole in a third center of the third template, so as to mark the third center on the first template through the through hole; determining the eccentricity according to the first center and the third center marked on the first template.

[0028] Optionally, before the determining the eccentricity according to the first center and the third center marked on the first template, the method comprises: marking a direction point on an edge of the first template, so that the direction point points to a reference object.

[0029] Optionally, as shown in the method, the determining the eccentricity according to the first center and the third center marked on the first template comprises: Figure 5 ​establishing a coordinate system on the first template, taking the marked first center as the origin, taking a straight line passing through the marked first center and the azimuth point as the X axis, and taking a straight line passing through the marked first center and perpendicular to the X axis as the Y axis; The eccentricity is determined by determining the coordinates of the marked third center in the coordinate system.

[0030] Optionally, the determining of the eccentricity according to the marked first center and the marked third center on the first template comprises: connecting the marked first center and the azimuth point on the first template to obtain a first connecting line, and connecting the marked first center and the marked third center to obtain a second connecting line; The size of the eccentricity is determined by measuring the distance of the second connecting line, and the direction of the eccentricity is determined by measuring the angle between the second connecting line and the first connecting line.

[0031] In the optional embodiment, the third center of the third template is marked on the first template by means of a through hole. In this way, the passage center and the connection pipe center are in the same plane, the coordinates of the passage center and the connection pipe center can be obtained by establishing a coordinate system with an azimuth point, the eccentricity of the connection pipe center relative to the passage center is obtained by subtracting the coordinates of the passage center from the coordinates of the connection pipe center, and the distance from the passage center to the connection pipe center can be directly measured to obtain the direction of the connection pipe center relative to the passage center.

[0032] Optionally, the determining of the eccentricity between the first template and the third template comprises: marking a third center of the third template; opening a through hole in the first center of the first template to mark the first center on the third template through the through hole; determining the eccentricity according to the marked first center and the marked third center on the third template.

[0033] Optionally, before the determining of the eccentricity according to the marked first center and the marked third center on the third template, the method comprises: marking an azimuth point on the edge of the third template, so that the azimuth point points to a reference object.

[0034] Optionally, the determining of the eccentricity according to the marked first center and the marked third center on the third template comprises: establishing a coordinate system on the third template, taking the marked first center as the origin, taking a straight line passing through the marked first center and the azimuth point as the X axis, and taking a straight line passing through the marked first center and perpendicular to the X axis as the Y axis. The eccentricity is determined by determining the coordinates of the third center of the mark on the coordinate system.

[0035] Optionally, the determining the eccentricity according to the first center and the third center of the mark on the third template comprises: connecting the first center of the mark and the azimuth point on the third template to obtain a first connecting line, and connecting the first center of the mark and the third center of the mark to obtain a second connecting line; The size of the eccentricity is determined by measuring the distance of the second connecting line, and the direction of the eccentricity is determined by measuring the angle between the second connecting line and the first connecting line.

[0036] In the optional embodiment, the first center of the first template is marked on the third template by means of opening a through hole. In this way, the channel center and the connection pipe center are on the same plane, and the coordinates of the channel center and the connection pipe center can be obtained by finding an azimuth point to establish a coordinate system. The eccentricity of the connection pipe center relative to the channel center is obtained by subtracting the coordinates of the channel center from the coordinates of the connection pipe center. The distance from the channel center to the connection pipe center can also be directly measured, and the direction of the connection pipe center relative to the channel center can be obtained by finding an azimuth point.

[0037] Optionally, the marking comprises at least one of drawing, engraving and spraying.

[0038] Although the present application has been disclosed as above, the protection scope of the present application is not limited to this. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application, and these changes and modifications shall fall within the protection scope of the present application.

Claims

1. A method for measuring eccentricity, applied to a connector of equipment and a channel penetrated by the connector, characterized in that, include: Based on the cross-sectional profile within the channel, the first profile of the first template, the second profile of the second template, the third profile of the third template, and the fourth profile of the fourth template are determined. The first profile and the second profile are exactly the same as the cross-sectional profile within the channel, the third profile is exactly the same as the fourth profile, and the third profile can be completely covered by the cross-sectional profile within the channel. A first clearance hole is opened inside the second template, and a second clearance hole is opened at the fourth center of the fourth template, wherein the outer cross-sectional profile of the pipe can be completely covered by the sixth profile of the second clearance hole, and the fifth profile of the first clearance hole can be completely covered by the fourth profile. The second template is placed in the channel through the first clearance hole via the connector, and the fourth template is placed on the second template through the second clearance hole via the connector. When the fourth center is equal to the center of the connector, the fourth contour is marked on the second template. The second template is removed from the channel, the second contour is aligned with the first contour, and the third contour is aligned with the fourth contour marked on the second template to determine the eccentricity between the first template and the third template.

2. The eccentricity measurement method according to claim 1, characterized in that, Determining the eccentricity between the first template and the third template includes: Mark the first center of the first template; A through hole is made at the third center of the third template so that the third center is marked on the first template through the through hole; The eccentricity is determined based on the first center and the third center marked on the first template.

3. The eccentricity measurement method according to claim 1, characterized in that, Determining the eccentricity between the first template and the third template includes: Mark the third center of the third template; A through hole is made at the first center of the first template so that the first center is marked on the third template through the through hole; The eccentricity is determined based on the first center and the third center marked on the third template.

4. The eccentricity measurement method according to claim 2, characterized in that, Before determining the eccentricity based on the first center and the third center marked on the first template, the process includes: Mark directional points on the edge of the first template so that the directional points point towards the reference object.

5. The eccentricity measurement method according to claim 3, characterized in that, Before determining the eccentricity based on the first center and the third center marked on the third template, the process includes: Mark directional points on the edge of the third template so that the directional points point towards the reference object.

6. The eccentricity measurement method according to claim 4, characterized in that, Determining the eccentricity based on the first center and the third center marked on the first template includes: Establish a coordinate system on the first template, with the first marked center as the origin, the straight line passing through the first marked center and the point of orientation as the X-axis, and the straight line passing through the first marked center and perpendicular to the X-axis as the Y-axis. The eccentricity is determined by determining the coordinates of the third center of the marker in the coordinate system.

7. The eccentricity measurement method according to claim 4, characterized in that, Determining the eccentricity based on the first center and the third center marked on the first template includes: On the first template, the first center of the mark is connected to the azimuth point to obtain a first line, and the first center of the mark and the third center are connected to obtain a second line; The magnitude of the eccentricity is determined by measuring the distance between the second connecting line and the first connecting line, and the direction of the eccentricity is determined by measuring the angle between the second connecting line and the first connecting line.

8. The method for measuring eccentricity according to claim 5, characterized in that, Determining the eccentricity based on the first center and the third center marked on the third template includes: Establish a coordinate system on the third template, with the first marked center as the origin, the straight line passing through the first marked center and the point of orientation as the X-axis, and the straight line passing through the first marked center and perpendicular to the X-axis as the Y-axis. The eccentricity is determined by determining the coordinates of the third center of the marker in the coordinate system.

9. The method for measuring eccentricity according to claim 5, characterized in that, Determining the eccentricity based on the first center and the third center marked on the third template includes: On the third template, a first line is formed by connecting the first center of the mark and the azimuth point, and a second line is formed by connecting the first center of the mark and the third center. The magnitude of the eccentricity is determined by measuring the distance between the second connecting line and the first connecting line, and the direction of the eccentricity is determined by measuring the angle between the second connecting line and the first connecting line.

10. The method for measuring eccentricity according to any one of claims 1 to 9, characterized in that, The marking includes at least one of drawing, engraving, and spraying.

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