Method and device for measuring circle center of fitting-out pipe fitting with shielded sight line

Abstract

The invention discloses a method and a device for measuring the circle center of an outfitting pipe fitting with a shielded sight line, the device for measuring the circle center of the outfitting pipe fitting is designed, the device is arranged on a pipe flange of the outfitting pipe fitting, and the circle center of the pipe is guided and transferred into a measurement visual angle of a total station by using the device, so that the measurement of the circle center of the outfitting pipe fitting is realized. The three-dimensional coordinate of the target center of the measuring target on the device is measured by the total station, and then the three-dimensional coordinate of the circle center of the pipe is calculated, so that the actual position deviation of the circle center of the pipe is judged, the problems that the circle center of the pipe is shielded and cannot be measured and the total station needs to be carried back and forth are effectively solved, the measuring difficulty is reduced, and the measuring efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of shipbuilding, and particularly to a method and device for measuring the center of a fitting pipe with an obstructed line of sight. Background Art

[0002] At present, major domestic shipbuilding enterprises have introduced the relatively advanced total station measurement equipment to detect the dimensional accuracy of the hull structure, fitting pipes and other types of products, and the application of this equipment has been widely popularized. The total station measurement is carried out by aiming at the local points of the object to be measured. However, for the relatively complex structural form of the hull, the fitting pipes are affected by objective factors such as rib plates, scaffolding and improper placement of segments, resulting in the obstruction of the total station line of sight. Usually, in such cases, the measurement equipment needs to be moved, which greatly increases the measurement difficulty and reduces the measurement efficiency and accuracy. Summary of the Invention

[0003] In view of this, the present invention provides a method and device for measuring the center of a fitting pipe with an obstructed line of sight to solve the problems existing in the above background art.

[0004] A method for measuring the center of a fitting pipe with an obstructed line of sight specifically includes the following steps:

[0005] S1. Install a pipe center transfer tooling on the pipe end flange of the fitting pipe with an obstructed line of sight;

[0006] The pipe center transfer tooling includes a main board, fixing rods threadedly fixed on the upper, lower, left and right four side surfaces of the main board, and a telescopic measuring rod threadedly fixed on one end surface of the main board. The four fixing rods are respectively arranged along the radial direction of the fitting pipe. A screw rod is vertically fixed at the end of each fixing rod for fixing in the flange hole of the pipe end flange to fix the pipe center transfer tooling at the end of the fitting pipe. A measuring target that rotates 360° in the vertical direction is fixed at the end of the telescopic measuring rod. The four fixing rods and the telescopic measuring rod are all located at the center of their respective main board sides, and the center of the target of the measuring target is located on the center line of the telescopic measuring rod;

[0007] S2. Keep the original measurement position of the total station unchanged, pull the telescopic measuring rod, and adjust the measuring target into the measurement view of the total station;

[0008] S3. Align the measuring beam emitted by the measuring target with the center of the target of the measuring target to obtain the three-dimensional coordinates of the center of the target;

[0009] S4. Calculate the three-dimensional coordinates of the center of the fitting pipe based on the three-dimensional coordinates of the center of the target, the current elongation length of the telescopic measuring rod, the thickness of the main board, and the dimensions of the fixing rods;

[0010] S5. Determine the actual position deviation of the outfitting pipe fittings according to the three-dimensional coordinates of the centers of the outfitting pipe fittings.

[0011] Specifically, scale values are also set on the plate surface of the fixed rod, and the diameter of the outfitting pipe fittings can also be calculated according to the scale values shown on the fixed rod.

[0012] Specifically, the end of the fixed rod is set as a circular tangent plane.

[0013] Specifically, the measurement target includes a target frame fixed at the end of the telescopic measuring rod, a target axis vertically arranged in the target frame, and a target sleeve sleeved on the target axis. The target surface of the target is in a vertical state, and the target can rotate 360° in the vertical direction around the target axis.

[0014] An outfitting pipe fitting center measuring device for measuring with a blocked line of sight includes a main board, fixed rods threadedly fixed on the upper, lower, left, and right four side surfaces of the main board, and a telescopic measuring rod threadedly fixed on one end surface of the main board. The four fixed rods are respectively arranged along the radial direction of the outfitting pipe fittings. A screw rod for fixing in the flange hole of the pipe end flange to fix the pipe center transfer tooling at the end of the outfitting pipe fitting is perpendicularly fixed at the end of each fixed rod. A measuring target that rotates 360° in the vertical direction is fixed at the end of the telescopic measuring rod. The four fixed rods and the telescopic measuring rod are all located at the centers of their respective main board sides. The center of the measuring target is located on the center line of the telescopic measuring rod;

[0015] The measurement target includes a target frame fixed at the end of the telescopic measuring rod, a target axis vertically arranged in the target frame, and a target sleeve sleeved on the target axis. The target surface of the target is in a vertical state, and the target can rotate 360° in the vertical direction around the target axis.

[0016] The beneficial effects of the present invention are:

[0017] By designing an outfitting pipe fitting center measuring device, the present invention installs the device on the pipe flange of the outfitting pipe fitting, uses the device to transfer the pipe center to the measurement view of the total station, measures the three-dimensional coordinates of the center of the measurement target on the device by the total station, and then calculates the three-dimensional coordinates of the pipe center, thereby determining the actual position deviation of the pipe center, effectively solving the problems that the pipe center cannot be measured due to being blocked and the total station needs to be carried back and forth, reducing the measurement difficulty and improving the measurement efficiency. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 It is a schematic structural diagram of a pipe center transfer tooling.

[0020] Figure 2 It is a schematic structural diagram of a main board.

[0021] Figure 3 It is a schematic structural diagram of a measuring light target.

[0022] Figure 4 It is a schematic diagram of the measurement state of the pipe center transfer tooling.

[0023] The meanings of the labels in the figure are as follows:

[0024] 1 is an outfitting pipe fitting,

[0025] 2 is the main board,

[0026] 3 is a fixed rod,

[0027] 4 is a telescopic measuring rod,

[0028] 5 is a measuring target, 51 is a target frame, 52 is a target axis, and 53 is a target.

[0029] 6 is a screw rod. Detailed implementation manners

[0030] To make the objectives, technical solutions, and advantages of the present invention clearer and more understandable, the present invention will be described below through specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present invention.

[0031] The terms used in the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The singular forms "a", "the", and "said" used in the present disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0032] To better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings.

[0033] The present invention provides a method for measuring the center of an outfitting pipe fitting with an obstructed measurement line of sight, which specifically includes the following steps:

[0034] S1. Install a pipe center transfer tooling on the pipe end flange of the outfitting pipe fitting 1 with an obstructed measurement line of sight.

[0035] The pipe center transfer tooling includes a main board 2, fixing rods 3 threadedly fixed on the four side surfaces (top, bottom, left, and right) of the main board 2, and a telescopic measuring rod 4 threadedly fixed on one end surface of the main board 2.

[0036] The main board 2 is used to fixedly install the fixing rods 3 and the telescopic measuring rod 4. The main board 2 can be designed into any symmetric regular shape, such as a rectangle, a circle, etc. In this embodiment, the main board 2 is a square board with a thickness of 20 mm. In actual use, its size, thickness, and shape can be adjusted according to the actual situation. Threaded holes for installing the fixing rods 3 are provided on the four side surfaces (top, bottom, left, and right) of the main board 2, and a threaded hole for installing the telescopic measuring rod 4 is also provided at the center of the front side surface.

[0037] The four fixing rods 3 have exactly the same size and are respectively arranged along the radial direction of the outfitting pipe fitting 1. The four fixing rods 3 are respectively threadedly fixed at the centers of the four side surfaces (top, bottom, left, and right) of the main board 3. A screw rod 6 for fixing in the flange hole of the pipe end flange to fix the pipe center transfer tooling at the end of the outfitting pipe fitting 1 is vertically fixed at the end of each fixing rod 3. When the four fixing rods 3 are fixed to the four side surfaces (top, bottom, left, and right) of the main board 2, they together form a support frame with the main board 2, and the center of the main board 2 is the center of the pipe of the outfitting pipe fitting. The fixing rod can be set as a round rod or a long square rod. In this embodiment, the fixing rod 3 is a long square rod.

[0038] Preferably, the end of the fixing rod 3 is set as a round cutting surface.

[0039] A measuring target 5 that rotates 360° in the vertical direction is fixed at the end of the telescopic measuring rod 4. The measuring target 5 includes a target frame 51 fixed at the end of the telescopic measuring rod 4, a target shaft 52 vertically arranged in the target frame 51, and a target 53 sleeved on the target shaft 52. The target surface of the target 53 is in a vertical state, and the target 53 can rotate 360° around the target shaft 52 in the vertical direction.

[0040] The four fixing rods 3 and the telescopic measuring rod 4 are all located at the centers of their respective main board sides. The center of the target of the measuring target 5 is located on the center line of the telescopic measuring rod 4, that is, the center of the target of the measuring target 5, the center line of the telescopic measuring rod 4, and the center of the main board 2 are all on the same straight line, and the center of the main board 2 is also on the center line of the four fixing rods 3.

[0041] S2. Keep the original measurement position of the total station unchanged (the total station is still placed at the original observation point, and this observation point cannot detect the center of the outfitting pipe fitting due to obstacle occlusion), pull the telescopic measuring rod 4, and adjust the measuring target 5 into the measuring view of the total station.

[0042] S3. The measuring beam emitted by the measuring target 5 is aligned with the center of the target of the measuring target 5 to obtain the three-dimensional coordinates of the center of the target.

[0043] S4. The three-dimensional coordinates of the center of the outfitting pipe fitting calculated based on the three-dimensional coordinates of the bull's-eye, the current elongation length of the telescopic measuring rod 4, the thickness of the main board, and the dimensions of the fixed rod 3.

[0044] S5. Judge the actual position deviation according to the three-dimensional coordinates of the center of the outfitting pipe fitting.

[0045] Preferably, scale values are also provided on the surface of the fixed rod 3 of the above-mentioned pipe center transfer tooling, and the diameter of the outfitting pipe fitting can also be calculated according to the scale values shown on the fixed rod 3.

[0046] Preferably, the fixed rod 3 of the above-mentioned pipe center transfer tooling can be set as a telescopic rod, and the above-mentioned pipe center transfer tooling can also be used to detect whether the outfitting pipe fitting is a perfect circle, that is, place the above-mentioned pipe center transfer tooling inside the pipe of the outfitting pipe fitting (before placing it inside the pipe, it is necessary to ensure that the lengths of the four fixed rods 3 are equal), and make the circular section at the end of one of the fixed rods 3 contact the inner wall of the pipe, and observe whether the circular sections at the ends of the other three fixed rods contact the inner wall of the pipe. If the circular sections at the ends of the other three fixed rods all contact the inner wall of the pipe, it means that the outfitting pipe fitting is a perfect circle.

[0047] It should be clear that the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

Claims

1. A method for measuring the center of an outfitting pipe with obstructed sight, characterized in that: The specific steps include: S1, installing a pipe center transfer tool on the pipe end flange of the outfitting pipe fitting (1) whose measuring sight line is blocked; The pipe center transfer tool comprises a main board (2), a fixing rod (3) threadedly fixed on the upper, lower, left and right four sides of the main board (2), and a telescopic measuring rod (4) threadedly fixed on one end face of the main board (2), the four fixing rods (3) are respectively arranged along the radial direction of the outfitting pipe fitting (1), the end of each fixing rod (3) is vertically fixed with a screw rod (6) for fixing in the flange hole of the pipe end flange to fix the pipe center transfer tool to the end of the outfitting pipe fitting (1), the end of the telescopic measuring rod (4) is fixed with a measuring target (5) that can rotate 360 ​​degrees in the vertical direction, the four fixing rods (3) and the telescopic measuring rod (4) are all located at the center of the side of the main board where they are located, and the center of the measuring target (5) is located on the center line of the telescopic measuring rod (4); S2, keeping the original measuring position of the total station unchanged, pulling the telescopic measuring rod (4), and adjusting the measuring target (5) to the measuring angle of the total station; S3, aligning the measuring light beam emitted by the measuring target (5) with the center of the measuring target (5) to obtain the three-dimensional coordinates of the center of the target; S4, the three-dimensional coordinates of the center of the outfitting pipe fittings are calculated based on the three-dimensional coordinates of the bull's eye, the current extension length of the telescopic measuring rod (4), the thickness of the main board, and the size of the fixing rod (3); S5, judging the actual position deviation of the outfitting pipe fitting according to the three-dimensional coordinates of the center of the circle.

2. The method for measuring the center of an outfitting pipe with obstructed sight according to claim 1 is characterized in that: The plate surface of the fixing rod (3) is also provided with scale values, and the diameter of the outfitting pipe fittings can be calculated according to the scale values ​​displayed on the fixing rod (3).

3. The method for measuring the center of an outfitting pipe with obstructed sight according to claim 1 is characterized in that: The end of the fixing rod (3) is arranged to be a circular section.

4. The method for measuring the center of an outfitting pipe with obstructed sight line according to claim 1 is characterized in that: The measuring target (5) comprises a target frame (51) fixed to the end of a telescopic measuring rod (4), a target axis (52) vertically arranged in the target frame (51), and a target (53) sleeved on the target axis (52); the target surface of the target (53) is in a vertical state, and the target (53) can rotate 360 ​​degrees in the vertical direction around the target axis (52).

5. A device for measuring the center of an outfitting pipe with obstructed sight, characterized in that: It comprises a main board (2), a fixing rod (3) threadedly fixed on the upper, lower, left and right four sides of the main board (2), and a telescopic measuring rod (4) threadedly fixed on one end face of the main board (2), the four fixing rods (3) are respectively arranged along the radial direction of the outfitting pipe fitting (1), the end of each fixing rod (3) is vertically fixed with a screw rod (6) for fixing in the flange hole of the pipe end flange to fix the pipe center transfer tooling on the end of the outfitting pipe fitting (1), the end of the telescopic measuring rod (4) is fixed with a measuring target (5) that can rotate 360 ​​degrees in the vertical direction, the four fixing rods (3) and the telescopic measuring rod (4) are all located at the center of the side of the main board where they are located, and the center of the measuring target (5) is located on the center line of the telescopic measuring rod (4); The measuring target (5) comprises a target frame (51) fixed to the end of a telescopic measuring rod (4), a target axis (52) vertically arranged in the target frame (51), and a target (53) sleeved on the target axis (52); the target surface of the target (53) is in a vertical state, and the target (53) can rotate 360 ​​degrees in the vertical direction around the target axis (52).

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