A tool for measuring the swing distance of a tilt test
By designing a fixture that includes a pendulum, guide tube, and test chamber, and utilizing the cross-reading of the horizontal pointer and scale, as well as the effect of liquid damping, the problem of inaccurate measurement of the swing distance in the tilt test of the floating platform was solved, thus improving the measurement accuracy and stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN BRANCH CHINA NAT OFFSHORE OIL CORP
- Filing Date
- 2025-06-11
- Publication Date
- 2026-06-09
AI Technical Summary
In existing technologies, the pendulum swing distance in tilt tests of floating platforms is often measured directly based on the pendulum line offset distance, which leads to inaccurate measurements and errors in the calculation of the center of gravity height and position.
A fixture for measuring the swing distance in an inclined test is designed, including a pendulum, a guide tube, and a test chamber. The swing distance is read by the overlap of a horizontal pointer and a scale, and the measurement stability is ensured by the damping effect of the test liquid.
It enables precise reading of the swing distance, reduces measurement errors, improves the measurement accuracy of the floating platform tilt test, and provides reliable data for subsequent center of gravity height calculation.
Smart Images
Figure CN224340950U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of marine platforms, and in particular relates to a tooling for measuring the swing distance of an inclined test. Background Technology
[0002] During the design phase of a floating platform, the weight and center of gravity are typically calculated using a distribution calculation method. However, after construction, the actual weight often deviates from the center position. Therefore, a tilting test is necessary after construction. The tilting test is a crucial step before delivery. It involves moving a heavy object to tilt the platform, measuring the pendulum's swing distance, and then calculating the center of gravity height based on the resultant moment calculation model, after deducting excess weight and adding any remaining weight. While the pendulum method is commonly used in tilting tests, the swing distance is often directly measured from the pendulum's offset, which can lead to inaccurate measurements and errors in calculating the platform's actual center of gravity height and position.
[0003] Therefore, there is an urgent need to design a fixture for measuring the swing distance of an inclined test to solve the problems mentioned above. Utility Model Content
[0004] To address the technical problem mentioned in the background section that existing testing methods often rely directly on the offset distance of the cycloid, which can easily lead to inaccurate oscillation distance measurements, a fixture for measuring the oscillation distance in tilt tests is provided.
[0005] To achieve the above objectives, the specific technical solution of the tooling for measuring the swing distance in an inclined test according to this utility model is as follows:
[0006] A fixture for measuring the swing distance of an inclined test includes a pendulum and a guide tube. The pendulum and the guide tube are connected by a first pendulum line. A horizontal pointer is provided on the guide tube, and the direction of the horizontal pointer is perpendicular to the central axis of the guide tube.
[0007] The fixture also includes a test chamber containing a test liquid. The top cover has a guide port with a scale on the edge. The pendulum can enter the test chamber through the guide port until it is completely submerged in the test liquid. At this point, the horizontal pointer and the scale overlap and intersect. When the test chamber is tilted, the horizontal pointer and the scale can read the swing distance.
[0008] Furthermore, the test chamber includes a pair of oil tank covers, which are "concave" shaped plates. The two oil tank covers are double-opening and spliced together to form a guide opening.
[0009] Furthermore, the bottom of the oil tank cover has a sliding groove, through which the oil tank cover is installed on the test chamber.
[0010] Furthermore, the oil tank cover is transparent, and the guide opening is located at the center of the test chamber.
[0011] Furthermore, the guide opening is rectangular in shape, and a scale is marked on the side of the rectangle to facilitate reading the distance the pendulum swings.
[0012] Furthermore, the guide tube and the pendulum are vertically connected, and the design center point is exactly at the center of the oil tank cover during the test. When the pendulum is completely immersed in the test liquid, the bottom of the guide tube is not immersed in the test liquid.
[0013] Furthermore, the horizontal pointer is welded to the middle position of the guide tube, and its direction points to the scale located on the guide opening.
[0014] Furthermore, sealing plates are provided at both ends of the guide tube, and the two ends of the guide tube are sealed by the sealing plates.
[0015] Furthermore, the sealing plate is provided with lifting lugs, one end of the guide tube is connected to the first cycloid through the lifting lugs, and the other end is connected to the second cycloid through the lifting lugs.
[0016] Furthermore, the first and second cycloids lie in the same vertical plane.
[0017] The fixture for measuring the swing distance in the tilt test of this utility model has the following advantages: By setting the horizontal pointer and the scale to overlap and cross, the fixture can accurately read the swing distance, which solves the problem of inaccurate measurement based on the offset distance of the pendulum in the traditional method; The combination structure of the pendulum, guide tube and test box is simple but functional, and can effectively complete the tilt test measurement task; The pendulum is completely immersed in the test liquid, and the damping effect of the liquid makes the measurement process more stable and reduces shaking interference. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the tooling used for measuring the tilt test swing distance of this utility model during testing.
[0019] Figure 2 This is a schematic diagram of the structure of the test chamber of this utility model;
[0020] Figure 3 This is a schematic diagram of the structure of the pendulum of this utility model;
[0021] Figure 4 This is a schematic diagram of the guide tube of this utility model.
[0022] Explanation of markings in the diagram:
[0023] 1. First cycloid; 2. Pendulum; 3. Lifting lug; 4. Guide tube; 5. Sealing plate; 6. Horizontal pointer; 7. Second cycloid; 8. Test chamber; 9. Slide groove; 10. Oil tank cover plate; 11. Guide port; 12. Scale; 13. Test liquid. Detailed Implementation
[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0025] Those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of this invention and form different embodiments. For example, in the claims, any of the claimed embodiments can be used in any combination.
[0026] The following is a reference to the appendix. Figure 1 To be continued Figure 4 This invention describes a tooling for measuring the swing distance in an inclined test.
[0027] This embodiment provides a fixture for measuring the swing distance in an inclined test. Figure 1 This is a schematic diagram of the tooling used for measuring the tilting test swing distance of this utility model during testing; as shown. Figure 1 As shown, the fixture includes a pendulum 2 and a guide tube 4, which are connected by a first cycloid 1. A horizontal pointer 6 is provided on the guide tube 4, and the direction of the horizontal pointer 6 is perpendicular to the central axis of the guide tube 4. The fixture also includes a test chamber 8, which contains a test liquid. The top cover is provided with a guide port 11, and a scale 12 is provided on the edge of the guide port 11. The pendulum 2 can enter the interior of the test chamber 8 through the guide port 11 until it is completely submerged in the test liquid. At this time, the horizontal pointer 6 and the scale 12 overlap and intersect. When the test chamber 8 is tilted, the horizontal pointer 6 and the scale 12 can read the swing distance.
[0028] The fixture for measuring the swing distance in the tilt test can accurately read the swing distance by setting the horizontal pointer 6 and the scale 12 to overlap and cross, which solves the problem of inaccurate measurement based on the offset distance of the pendulum in the traditional method. The combination structure of the pendulum 2, the guide tube 4 and the test box 8 is simple but functional, and can effectively complete the tilt test measurement task. The pendulum 2 is completely immersed in the test liquid, and the damping effect of the liquid makes the measurement process more stable and reduces shaking interference.
[0029] Figure 2 This is a schematic diagram of the structure of the test chamber of this utility model; Figure 3 This is a schematic diagram of the pendulum structure of this utility model.
[0030] Furthermore, such as Figures 1-3 As shown, the test chamber 8 includes a pair of oil tank cover plates 10. The oil tank cover plates 10 have a concave plate structure. The two oil tank cover plates 10 are double-opening and spliced together to form a guide opening 11. The design of the double-opening and spliced concave oil tank cover plates 10 makes it easy to adjust the size of the guide opening 11 to accommodate pendulums 2 of different sizes.
[0031] Specifically, such as Figures 1-3 As shown, the oil tank cover 10 has a sliding groove 9 at its bottom, and the oil tank cover 10 is installed on the test chamber 8 through the sliding groove 9. The sliding groove 9 at the bottom of the oil tank cover 10 facilitates installation and disassembly, improving the assembly efficiency and maintenance convenience of the tooling.
[0032] Furthermore, the oil tank cover 10 is transparent, and the guide opening 11 is located at the center of the test chamber 8. The transparent oil tank cover 10 design allows operators to directly observe the internal measurement process.
[0033] Furthermore, the guide opening 11 is rectangular in shape, and a scale 12 is marked on the side of the rectangle to facilitate reading the swing distance of the pendulum 2. The scale 12 is set on the edge of the rectangular guide opening 11 to facilitate direct reading of the swing distance value.
[0034] Furthermore, Figure 4 This is a schematic diagram of the guide tube of this utility model, as shown below. Figure 4 As shown, the guide tube 4 is vertically connected to the cycloid. During the test, the design center point is precisely located at the center of the oil tank cover plate 10, and when the pendulum 2 is completely immersed in the test liquid, the bottom of the guide tube 4 is not immersed in the test liquid. The vertical connection between the guide tube 4 and the cycloid ensures that the center point is accurately positioned at the center of the oil tank cover plate 10; the guide port 11 is located at the center of the test chamber 8, ensuring the accuracy of the measurement reference point and reducing measurement errors.
[0035] Furthermore, the horizontal pointer 6 is welded to the middle position of the guide tube 4, and its direction points to the scale 12 located on the guide opening 11. The horizontal pointer 6 being welded to the middle position of the guide tube 4 ensures that the pointing accuracy corresponds precisely to the scale 12.
[0036] Furthermore, sealing plates 5 are provided at both ends of the guide tube 4, and the two ends of the guide tube 4 are sealed by the sealing plates 5. The sealing plates 5 at both ends of the guide tube 4 prevent the interference of the test liquid from affecting the measurement.
[0037] Furthermore, such as Figure 4 As shown, the sealing plate 5 is equipped with a lifting lug 3. One end of the guide tube 4 is connected to the first cycloid 1 through the lifting lug 3, and the other end is connected to the second cycloid 7 through the lifting lug 3. The cycloids are connected through the lifting lug 3 to ensure a firm connection and smooth swing.
[0038] Specifically, the first cycloid 1 and the second cycloid 7 are located in the same vertical plane.
[0039] This embodiment also provides a floating platform that uses the aforementioned fixture for measuring the swing distance in tilt tests. Applying this fixture to a floating platform can significantly improve the measurement accuracy of the platform's tilt test; accurate swing distance measurement provides a reliable data basis for subsequent calculation of the floating platform's center of gravity height; this fixture design is suitable for tilt tests of various types of floating platforms and has broad engineering application value.
[0040] Preferably, the structure of the guide tube 4 can be made in different specifications according to the needs of tilt tests for different types of floating platforms.
[0041] When conducting tests using tooling on a floating platform, the following procedures are typically involved:
[0042] Step 1: Connect the bottom of the first pendulum 1 to the lug 3 at the top of the pendulum 2, connect the top of the first pendulum 1 to the lug 3 at the bottom of the guide tube 4, and weld the lug 3 of the guide tube 4 to the sealing plate 5 to achieve the connection of the first pendulum 1, the pendulum 2, and the guide tube 4. Furthermore, a horizontal pointer 6 is welded to the vertical center of the guide tube 4.
[0043] Step 2: Connect the bottom of the second pendulum 7 to the lug 3 at the top of the guide tube 4, and connect the top of the second pendulum 7 to the lug 3 at the installation position of the floating platform. Wrap the second pendulum 7 around the lug 3 several times so that the bottom of the pendulum 2 is a certain height away from the test box 8.
[0044] Step 3: Conduct a leak test on the test chamber 8. After meeting the sealing requirements, place it in the designed position on the floating platform and assemble two concave oil tank cover plates 10 with sliding grooves 9 installed on the bottom to form a guide opening 11. The guide opening 11 formed by splicing is marked with a scale 12 on its side length, which can be used with the horizontal pointer 6 to read the tilt angle. While slowly lowering the pendulum 2, adjust the position of the test chamber 8 and the oil tank cover plate 10 until the guide tube 4 is exactly in the center of the oil tank cover plate 10. Then, slowly lift the second pendulum 7, the guide tube 4, the first pendulum 1, and the pendulum 2 to a certain height above the test chamber 8, and then remove the two concave oil tank cover plates 10.
[0045] Step 4: After filling the test liquid in the test chamber 8 to the designed height, align the two concave oil tank cover plates 10 together, and then slowly lower the second cycloid 7, guide tube 4, first cycloid 1, and pendulum 2 until the horizontal pointer 6 of the guide tube 4 is slightly higher than the oil tank cover plate 10. At this point, the pendulum 2 is completely submerged in the test liquid in the test chamber 8, while the bottom of the guide tube 4 does not contact the test liquid.
[0046] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. A tool for measuring the swing distance of a tilt test, characterized in that, It includes a pendulum and a guide tube, which are connected by a first cycloid. A horizontal pointer is provided on the guide tube, and the direction of the horizontal pointer is perpendicular to the central axis of the guide tube. The fixture also includes a test chamber containing a test liquid. The top cover has a guide port with a scale on the edge. The pendulum can enter the test chamber through the guide port until it is completely submerged in the test liquid. At this point, the horizontal pointer and the scale overlap and intersect. When the test chamber is tilted, the horizontal pointer and the scale can read the swing distance.
2. The tooling for measuring the swing distance of a tilt test of claim 1, wherein, The test chamber includes a pair of oil tank covers. The oil tank covers have a concave plate structure. The two oil tank covers are double-opening and spliced together to form a guide opening.
3. The tooling for measuring the swing distance of a tilt test of claim 2, wherein, The oil tank cover has a sliding groove at the bottom, and the oil tank cover is installed on the test chamber through the sliding groove.
4. A tool for measuring the swing distance of a tilt test according to any one of claims 2 or 3, characterized in that The oil tank cover is transparent, and the guide opening is located in the center of the test chamber.
5. The tooling for measuring the swing distance of a tilt test of claim 4 wherein, The guide opening is rectangular in shape, and a scale is marked on the side of the rectangle to make it easy to read the distance the pendulum swings.
6. The tooling for measuring the swing distance of a tilt test of claim 4 wherein, The guide tube is vertically connected to the first pendulum. During the test, the design center point is exactly at the center of the oil tank cover plate, and when the pendulum is completely immersed in the test liquid, the bottom of the guide tube is not immersed in the test liquid.
7. The tooling for measuring the swing distance of a tilt test of claim 1 wherein, The horizontal pointer is welded to the middle position of the guide tube, and its direction is towards the scale located on the guide opening.
8. The tooling for measuring the swing distance of a tilt test of claim 1, wherein, The guide tube is equipped with sealing plates at both ends, and the two ends of the guide tube are sealed by the sealing plates.
9. The tooling for measuring the swing distance of a tilt test of claim 8, wherein, The sealing plate is equipped with lifting lugs. One end of the guide tube is connected to the first cycloid through the lifting lugs, and the other end is connected to the second cycloid through the lifting lugs.
10. The tooling for measuring the swing distance of a tilt test of claim 9, wherein, The first and second cycloids lie in the same vertical plane.