Retractable scale steel pipe for ships

Abstract

This invention addresses the shortcomings of traditional steel pipes used in ship inclination tests by proposing a retractable, graduated steel pipe for marine applications. It comprises a main steel pipe, double-telescopic inner pipes, a pin, a folding steel pipe, and a wire winding device. The main steel pipe is marked with graduations and has a mounting base at the bottom; the telescopic inner pipe slides within the main steel pipe and has a storage groove; the folding steel pipe is connected by a hinge and houses the wire winding device. During use, the double-telescopic structure allows for flexible length adjustment, and the graduations facilitate accurate measurement of the cycloidal line length, ensuring test safety. After the test, the cycloidal line automatically retracts under spring action, allowing for reuse and reducing waste. This steel pipe effectively solves the drawbacks of traditional steel pipes, significantly improves the efficiency of ship inclination tests, reduces costs, and possesses good practicality and promotional value.

Description

Technical Field

[0001] This utility model belongs to the technical field of ship testing equipment, specifically relating to a ship-use retractable steel pipe with scale. It is mainly used in ship inclination tests to suspend a cycloid and accurately measure the length of the cycloid, assisting in obtaining the actual weight and center of gravity height of the ship after completion. It is an important innovative auxiliary tool in ship manufacturing and testing. Background Technology

[0002] Ship inclining tests are a crucial part of the shipbuilding process. By measuring the ship's heel, the actual weight and center of gravity of the completed vessel are accurately determined. The accuracy of the test data directly affects the safety and stability of the ship's navigation. In traditional ship inclining tests, the steel pipe used to suspend the cycloidal line is usually a fixed-length ordinary steel pipe. This traditional steel pipe has revealed many drawbacks in practical use, severely restricting the efficiency and quality of the tests.

[0003] First, fixed-length steel pipes cannot meet the diverse needs of different ships and testing scenarios. For large ships, the pipe length may be insufficient to meet testing requirements; while for small ships, excessively long pipes waste space and are extremely inconvenient to transport. Furthermore, because the length is not adjustable, a suitable pipe length must be selected based on the ship's condition before each test, increasing the complexity of test preparation and potentially affecting test progress due to improper pipe selection. Second, the measurement process for cycloidal length has significant flaws. Traditionally, operators need to use additional measuring tools, such as tape measures, to manually measure the steel pipe. At ship inclining test sites, this measurement often requires operators to work at heights or in confined, complex environments, which is not only difficult and inefficient but also poses a high safety risk; a slight mishap could result in injury from a fall. Moreover, manual measurement is greatly affected by the accuracy of the measuring tools and the operator's subjective factors, making it difficult to guarantee the accuracy and reliability of the measurement data, thus affecting the scientific validity and authority of the ship inclining test results.

[0004] Furthermore, cycloids are typically discarded after testing. This is because they may be worn or contaminated during the test, making them difficult to reuse. Frequent replacement of cycloids not only results in a significant waste of resources and increases testing costs, but also contradicts current green environmental protection and sustainable development principles. As the shipbuilding industry increasingly demands higher testing efficiency, accuracy, and cost control, traditional steel pipes used for suspending cycloids can no longer meet the industry's needs. There is an urgent need for a new type of marine steel pipe device that allows for flexible length adjustment, facilitates precise measurement, ensures operator safety, and conserves resources. Utility Model Content

[0005] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0006] This utility model aims to provide a retractable steel pipe with graduations for ships. Through innovative design, it effectively solves the problems of traditional steel pipes in ship inclination tests, such as non-adjustable length, inconvenient measurement, high safety risks, and wasted cycloidal lines. It improves the efficiency, accuracy, and safety of ship inclination tests, reduces test costs, meets the growing technical needs of the shipbuilding industry, and provides a more efficient and reliable auxiliary tool for ship inclination tests.

[0007] To achieve the above objectives, this utility model provides the following technical solution: A marine retractable steel pipe with scale, comprising a main steel pipe, two telescopic inner pipes, two pins, a folding steel pipe, and a wire winding device.

[0008] The main steel pipe is a hollow, long tubular structure with precisely marked graduations along its length on its outer surface. The accuracy of these graduations meets the high-precision requirements for measuring the cycloid length during ship inclination tests. A mounting base is located at the bottom of the main steel pipe, used to connect with the relevant fixing devices for ship inclination tests, ensuring the stability of the steel pipe during the test. A positioning hole is opened on the outer side of the top of the main steel pipe, while the other end is a closed end. The closed end effectively prevents dust, debris, and other contaminants from entering the main steel pipe, protecting its internal structure.

[0009] Both telescopic inner tubes are hollow tubular structures with an outer diameter smaller than the inner diameter of the main steel pipe, allowing for tight and smooth telescopic sliding within the main steel pipe. Each telescopic inner tube has a storage groove on one side, used to store folded steel pipes and other components when the inner tube is fully retracted into the main steel pipe, further reducing the overall space occupied by the steel pipe. Pin holes are located at both ends of the telescopic inner tube wall, their positions matching the positioning holes on the outer top of the main steel pipe to achieve fixed connections between the telescopic inner tube and the main steel pipe at different lengths.

[0010] The pin is used to insert into the pin hole of the telescopic inner tube and the positioning hole of the main steel tube. When the length of the steel tube needs to be adjusted, first pull out the pin, then extend or retract the telescopic inner tube inside the main steel tube to the appropriate position, aligning the pin hole on the telescopic inner tube with the positioning hole of the main steel tube. Then insert the pin into the aligned hole to firmly fix the telescopic inner tube to the main steel tube. By adjusting the extension and retraction of the two telescopic inner tubes, a wider range of length changes of the steel tube can be achieved to meet the needs of different test scenarios. The folding steel tube is connected to one end of the telescopic inner tube by a hinge. The hinge design allows the folding steel tube to rotate around it, realizing the folding and unfolding functions. The folding steel tube has a storage cavity inside, which is used to store the wire winding device and the cycloidal line. When the cycloidal line is not needed, the folding steel tube can be rotated around the hinge to a position parallel to the main steel tube, reducing the overall volume of the steel tube and facilitating handling and storage. When the cycloidal line is needed, the folding steel tube is unfolded so that it is at a certain angle to the main steel tube, making it easy to pull out and use the cycloidal line.

[0011] The wire winding device is installed inside the storage cavity of the folded steel tube and includes a spring, a winding shaft, and a wire outlet. The winding shaft is rotatably mounted inside the storage cavity, with one end of the cycloid fixedly wound around it and the other end extending from the wire outlet. The spring is sleeved on the winding shaft, with one end connected to the shaft and the other end fixedly connected to the inner wall of the storage cavity. When the cycloid is pulled out from the wire outlet for use, the spring is stretched, storing elastic potential energy; when the cycloid is released after use, the winding shaft automatically rotates under the spring force, winding the cycloid back onto the shaft, achieving automatic cycloid retraction and preventing the cycloid from scattering randomly at the test site, thus improving the convenience and safety of the test operation. Simultaneously, a cone-shaped tip is provided at the end of the cycloid; the cone design facilitates the suspension and positioning of the cycloid, improving the accuracy of the test.

[0012] In summary, this application includes the following beneficial technical effects:

[0013] 1. Flexible Adjustment, Adaptable to Diverse Scenarios: This invention utilizes the telescopic sliding of two inner telescopic tubes within the main steel pipe, combined with the fixing effect of pins, to achieve a wide range of flexible adjustments to the steel pipe length. Compared to traditional steel pipes with a single telescopic structure, it offers a broader adjustment range. Whether in the spacious test area of ​​a large ship or the confined test space of a small ship, the steel pipe can be quickly and accurately adjusted to the appropriate length, meeting the diverse needs of different ships and test scenarios. After the test, the telescopic inner tubes can be retracted into the main steel pipe, and the folded steel pipe can be folded around the hinge and stored in the storage slot of the telescopic inner tube, greatly reducing the overall volume of the steel pipe, facilitating handling and storage, effectively saving storage space, and reducing the management cost and difficulty of the test equipment.

[0014] 2. Precise Measurement, Ensuring Test Safety: The precisely marked graduations on the outer surface of the steel pipe provide an intuitive and accurate reference for measuring the cycloid length. Operators do not need other complex measuring tools; they can quickly and accurately obtain the cycloid length simply by observing the position of the cycloid suspension point on the graduations, simplifying the measurement process and improving efficiency. Simultaneously, it avoids the need for operators to use additional measuring tools at heights or in complex environments, reducing safety risks and ensuring operator safety. Furthermore, the precise graduations effectively reduce measurement errors, improving the accuracy and reliability of ship inclining test data, and providing more scientific and accurate data support for ship design, manufacturing, and performance evaluation.

[0015] 3. Automatic Retraction, Saving Test Costs: The ingenious design of the spring and winding shaft in the line retraction device enables automatic retraction of the cycloidal line. During ship inclining tests, after the cycloidal line is used, simply release it, and under the spring force, the line will automatically wind back onto the winding shaft and be stored in the storage cavity of the folded steel tube. This automatic retraction function not only facilitates the handling and use of the cycloidal line, improving the convenience of test operations, but also avoids damage, loss, and contamination caused by haphazard placement of the cycloidal line at the test site. It allows for the reuse of the cycloidal line, reducing waste and lowering test costs, aligning with the concepts of green environmental protection and sustainable development. Simultaneously, the tapered design at the end of the cycloidal line further improves the accuracy of cycloidal line suspension and positioning, ensuring the smooth conduct of ship inclining tests. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a schematic diagram illustrating the storage mechanism of this utility model;

[0019] Figure 3 This is a schematic diagram of the internal structure of the folded steel pipe of this utility model;

[0020] Figure 4 This is an enlarged schematic diagram of the cycloidal storage mechanism of this utility model.

[0021] In the diagram: 1. Main steel pipe; 101. Scale line; 102. Mounting base; 103. Positioning hole; 2. Telescopic inner pipe; 201. Storage groove; 202. Pin hole; 3. Pin bolt; 4. Folding steel pipe; 401. Hinge; 402. Storage cavity; 5. Wire winding device; 501. Spring; 502. Winding shaft; 503. Wire outlet; 6. Cycloidal wire; 601. Cone head. Detailed Implementation

[0022] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0023] The following is in conjunction with the appendix Figure 1 —4. This application will be described in further detail.

[0024] The marine retractable graduated steel pipe of this utility model includes a main steel pipe 1, two telescopic inner pipes 2, two pins 3, a folding steel pipe 4, and a wire winding device 5.

[0025] First, prepare the main steel pipe 1. Secure the mounting base 102 to the bottom of the main steel pipe 1 using welding or bolts, ensuring the mounting base 102 is firmly installed and can reliably connect to the fixing device for the ship's inclination test. Check if the markings 101 on the outer surface of the main steel pipe 1 are clear and accurate. If there are any blurry or incorrect markings, correct them promptly. At the same time, confirm that the position and size of the positioning hole 103 on the outer side of the top of the main steel pipe 1 are accurate.

[0026] Insert the two telescopic inner tubes 2 into the main steel pipe 1 respectively, ensuring that the telescopic inner tubes 2 can slide smoothly within the main steel pipe 1. Adjust the position of the telescopic inner tubes 2 so that the pin hole 202 on the telescopic inner tube 2 is initially aligned with the positioning hole 103 on the outer side of the top of the main steel pipe 1, thus determining the relative positional relationship between the telescopic inner tubes 2 and the main steel pipe 1.

[0027] Insert the bolts 3 into the bolt holes 202 of the two telescopic inner tubes 2 and the corresponding positioning holes 103 of the main steel pipe 1, respectively, to fix the telescopic inner tubes 2 and the main steel pipe 1 in place. Check whether the bolts 3 are installed firmly to ensure that the telescopic inner tubes 2 will not slide freely inside the main steel pipe 1.

[0028] Fix one end of hinge 401 to one end of the uppermost telescopic inner tube 2, and connect one end of the folded steel tube 4 to the telescopic inner tube 2 via hinge 401, ensuring that the folded steel tube 4 can rotate flexibly around hinge 401. Check whether the rotation of the folded steel tube 4 is smooth; if there is any jamming, adjust it in time.

[0029] A winding shaft 502 is installed inside the storage cavity 402 of the folded steel pipe 4, ensuring that the winding shaft 502 can rotate freely within the storage cavity 402. A spring 501 is fitted onto the winding shaft 502, with one end of the spring 501 fixedly connected to the winding shaft 502 and the other end fixedly connected to the inner wall of the storage cavity 402. One end of the cycloidal line 6 is fixedly wound around the winding shaft 502, and then the other end of the cycloidal line 6 is passed through the outlet 503, ensuring that the cycloidal line 6 can be smoothly pulled out and retracted from the outlet 503. Finally, a cone 601 is installed at the end of the cycloidal line 6 to limit the storage position of the cycloidal line 6, making it convenient for workers to pull it out.

[0030] Working principle: Before conducting the ship inclining test, the length of the steel pipe is adjusted according to the actual space and test requirements at the test site. First, the two pins 3 are pulled out from the pin holes 202 of the two telescopic inner tubes 2 and the positioning holes 103 of the main steel pipe 1, respectively. Then, the two telescopic inner tubes 2 are simultaneously or separately extended and retracted within the main steel pipe 1 to a suitable position, so that the appropriate pin holes 202 on the telescopic inner tubes 2 are aligned with the positioning holes 103 of the main steel pipe 1. The pins 3 are then inserted into the aligned holes to fix the two telescopic inner tubes 2 to the main steel pipe 1. Next, the folded steel pipe 4 is unfolded around the hinge 401 to form a suitable angle with the main steel pipe 1, so as to facilitate the pulling out and use of the cycloidal line 6.

[0031] Test Measurement Phase: The cycloid 6 is pulled out from the outlet 503 and suspended at the required position for the ship inclining test via the cone 601 at its end. The operator observes the scale line 101 on the outer surface of the main steel pipe 1 and reads the distance from the suspension point of the cycloid 6 to the measurement reference point, thus obtaining the length of the cycloid 6, providing accurate data support for the ship inclining test. If the length of the cycloid 6 needs to be adjusted during the test, the positions of the two telescopic inner tubes 2 can be readjusted, and after being fixed by the pins 3, the length of the cycloid 6 can be measured again.

[0032] End of Test Phase: After the ship tilting test is completed, the cycloidal line 6 is released. Under the elastic force of the spring 501, the cycloidal line 6 automatically winds back onto the winding shaft 502 and is stored in the storage cavity 402 of the folded steel tube 4. The folded steel tube 4 is folded around the hinge 401 to a position parallel to the main steel tube 1. Then, the two pins 3 are pulled out, and the two telescopic inner tubes 2 are retracted into the main steel tube 1, so that the storage groove 201 of the telescopic inner tube 2 stores the folded steel tube 4. Finally, the entire steel tube is cleaned, and all parts are inspected for damage. If any damage is found, it is repaired or replaced in a timely manner. The steel tube is then stored in the designated location for use in the next test.

[0033] In summary, this utility model, through its unique structural design and innovative functional implementation, effectively solves many problems existing in traditional marine steel pipes during ship tilting tests. It has significant practicality and innovation, and has broad application prospects and promotional value.

[0034] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A telescopic banded scale steel pipe for marine use, characterized by, It includes a main steel pipe (1), two telescopic inner pipes (2), two pins (3), a folded steel pipe (4), and a wire winding device (5); the main steel pipe (1) is a hollow long tubular structure with scale lines (101) marked on the outer surface along the length direction, and a positioning hole (103) is opened on the outer side of the top end of the main steel pipe (1), and the other end is a closed end; a storage groove (201) is provided on one side of the telescopic inner pipe (2), and pin holes (202) are provided on both ends of the pipe wall; The pin (3) is used to insert into the pin hole (202) of the telescopic inner tube (2) and the positioning hole (103) of the main steel pipe (1); the folded steel pipe (4) is connected to one end of the telescopic inner tube (2) through a hinge (401); the wire winding device (5) includes a spring (501), a winding shaft (502) and a wire outlet (503); one end of the cycloidal wire (6) is fixedly wound on the winding shaft (502), and the other end extends out from the wire outlet (503).

2. A telescopic banded steel pipe for marine use according to claim 1, characterized in that: The two telescopic inner tubes (2) are hollow and their outer diameter is smaller than that of the main steel pipe (1), allowing them to slide telescopically within the main steel pipe (1). The accuracy of the scale line (101) meets the high-precision requirements for cycloidal length measurement in ship tilting tests.

3. A telescoping banded steel pipe for marine use according to claim 1, characterized in that: When the telescopic inner tube (2) is fully retracted into the main steel tube (1), the folded steel tube (4) can be stored in the storage groove (201) of the telescopic inner tube (2).

4. The telescoping banded steel pipe according to claim 1, wherein: The end of the cycloid (6) is provided with a cone (601).

5. The telescoping banded steel pipe according to claim 1, wherein: The folding steel pipe (4) can be rotated and folded around the hinge (401) to a position parallel to the main steel pipe (1), and the bottom of the main steel pipe (1) is provided with a mounting base (102).

6. The telescoping banded steel pipe according to claim 1, wherein: The folded steel pipe (4) has a storage cavity (402) inside; the wire winding device (5) is installed in the storage cavity (402) of the folded steel pipe (4).

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