Lateral pressure resistance testing device for marine cable
By designing uniform compression in all four directions of the marine cable, combined with the drive of servo cylinders and hydraulic cylinders, the problem of inaccurate data from traditional testing devices is solved, achieving accuracy and stability in the lateral pressure resistance test of marine cables.
Patent Information
- Application Number
- CN202423081781.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-13
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-12-13
AI Technical Summary
Traditional marine cable lateral pressure resistance testing devices ignore the deformation factors of marine cables during the compression process, resulting in inaccurate test data and potentially making it unsafe to use marine cables under high pressure environments.
The design incorporates four test pressure heads evenly distributed in four directions to compress the submarine cable. Combined with the drive of servo cylinders and hydraulic cylinders, V-grooves and support rollers ensure the centering and stability of the submarine cable, enabling omnidirectional testing.
It improves the accuracy and stability of lateral pressure resistance testing for marine cables, enables more precise acquisition of test data, is applicable to marine cables of different diameters, and simplifies the testing process.
Smart Images
Figure CN223581628U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of marine cable testing device, specifically is a kind of marine cable lateral pressure testing device. BACKGROUND
[0002] The lateral pressure strength of marine cable is an important parameter of marine cable laying, which is related to the maximum depth of marine cable laying and the damage resistance. The traditional marine cable lateral pressure testing device is tested by relative bidirectional extrusion. This testing method is relatively simple, but it ignores the deformation factor of the extrusion process of the marine cable. In the two directions perpendicular to the extrusion direction, deformation is easy to occur, which can share the extrusion effect. Therefore, when testing the limit value of the lateral pressure of the marine cable, the lateral force test data will be greater than the actual data, which will cause misjudgment of the use conditions of the marine cable. When the marine cable is laid in a high-pressure water environment, the wrong parameters of lateral pressure can easily put the marine cable in a high-pressure environment that cannot be safely used, which is not conducive to the long-term effective use of the marine cable, especially when the marine cable is an ultra-high voltage direct current marine cable, the safety factor of use is high. Slight deformation of the ultra-high voltage direct current marine cable can easily lead to severe use fluctuations, which can cause potential problems in the use of the ultra-high voltage direct current marine cable. SUMMARY
[0003] The technical problem to be solved by the utility model is to provide a marine cable lateral pressure testing device that can more accurately test the lateral force capacity of the marine cable.
[0004] The utility model discloses the technical scheme adopted to solve the above problem is: a kind of marine cable lateral pressure testing device, including four for testing marine cable test pressure head and a for testing marine cable test station, four The test pressure head is respectively the upper test pressure head arranged in the upper of test station, the lower test pressure head arranged in the lower of test station, the left test pressure head arranged in the left of test station and the right test pressure head arranged in the right of test station, four test pressure heads are used to extrude the marine cable on test station in four radial directions to test the lateral pressure capacity of marine cable, lower test pressure head drive connection is established on pressure servo cylinder, left test pressure head or right test pressure head drive connection is established on pressure servo cylinder, upper test pressure head drive connection is established on test hydraulic cylinder, another test pressure head in left test pressure head and right test pressure head drive connection is established on test hydraulic cylinder.
[0005] Compared with existing technologies, the advantages of this invention are as follows: Firstly, the design of evenly distributing four test pressure heads in four directions on the marine cable allows for comprehensive lateral compression, significantly reducing the cable's deformable space. This improves the accuracy of the lateral compression resistance test data. Furthermore, the test data obtained by comparing the pressure between the upper and lower test pressure heads with those obtained by comparing the pressure between the left and right test pressure heads yields more precise test data. Secondly, the design of connecting the lower test pressure head to a pressure servo cylinder, and the left or right test pressure head to the same cylinder, allows for adjustment of the test position to ensure the cable's centering after compression. The design, where the upper test head is driven and connected to the test hydraulic cylinder, and the other test head (left or right) is also driven and connected to the test hydraulic cylinder, allows for controllable pressure compression of the marine cable. During the compression process, due to the reciprocity of forces, when the upper and lower test heads are compressing each other, or when the left and right test heads are compressing each other, only one of them needs to apply compressive force, while the other only needs to remain stationary to generate a reaction force of the same magnitude in the opposite direction. This eliminates the need for all test heads to be driven and connected to the test hydraulic cylinder, simplifying the testing process and ensuring its stability. If all test heads are driven and connected to the test hydraulic cylinder, and the compressive force at one end is too small, it will cause the marine cable to shift, and the marine cable will lose its centering during the test.
[0006] As an improvement of this utility model, the extrusion end of the test head is provided with a V-groove. When the marine cable is tested, the marine cable is embedded in the V-groove on the corresponding side. Through this improvement, the V-groove can adjust the position of the marine cable when the test head extrudes the marine cable, ensuring the centering of the marine cable on the test head and making the test data more accurate.
[0007] As an improvement of this utility model, the angle of the V-groove is 120°. Through this improvement, the marine cable can be squeezed more stably and is not easy to shift or misalign.
[0008] As an improvement of this utility model, all four test heads are detachably connected to the servo motor or the test hydraulic cylinder, which facilitates the maintenance and replacement of the test heads.
[0009] As an improvement of this utility model, the width of the test indenter is reduced along the direction towards the marine cable. This improvement can prevent interference between two adjacent test indenters during the compression process.
[0010] As an improvement of this utility model, the reduction slope of the width of the test head includes various specifications, which facilitates adaptation to marine cables of different diameters.
[0011] As a kind of improvement of the utility model, one end of the test station is equipped with support frame for supporting marine cable, support roller is equipped on the support frame, and is distributed along the axial direction of marine cable, through the improvement, the support of marine cable is realized, ensure that marine cable is kept horizontally placed when testing, and the design of support roller is conducive to the movement of support frame of marine cable, facilitate the quick testing of marine cable.
[0012] As a kind of improvement of the utility model, the middle section of the support roller is equipped with V-shaped support groove, through the improvement, when marine cable moves on V-shaped support groove, marine cable will be automatically adjusted to the recess of V-shaped support groove, to ensure the centricity and stability of marine cable moving on support roller.
[0013] As a kind of improvement of the utility model, the other end of the test station is equipped with push servo cylinder, the push servo cylinder is used to test the friction of marine cable under the extrusion of test pressure head, through the improvement, in the case of testing the lateral pressure resistance of marine cable, the friction coefficient of marine cable under corresponding pressure can also be tested through the design of push servo cylinder, and the anti-seismic ability of marine cable laid on the ground can be calculated accordingly, that is, the stability of marine cable laid on the ground is ensured, and it is not easy to deviate randomly.
[0014] As a kind of improvement of the utility model, the driving end of the push servo cylinder is drivingly connected with a driving disc, and the end of the driving disc close to the test station is equipped with anti-drop hole, through the improvement, the end of marine cable is inserted into anti-drop hole, to avoid the deformation of marine cable from driving disc when pushing marine cable, so as to affect the accuracy of testing. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 It is the overall structure schematic diagram of the utility model.
[0016] Figure 2 It is the distribution structure schematic diagram of four test pressure heads of the utility model.
[0017] Figure 3 It is the structure schematic diagram of left test pressure head embodiment one of the utility model.
[0018] Figure 4 It is the connection structure schematic diagram of support frame of the utility model.
[0019] Figure 5 It is the connection structure schematic diagram of driving disc and lower test pressure head, right test pressure head of the utility model.
[0020] Figure 6 It is the structure schematic diagram of left test pressure head embodiment two of the utility model.
[0021] Figure 7It is the structure schematic diagram of left test pressure head embodiment three of the utility model.
[0022] Figure 8 It is the structure schematic diagram of left test pressure head embodiment four of the utility model.
[0023] Figure 9 It is the structure schematic diagram of left test pressure head embodiment five of the utility model.
[0024] As shown in the figure: 1, upper test pressure head, 2, lower test pressure head, 3, left test pressure head, 4, right test pressure head, 5, pressure servo cylinder, 6, test hydraulic cylinder, 7, V-shaped groove, 8, support frame, 8.1, support roller, 8.1.1, V-shaped support groove, 9, thrust servo cylinder, 10, driving disc, 10.1, anti-off hole, 11, moving guide rail, 12, directional rod, 13, plate shell. DETAILED DESCRIPTION
[0025] The embodiments of the utility model are further described below in combination with the drawings.
[0026] As Figures 1-2 shown, a kind of marine cable lateral pressure test device, including four for testing marine cable test pressure head and one for testing marine cable test station, four described test pressure head are respectively set in the upper test pressure head 1 of test station, set in the lower test pressure head 2 of test station, set in the left test pressure head 3 of test station and set in the right test pressure head 4 of test station, four test pressure heads are used to the extrusion of marine cable on test station in four radial directions to test the extrusion ability of marine cable, lower test pressure head 2 drive connection is in pressure servo cylinder 5, left test pressure head 3 or right test pressure head 4 drive connection is in pressure servo cylinder 5, upper test pressure head 1 drive connection is in test hydraulic cylinder 6, another test pressure head in left test pressure head 3 and right test pressure head 4 drive connection is in test hydraulic cylinder 6.
[0027] As Figure 3 shown, the extrusion end of the test pressure head is provided with V-shaped groove 7, when marine cable is tested, marine cable is embedded in corresponding side V-shaped groove 7, the angle of V-shaped groove 7 is 120 °. Four described test pressure heads are all detachably connected on servo motor or test hydraulic cylinder 6, the width of the test pressure head reduces along the direction of marine cable.
[0028] As Figure 1 , Figure 4 shown, one end of the test station is provided with support frame 8 for supporting marine cable, a plurality of support rollers 8.1 are arranged on the support frame 8 along the axial direction of marine cable, and a V-shaped support groove 8.1.1 is arranged in the middle section of the support roller 8.1.
[0029] As Figure 1、 Figure 5 As shown in the figure, the other end of the test station is provided with a thrust servo cylinder 9 for testing the friction of the marine cable under the extrusion of the test pressure head, and the driving end of the thrust servo cylinder 9 is drivingly connected with a driving disc 10, and the driving disc 10 is provided with an anti-disengagement hole 10.1 near one end of the test station.
[0030] As shown in the figure, in order to ensure the driving stability of the test pressure head by the pressure servo cylinder 5 and the test hydraulic cylinder 6, the driving end of the pressure servo cylinder 5 and the driving end of the test hydraulic cylinder 6 are movably connected on the moving guide rail 11 in the corresponding direction, and the driving end of the pressure servo cylinder 5 and the driving end of the test hydraulic cylinder 6 are movably connected with the moving guide rail 11 in the corresponding direction by wedge-shaped groove and wedge-shaped block, and the moving guide rail 11 is fixedly connected on the plate shell 13 of the device. Figure 1 、 Figure 5 As shown in the figure, in order to ensure the coaxiality between the driving disc 10 and the plurality of test pressure heads, four directional rods 12 are uniformly arranged on the circumference of the driving disc 10, and the four directional rods 12 are fixedly connected with the four test pressure heads respectively, and the four directional rods 12 are movably connected on the four radial directions of the driving disc 10.
[0031] As shown in the figure, in order to make the marine cable lateral pressure resistance testing device suitable for marine cables with different diameters, and to avoid interference between the test pressure heads, the test pressure heads are designed with a plurality of different embodiment specifications, and the left test pressure head 3 is taken as an example in the figure, and the thickness change slope angles of the test pressure heads are 10°, 15°, 17.5°, 27.5° and 30° respectively. Figure 3 、 Figures 6-9 As shown in the figure, in order to make the marine cable lateral pressure resistance testing device suitable for marine cables with different diameters, and to avoid interference between the test pressure heads, the test pressure heads are designed with a plurality of different embodiment specifications, and the left test pressure head 3 is taken as an example in the figure, and the thickness change slope angles of the test pressure heads are 10°, 15°, 17.5°, 27.5° and 30° respectively.
[0032] Through the design of the marine cable lateral pressure resistance testing device, the limit of the lateral pressure resistance of the marine cable can be more accurately tested, and the friction coefficient of the marine cable can also be tested.
[0033] The above only describes the best embodiment of the present application, but cannot be understood as a limitation on the claims. The present application is not limited to the above embodiments, and the specific structure can be changed. Any change made within the protection scope of the independent claim of the present application is within the protection scope of the present application.
Claims
1. A device for testing the lateral pressure resistance of marine cables, characterized in that: It includes four test heads for testing marine cables and a test station for testing marine cables. The four test heads are an upper test head (1) located above the test station, a lower test head (2) located below the test station, a left test head (3) located to the left of the test station, and a right test head (4) located to the right of the test station. The four test heads are used to compress the marine cable on the test station in four radial directions to test the pressure resistance of the marine cable. The lower test head (2) is driven and connected to a pressure servo cylinder (5). The left test head (3) or the right test head (4) is driven and connected to the pressure servo cylinder (5). The upper test head (1) is driven and connected to a test hydraulic cylinder (6). The other test head in the left test head (3) and the right test head (4) is driven and connected to the test hydraulic cylinder (6).
2. The marine cable lateral pressure resistance testing device according to claim 1, characterized in that: The extrusion end of the test head is provided with a V-groove (7). When the marine cable is tested, the marine cable is embedded in the V-groove (7) on the corresponding side.
3. The marine cable lateral pressure resistance testing device according to claim 2, characterized in that: The angle of the V-groove (7) is 120°.
4. The marine cable lateral pressure resistance testing device according to claim 2, characterized in that: All four test heads are detachably connected to the servo motor or the test hydraulic cylinder (6).
5. The marine cable lateral pressure resistance testing device according to claim 4, characterized in that: The width of the test indenter decreases along the direction toward the marine cable.
6. The lateral pressure resistance testing device for marine cables according to claim 5, characterized in that: The slope of the width reduction of the test indenter includes various specifications.
7. The lateral pressure resistance testing device for marine cables according to claim 1, characterized in that: One end of the test station is provided with a support frame (8) for supporting the marine cable, and the support frame (8) is provided with a plurality of support rollers (8.1) distributed along the axial direction of the marine cable.
8. The lateral pressure resistance testing device for marine cables according to claim 7, characterized in that: The middle section of the support roller (8.1) is provided with a V-shaped support groove (8.1.1).
9. The lateral pressure resistance testing device for marine cables according to claim 1, characterized in that: The other end of the test station is equipped with a thrust servo cylinder (9), which is used to test the friction force of the marine cable under the pressure of the test head.
10. The lateral pressure resistance testing device for marine cables according to claim 9, characterized in that: The drive end of the thrust servo cylinder (9) is connected to a drive disk (10), and the drive disk (10) has an anti-detachment hole (10.1) at one end near the test station.