Experimental device and method for comprehensively verifying sealant performance of oil-filled submarine cable

Abstract

The invention relates to the technical field of sealant performance verification of oil-filled submarine cables, in particular to an experimental device and method for comprehensively verifying sealant performance of oil-filled submarine cables. The experimental device comprises a first substrate and a second substrate; the at least two experiment boards are arranged between the first substrate and the second substrate; the adjusting part is used for limiting the minimum distance between the first substrate and the second substrate; injection holes penetrating through the contact surfaces of the experiment plates are formed in the experiment plates, when fluid enters the injection holes, the fluid can enter gaps between the contact surfaces of the experiment plates through the injection holes, and the adjusting piece can adjust the gaps between the contact surfaces of the experiment plates by adjusting the minimum distance. The experimental device can comprehensively evaluate the permeability, the curing performance and the sealing performance of the sealant at a time, the tedious process that multiple devices need to be used for testing respectively in a traditional method is avoided, and the testing efficiency is remarkably improved; the experimental operation process is simplified, meanwhile, the equipment purchase and maintenance cost is reduced, and the total cost of sealant type selection is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of verifying the performance of oil-filled submarine cable sealants, and particularly to an experimental device and method for comprehensively verifying the performance of oil-filled submarine cable sealants. Background Art

[0002] Most of the existing experimental devices focus on testing a certain specific performance of the sealant, such as a penetration tester, a curing degree tester, a sealing pressure tester, etc. When these devices are used alone, they cannot comprehensively evaluate the comprehensive performance of the sealant in actual applications.

[0003] Currently, in the actual application of comprehensively verifying the penetration, curing and sealing performance of oil-filled submarine cable sealants, the sealant faces complex environmental conditions, such as pressure changes. However, traditional experimental devices are difficult to simultaneously simulate these complex working conditions, resulting in deviations between the test results and the actual application situation. Since different devices are required to test the penetration, curing and sealing performance of the sealant respectively, the entire test process takes a long time, increasing the cost of selection and quality control. Summary of the Invention

[0004] In view of the above problems that it is difficult to simultaneously simulate these complex working conditions in the existing simulation of the penetration, curing and sealing performance of oil-filled submarine cable sealants, which will also lead to deviations between the test results and the actual application situation, and since different devices are required to test the penetration, curing and sealing performance of the sealant respectively, the entire test process takes a long time, increasing the cost of selection and quality control, the present invention is proposed.

[0005] Therefore, the object of the present invention is to provide an experimental device for comprehensively verifying the performance of oil-filled submarine cable sealants.

[0006] To solve the above technical problems, the present invention provides the following technical solution: An experimental device for comprehensively verifying the performance of oil-filled submarine cable sealants, comprising,

[0007] A first substrate and a second substrate;

[0008] At least two experimental plates, disposed between the first substrate and the second substrate;

[0009] An adjusting member, used to define the minimum distance between the first substrate and the second substrate;

[0010] An injection hole penetrating through the contact surface between the experimental plates is formed on the experimental plate. When a fluid enters the injection hole, it can enter the gap between the contact surfaces of the experimental plates through the injection hole, and the adjusting member can adjust the gap between the contact surfaces of the experimental plates by adjusting the minimum distance.

[0011] As a preferred embodiment of the experimental device for comprehensively verifying the performance of the sealant for oil-filled submarine cables in the present invention, wherein: the adjusting member is disposed between the first substrate and the second substrate, and the distance between the first substrate and the second substrate is restricted by the size of the adjusting member.

[0012] As a preferred embodiment of the experimental device for comprehensively verifying the performance of the sealant for oil-filled submarine cables in the present invention, wherein: the adjusting member at least comprises two split structures, and the size of the adjusting member can be adjusted by the combination of the split structures.

[0013] As a preferred embodiment of the experimental device for comprehensively verifying the performance of the sealant for oil-filled submarine cables in the present invention, wherein: the adjusting member at least comprises two split structures, and the size of the adjusting member can be adjusted by the plug-in connection between the splits.

[0014] As a preferred embodiment of the experimental device for comprehensively verifying the performance of the sealant for oil-filled submarine cables in the present invention, wherein: the second substrate comprises a pressing plate and a cover plate, and the pressing plate and the cover plate are bolted to the first substrate.

[0015] As a preferred embodiment of the experimental device for comprehensively verifying the performance of the sealant for oil-filled submarine cables in the present invention, wherein: a restricting member is provided on the first substrate, and the restricting member cooperates with the first substrate to limit the experimental plate.

[0016] As a preferred embodiment of the experimental device for comprehensively verifying the performance of the sealant for oil-filled submarine cables in the present invention, wherein: the experimental plate comprises a lead plate, three layers of copper sheets, a polyethylene plate and a copper plate placed in sequence between the first substrate and the second substrate to simulate the internal structure of the oil-filled submarine cable.

[0017] As a preferred embodiment of the experimental device for comprehensively verifying the performance of the sealant for oil-filled submarine cables in the present invention, wherein: the entire experiment is limited in scope by providing auxiliary members on the first substrate, the second substrate and the experimental plate;

[0018] The auxiliary member includes a rectangular sealing groove and a circular sealing groove opened on the first substrate and the second substrate for restricting the flow range of the sealant. A relief groove is opened on the first substrate to facilitate the retraction of the face milling cutter during cutting. A first sealing groove is opened on the pressing plate. The opening of the first sealing groove creates a skylight for the face milling cutter to perform cutting operations on the pressing plate. The opening of the first sealing groove facilitates the opening of a second sealing groove on the experimental plate. The opening of the second sealing groove facilitates the penetration of the sealant along the gap between the experimental plates, thereby forming a sealing band on the side of the experimental device to prevent leakage during air sealing verification.

[0019] As a preferred embodiment of the experimental device for comprehensively verifying the performance of the sealant for oil-filled submarine cables in the present invention, wherein: an adding member is provided on the second substrate, and a fluid is added through the adding member connected to the injection hole.

[0020] An experimental method for comprehensively verifying the performance of the sealant for oil-filled submarine cables, including an experimental device for comprehensively verifying the performance of the sealant for oil-filled submarine cables, comprising the following steps:

[0021] The preliminary composition to be experimented is completed by installing the experimental board and the second substrate in cooperation with the first substrate;

[0022] Then, the sealant is injected through the filling assembly and the injection hole, and the performance of the sealant is judged;

[0023] When it is observed that the sealant penetrates on the first substrate and the second substrate, it indicates that the penetration of the sealant in the gap of the experimental board is uniform;

[0024] The curing condition of the gap between the experimental boards is judged by observing the curing condition of the sealant on the first substrate and the second substrate;

[0025] Then, the experimental board is connected to the inspection gas and immersed in a water tank, and whether bubbles are generated is observed to judge the sealing effect;

[0026] Finally, the experimental device is disassembled, and it is observed whether a uniform sealant film is formed on the experimental board. If a uniform sealant film is formed, it indicates that the curing effect of the sealant is very good and meets the requirements of penetration and curing.

[0027] Advantages of the present invention: This experimental device can comprehensively evaluate the penetration performance, curing performance, and sealing performance of the sealant at one time, avoiding the cumbersome process of using multiple devices for separate tests in the traditional method, and significantly improving the test efficiency;

[0028] The device can simulate different gap structures of oil-filled submarine cables and perform tests in combination with pressure conditions, making the test results closer to the actual application scenario, and improving the accuracy and reliability of the test; The device has a reasonable structural design, and each component (such as the first substrate, pressing plate, cover plate, sealing groove, etc.) works together, simplifying the experimental operation process. At the same time, multiple performance tests can be completed through one experiment, reducing the equipment purchase and maintenance costs, and reducing the overall cost of sealant selection; The device is equipped with a pressure sensor and a ball valve, which can monitor the injection pressure of the sealant in real time and accurately control the on-off of the gas source through the ball valve to ensure the accuracy and repeatability of the experimental process;

[0029] By submerging the device in a water tank and applying a seal verification pressure, and observing the generation of bubbles, the sealing performance of the sealant can be visually judged. The operation is simple and the results are easy to observe. The adjustment components such as the adjusting parts and stoppers in the device are flexibly designed and can adapt to experimental plates of different specifications and gap requirements, expanding the applicable range of the device. The components such as the sealant cartridge and plug in the device are designed as detachable structures, which is convenient for cleaning the cured sealant after the experiment and reduces the maintenance workload.

[0030] In summary, through the integrated design and multi-functional testing capabilities, the present invention significantly improves the efficiency, accuracy, and economy of sealant performance testing, and has important practical application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0032] Figure 1 It is a schematic diagram of the overall structure of the experimental device for comprehensively verifying the performance of the sealant for oil-filled submarine cables according to the present invention.

[0033] Figure 2 For the appendix Figure 1 It is a schematic diagram of the enlarged structure of part A in the figure.

[0034] Figure 3 It is a schematic diagram of the structure of the second substrate of the experimental device for comprehensively verifying the performance of the sealant for oil-filled submarine cables according to the present invention.

[0035] Figure 4 It is a schematic diagram of the structure of the limiting part of the experimental device for comprehensively verifying the performance of the sealant for oil-filled submarine cables according to the present invention.

[0036] Figure 5 It is a schematic diagram of the structure of the auxiliary part opened on the first substrate of the experimental device for comprehensively verifying the performance of the sealant for oil-filled submarine cables according to the present invention.

[0037] Figure 6 It is a schematic diagram of the structure of the auxiliary part opened on the second substrate of the experimental device for comprehensively verifying the performance of the sealant for oil-filled submarine cables according to the present invention.

[0038] Figure 7 It is a schematic diagram of one structure of the adjusting part of the experimental device for comprehensively verifying the performance of the sealant for oil-filled submarine cables according to the present invention.

[0039] Figure 8 It is a schematic diagram of another structure of the adjusting part of the experimental device for comprehensively verifying the performance of the sealant for oil-filled submarine cables according to the present invention.

[0040] Reference numerals in the drawings: 1, first substrate; 2, second substrate; 21, pressing plate; 22, cover plate; 3, experimental plate; 31, lead plate; 32, copper sheet; 33, polyethylene plate; 34, copper plate; 4, adjusting member; 41, limiting post; 43, pushing groove; 44, pushing post; 5, restricting member; 51, stop block; 52, restricting block; 53, pre-tightening bolt; 6, auxiliary member; 61, rectangular sealing groove; 62, circular sealing groove; 63, relief groove; 64, first sealing groove; 65, second sealing groove; 7, filling member; 71, cartridge; 72, end cap; 73, tee; 74, pressure sensor; 75, ball valve; 76, air pipe joint; 77, plug; 8, injection hole. Detailed implementation manners

[0041] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the following detailed description of the specific implementation manners of the present invention will be given in conjunction with the drawings in the specification.

[0042] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Those skilled in the art can make similar generalizations without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0043] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure or characteristic that can be included in at least one implementation manner of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it an embodiment that is separate from or mutually exclusive of other embodiments selectively.

[0044] Furthermore, the present invention will be described in detail in conjunction with the schematic diagrams. When describing the embodiments of the present invention in detail, for the convenience of explanation, the cross-sectional views showing the device structure will be enlarged locally not in accordance with the general scale, and the schematic diagrams are only examples and should not limit the scope of protection of the present invention herein. In addition, in actual production, three-dimensional spatial dimensions including length, width and depth should be included.

[0045] Embodiment 1

[0046] Refer to Figure 1 - Figure 4, which is the first embodiment of the present invention, provides an experimental device for comprehensively verifying the performance of the sealant for oil-filled submarine cables. This device includes a first substrate 1 and a second substrate 2; at least two experimental plates 3, arranged between the first substrate 1 and the second substrate 2; an adjusting member 4, used to define the minimum distance between the first substrate 1 and the second substrate 2; an injection hole 8 is opened on the experimental plate 3 through the contact surface between the experimental plates 3. When the fluid enters the injection hole 8, it can enter the gap between the contact surfaces of the experimental plates 3 through the injection hole 8, and the adjusting member 4 can adjust the gap between the contact surfaces of the experimental plates 3 by adjusting the minimum distance.

[0047] Specifically, the second substrate 2 includes a pressing plate 21 and a cover plate 22. The pressing plate 21 and the cover plate 22 are bolted to the first substrate 1, and the first substrate 1, the experimental plate 3, and the second substrate 2 are connected by bolts.

[0048] Furthermore, the experimental plate 3 includes a lead plate 31, a copper sheet 32, a polyethylene plate 33, and a copper plate 34 placed in sequence between the first substrate 1 and the pressing plate 21 to simulate the internal structure of the oil-filled submarine cable. Among them, there are three layers of copper sheets 32 to simulate the internal structure of the oil-filled submarine cable.

[0049] Still further, a limiting member 5 is provided on the first substrate 1. The limiting member 5 cooperates with the first substrate 1 to limit the experimental plate 3. The limiting member 5 includes a stopper 51 movably connected to the first substrate 1. The stopper 51 is arranged on one side of the first substrate 1 to limit the experimental plate 3. A limiting block 52 is fixedly connected to the first substrate 1 on the side close to the stopper 51. The limiting blocks 52 are respectively at both ends on one side of the first substrate 1. The limiting block 52 is provided with a pre-tightening bolt 53. By rotating the pre-tightening bolt 53 on the limiting block 52, the stopper 51 is further pushed, so that the stopper 51 limits the left and right positions of the experimental plate 3;

[0050] Among them, the lead plate 31, three layers of copper sheets 32, the polyethylene plate 33, and the copper plate 34 are placed on the first substrate 1 in sequence, and the pre-tightening bolt 53 is used to squeeze the stopper 51 to ensure that the lead plate 31, three layers of copper sheets 32, the polyethylene plate 33, and the copper plate 34 are in close contact with the convex table surface on the first substrate 1.

[0051] Furthermore, the adjusting member 4 is used to limit the minimum spacing between the first substrate 1 and the second substrate 2. When the experimental board 3 needs to be adjusted, the first substrate 1 and the second substrate 2 are pressed by placing the adjusting member 4 to limit the minimum spacing between the first substrate 1 and the second substrate 2. Each adjusting member 4 has a different height. The adjusting members 4 are placed on both sides of the first substrate 1, respectively, and are generally an even number so that balance can be achieved after the adjusting members 4 are placed. When the gap in the experimental board 3 needs to be adjusted, the adjusting members 4 of different heights need to be replaced to adjust the height between the first substrate 1 and the pressure plate 21. The adjusting members 4 of different heights are placed. When the first substrate 1 is connected to the pressure plate 21 of the second substrate 2 by bolts, the adjusting members 4 are in close contact with the first substrate 1 and the pressure plate 21. The adjusting members 4 of different heights change the gaps between the lead plate 31, the three layers of copper skin 32, the polyethylene plate 33 and the copper plate 34. The sealant is injected through the injection hole 8 to simulate the penetration, curing and sealing performance of the sealant under different gap conditions.

[0052] During the operation, the lead plate 31, the three-layer copper sheet 32, the polyethylene plate 33 and the copper plate 34 are installed between the first substrate 1 and the pressure plate 21 in a certain order, and then the gap size between the lead plate 31, the three-layer copper sheet 32, the polyethylene plate 33 and the copper plate 34 is determined by the height of the adjusting member 4, and then the pre-tightening bolt 53 is rotated to push the stopper 51 and then match the raised side of the first substrate 1 so that the stopper 51 is buckled against one side of the experimental board 3, so as to realize the positioning of the lead plate 31, the three-layer copper sheet 32, the polyethylene plate 33 and the copper plate 34 after installation, and finally the upper and lower positions of the lead plate 31, the three-layer copper sheet 32, the polyethylene plate 33 and the copper plate 34 are limited by the cover plate 22 and the use of the fastening bolts, thereby completing the assembly of the entire device;

[0053] When the position of the adjusting member 4 needs to be adjusted, the cover plate 22 and the fastening bolts on the cover plate 22 need to be removed, and then the adjusting member 4 of a different height needs to be replaced.

[0054] Example 2

[0055] Reference Figure 7 , which is the second embodiment of the present invention, provides an experimental device for comprehensively verifying the performance of sealants in oil-filled submarine cables. The adjusting member 4 of this device includes at least two split structures, and the size of the adjusting member 4 can be adjusted by combining the split structures.

[0056] Among them, the adjusting member 4 has several split structures, the adjusting member 4 can be block-shaped, the adjusting member 4 is magnetic, and the bottom side of the adjusting member 4 is fixedly connected to the limiting column 41, and a limiting groove is opened on the position of the first substrate 1 corresponding to the limiting column 41. The position of the adjusting member 4 is further limited by the limiting groove, and the installation stability of the adjusting member 4 is improved. When it is necessary to adjust the gap of the experimental board 3, different numbers of adjusting members 4 are installed to limit the height between the first substrate 1 and the pressure plate 21.

[0057] During the operation process, when it is necessary to simulate different gaps of the experimental board 3 in the experiment, the adjusting member 4 needs to be adjusted. In this embodiment, the first magnetic attraction adjusting member 4 needs to be installed through the limiting groove on the first substrate 1. Then, when the height needs to be adjusted, after removing the cover plate 22 and the fastening bolts on the cover plate 22, hold another adjusting member 4 without the limiting column 41 and directly magnetically attract it on the previous adjusting member 4. This avoids unstable placement, can directly add the adjusting member 4 on the original basis without replacement, reduces the cumbersome replacement, and has better stability.

[0058] Embodiment 3

[0059] Refer to Figure 8 , which is the third embodiment of the present invention. An experimental device for comprehensively verifying the performance of the filling oil submarine cable sealant is provided. The adjusting member 4 of this device includes at least two split structures, and the size of the adjusting member 4 can be adjusted through the plug-in connection between the splits.

[0060] Specifically, there are several adjusting members 4 with the same height. A pushing groove 43 is formed on the adjusting member 4. The pushing groove 43 is arranged on both sides of the adjusting member 4 and has a trapezoidal cross-section. A pushing column 44 is fixedly connected to the bottom side of the adjusting member 4. The pushing column 44 and the pushing groove 43 are in an embedded fit for plug-in connection. In this way, when it is necessary to adjust the gap of the experimental board 3, only need to insert and push the pushing column 44 and the adjusting member 4 at the same horizontal plane and then push. The movement track is gradually lifted upward to increase the height of the adjusting member 4, so as to change the height between the first substrate 1 and the pressing plate 21.

[0061] During the operation process, when it is necessary to simulate different gaps of the experimental board 3 in the experiment, the adjusting member 4 needs to be adjusted. In this embodiment, it is necessary to reverse-rotate the pre-tightening bolt 53 to make the cover plate 22 and the first substrate 1 have a certain looseness. At this time, you can directly hold another adjusting member 4 with a pushing column 44, insert and embed the pushing column 44 and the pushing groove 43 along the same horizontal height of the original adjusting member 4, and then directly push the adjusting member 4, so that the height between the pressing plate 21 and the first substrate 1 can be directly changed. This method is more labor-saving and convenient.

[0062] Embodiment 4

[0063] Refer to Figure 1 - Figure 6 , which is the fourth embodiment of the present invention. An experimental device for comprehensively verifying the performance of the filling oil submarine cable sealant is provided. This device includes that auxiliary members 6 are arranged on the first substrate 1, the second substrate 2 and the experimental board 3 to limit the scope of the whole experiment.

[0064] Specifically, an additive member 7 is provided on the second substrate 2, and fluid is added through the additive member 7 connected to the injection hole 8;

[0065] Among them, the auxiliary member 6 includes a rectangular sealing groove 61 and a circular sealing groove 62 opened on the first substrate 1, the pressing plate 21, and the cover plate 22 to limit the flow range of the sealant. A relief groove 63 is opened on the first substrate 1 to facilitate the retraction of the end mill during cutting. A first sealing groove 64 is opened on the pressing plate 21. The opening of the first sealing groove 64 makes a skylight for the end mill to perform cutting operations on the pressing plate 21. Through the opening of the first sealing groove 64, it is convenient to open a second sealing groove 65 on the experimental plate 3. The opening of the second sealing groove 65 facilitates the penetration of the sealant along the gap between the experimental plates 3, so as to form a sealing band on the side of the experimental device and prevent air from leaking to both sides during seal verification;

[0066] Among them, a sealing strip is installed in the rectangular sealing groove 61 opened on the first substrate 1 to seal the gap between the first substrate 1 and the lead plate 31. The relief groove 63 is used for the end mill to retract during cutting the first sealing groove 64 to avoid damaging the first substrate 1 and ensure the machining accuracy of the first sealing groove 64;

[0067] Among them, the rectangular sealing groove 61, the circular sealing groove 62, and the first sealing groove 64 opened on the pressing plate 21. A sealing strip is installed in the rectangular sealing groove 61 to seal the outer boundary of the sealant between the pressing plate 21 and the copper plate 34. A sealing O-ring is installed in the circular sealing groove 62 to seal the inner boundary of the sealant between the pressing plate 21 and the copper plate 34. The first sealing groove 64 is used for the end mill to cut the copper plate 34, the polyethylene plate 33, the three-layer copper skin 32, and the lead plate 31, so that a second sealing groove 65 is left after cutting;

[0068] Among them, the rectangular sealing groove 61 and the circular sealing groove 62 are opened on the cover plate 22, which limits the flow range of the sealant. A sealing strip is installed in the rectangular sealing groove 61 to seal the outer boundary of the sealant between the cover plate 22 and the pressing plate 21. A sealing O-ring is installed in the circular sealing groove 62 to seal the inner boundary of the sealant between the cover plate 22 and the pressing plate 21.

[0069] Further, the additive member 7 includes a cartridge 71 provided on the cover plate 22. The cartridge 71 is detachably connected to the cover plate 22 and extends under the pressing plate 21. An end cap 72 movably connected to the cartridge 71. A tee 73 fixedly connected to one side of the cartridge 71. A pressure sensor 74 connected to one side of the tee 73 and a ball valve 75 connected to the other side. The ball valve 75 is fixedly connected to the air pipe joint 76. The sealant is injected through the cartridge 71, and the ball valve 75 is used to start and close the injection of the sealant;

[0070] Among them, the injection hole 8 on the first substrate 1 is blocked by a plug 77. The injection hole 8 is used to clean the cured sealant. Since it is necessary to first block the injection hole 8 on the first substrate 1 with the plug 77, and then inject the sealant. After waiting for it to cure, the sealant is then cleaned to prevent air from affecting the sealing performance, so that air cannot reach the gap between layers.

[0071] During the operation process, by opening the auxiliary part 6 on the experimental board 3, the experimental board 3 can perform experiments more realistically under the action of the auxiliary part 6, and the injection of the sealant can be carried out multiple times through the filling part 7.

[0072] Example 5

[0073] This is the fifth embodiment of the present invention, which provides an experimental method for comprehensively verifying the performance of the sealant for oil-filled submarine cables, specifically including the following steps:

[0074] S1. Complete the preliminary composition of the experiment to be carried out by installing the first substrate 1 in combination with the experimental board 3 and the second substrate 2;

[0075] S2. Then inject the sealant through the filling component and the injection hole 8 and judge the performance of the sealant;

[0076] S3. When it is observed that the sealant penetrates on the first substrate 1 and the second substrate 2, it indicates that the penetration of the sealant in the gap of the experimental board 3 is uniform;

[0077] S4. Judge the curing condition of the gap between the experimental boards 3 by observing the curing condition of the sealant on the first substrate 1 and the second substrate 2;

[0078] S5. Then connect the experimental board 3 to the inspection gas and immerse it in a water tank, and observe whether bubbles are generated to judge the sealing effect;

[0079] S6. Finally, disassemble the experimental device and observe whether a uniform sealant film is formed on the experimental board 3. If a uniform sealant film is formed, it indicates that the curing effect of the sealant is very good and meets the requirements of penetration and curing.

[0080] Operation process: Place the lead plate 31, 3 layers of copper sheets 32, polyethylene plate 33 and copper plate 34 together in sequence, which is the initial thickness of the experimental plate 3; Place the experimental plate 3 on the first substrate 1 of the experimental device, and place adjusting parts 4 on both sides. Use adjusting parts 4 with different heights to adjust the compression amount of the experimental plate 3, and fix the experimental plate 3 with the stopper 51 and the pre-tightening bolt 53; Install the pressing plate 21 of the experimental device, and the compression amount of the experimental plate 3; Open sealing grooves on the copper plate 34, polyethylene plate 33, 3 layers of copper sheets 32 and lead plate 31. Wait for the sealant to penetrate into the sealing grooves along the gaps between the copper plate 34 and the polyethylene plate 33, the polyethylene plate 33 and the copper sheet 32, the copper sheet 32 and the copper sheet 32, and the copper sheet 32 and the lead plate 31, so as to form a sealing strip on the side of the experimental device to prevent air from leaking to both sides during seal verification; Install the cover plate 22, plug 77 and barrel 71; Connect the end cover 72 of the barrel 71, three-way pipe 73, pressure sensor 74, ball valve 75 and air pipe joint 76; Close the ball valve 75 and connect to the air source; Mix the sealant fully according to the ratio and pour it into the barrel 71; Install the end cover 72 of the barrel 71 of the experimental device; Adjust the injection pressure of the sealant to zero to 0.6 MPa, and observe the penetration of the sealant on the side and end faces of the experimental device; When the sealant oozes out from the side and end faces of the experimental device, close the ball valve 75 and wait for the sealant to cure; After the sealant cures, remove the plug 77, barrel 71 and end cover 72 of the barrel 71, and clean the cured sealant in the sealing cavity; Reinstall the plug 77, barrel 71 and end cover 72 of the barrel 71, and completely immerse the experimental device in the water tank; Open the ball valve 75, adjust the seal verification pressure of the sealant to zero to 0.6 MPa, and observe whether there are bubbles on the side and end faces of the experimental device to judge the sealing performance of the sealant; Disassemble the cover plate 22, pressing plate 21, copper plate 34, polyethylene plate 33, 3 layers of copper sheets 32 and lead plate 31, and observe whether the sealant penetrates evenly between the copper plate 34 and the polyethylene plate 33, the polyethylene plate 33 and the copper sheet 32, the copper sheet 32 and the copper sheet 32, and the copper sheet 32 and the lead plate 31; Clean the experimental device to complete the sealant penetration, curing and sealing performance experiments;

[0081] The experimental results of the performance of the sealant are as follows: 1. The sealant penetrates outward along the gaps between the copper plate 34, polyethylene plate 33, 3 layers of copper sheets 32 and lead plate 31 from the injection hole 8. The sealant penetrates into the sealing grooves to seal the end faces on both sides of the adjusting part 4. When it is observed that the sealant penetrates to the first substrate 1 on both sides of the adjusting part 4 and the side of the stopper 51, it indicates that the sealant penetrates evenly in the gaps between the copper plate 34, polyethylene plate 33, 3 layers of copper sheets 32 and lead plate 31;

[0082] 2. Observe the curing situation of the sealant penetrating to the first substrate 1 on both sides of the adjusting part 4 and the side of the stopper 51 to judge the curing situation of the sealant in the gaps between the copper plate 34, polyethylene plate 33, 3 layers of copper sheets 32 and lead plate 31;

[0083] 3. After the sealant is cured, remove the plug 77 on the first substrate 1, clean the cured sealant in the flow channel, and ensure the smooth flow of the seal verification gas in the flow channel;

[0084] 4. After reinstalling the experimental device and connecting the seal verification gas, immerse the experimental device in the water tank, open the ball valve 75, and observe whether bubbles are generated. If no bubbles are generated, it indicates that the sealant can seal the gaps between the copper plate 34, the polyethylene plates 33, the three-layer copper sheets 32, and the lead plate 31, meeting the sealing requirements;

[0085] 5. Disassemble the experimental device and observe whether a uniform sealant film is formed on the copper plate 34, the polyethylene plates 33, the three-layer copper sheets 32, and the lead plate 31. If a uniform sealant film is formed, it indicates that the curing effect of the sealant is very good, meeting the requirements of penetration and curing.

[0086] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not restrictive. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. An experimental device for comprehensively verifying the performance of the sealant for oil-filled submarine cables, characterized in that: Comprising, a first substrate (1) and a second substrate (2); at least two experimental plates (3), disposed between the first substrate (1) and the second substrate (2); a regulating member (4), for defining the minimum distance between the first substrate (1) and the second substrate (2); an injection hole (8) penetrating through the contact surface between the experimental plates (3) is formed on the experimental plate (3). When a fluid enters the injection hole (8), it can enter the gap between the contact surfaces of the experimental plates (3) through the injection hole (8). The regulating member (4) can adjust the gap between the contact surfaces of the experimental plates (3) by adjusting the minimum distance.

2. The experimental device for comprehensively verifying the performance of the sealing agent for oil-filled submarine cables according to claim 1, wherein: The regulating member (4) is disposed between the first substrate (1) and the second substrate (2), and the distance between the first substrate (1) and the second substrate (2) is limited by the size of the regulating member (4).

3. The experimental device for comprehensively verifying the performance of the sealing agent for oil-filled submarine cables according to claim 1 or 2, characterized in that: The regulating member (4) at least includes two split structures, and the size of the regulating member (4) can be adjusted by the combination of the split structures.

4. The experimental device for comprehensively verifying the performance of the sealing agent for oil-filled submarine cables according to claim 1 or 2, characterized in that: The regulating member (4) at least includes two split structures, and the size of the regulating member (4) can be adjusted by the plug-in connection between the splits.

5. The experimental device for comprehensively verifying the performance of the sealant for oil-filled submarine cables according to claim 1, characterized in that: The second substrate (2) includes a pressing plate (21) and a cover plate (22), and the pressing plate (21) and the cover plate (22) are bolted to the first substrate (1).

6. The experimental device for comprehensively verifying the performance of the sealant for oil-filled submarine cables according to claim 5, characterized in that: A limiting member (5) is provided on the first substrate (1), and the limiting member (5) cooperates with the first substrate (1) to limit the experimental plate (3).

7. The experimental device for comprehensively verifying the performance of the sealing agent for oil-filled submarine cables according to claim 6, characterized in that: The experimental plate (3) includes a lead plate (31), three layers of copper sheets (32), a polyethylene plate (33) and a copper plate (34) sequentially placed between the first substrate (1) and the second substrate (2) to simulate the internal structure of an oil-filled submarine cable.

8. The experimental device for comprehensively verifying the performance of the sealant for oil-filled submarine cables according to claim 7, characterized in that: The entire experiment is limited in scope by providing auxiliary members (6) on the first substrate (1), the second substrate (2) and the experimental plate (3); The auxiliary member (6) includes a rectangular sealing groove (61) and a circular sealing groove (62) formed on the first substrate (1) and the second substrate (2) for restricting the flow range of the sealant. A relief groove (63) is formed on the first substrate (1) to facilitate the retraction of the end mill during cutting. A first sealing groove (64) is formed on the pressing plate (21). The formation of the first sealing groove (64) creates a skylight on the pressing plate (21) for the end mill to perform cutting operations. The formation of the first sealing groove (64) facilitates the formation of a second sealing groove (65) on the experimental plate (3). The formation of the second sealing groove (65) facilitates the penetration of the sealant along the gap between the experimental plates (3), thereby forming a sealing band on the side of the experimental device to prevent leakage during airtight inspection.

9. The experimental device for comprehensively verifying the performance of the sealant for oil-filled submarine cables according to claim 8, characterized in that: An adding member (7) is provided on the second substrate (2), and the fluid is added through the adding member (7) connected to the injection hole (8).

10. An experimental method for comprehensively verifying the performance of a sealant for oil-filled submarine cables, characterized in that: Comprising the experimental device for comprehensively verifying the performance of the sealant for oil-filled submarine cables as described in any one of claims 1 to 9, including , the following steps: The preliminary composition of the experiment to be tested is completed through the installation of the first substrate (1) in cooperation with the experimental plate (3) and the second substrate (2); Then, the sealant is injected through the filling component and the injection hole (8), and the performance of the sealant is judged. When it is observed that the sealant penetrates the first substrate (1) and the second substrate (2), it indicates that the penetration of the sealant in the gap of the test board (3) is uniform. The curing condition of the gap between the test boards (3) is judged by observing the curing condition of the sealant on the first substrate (1) and the second substrate (2). Then, the test board (3) is connected to the seal inspection gas and immersed in a water tank, and whether bubbles are generated is observed to judge the sealing effect. Finally, the experimental device is disassembled, and it is observed whether a uniform sealant film is formed on the test board (3). If a uniform sealant film is formed, it indicates that the curing effect of the sealant is very good and meets the requirements of penetration and curing.

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