Test fixture and method for adhesive water barrier performance of cable penetration seals

Abstract

The application belongs to the field of cables and provides a test tool and method for the adhesive water resistance of cable cabin penetration sealing, wherein the test tool for the adhesive water resistance comprises a pressure tank assembly and a test assembly; the test assembly comprises a glue filling shell, a clamp and a replaceable medium; the lower end of the glue filling shell is connected with the pressure tank assembly, and the upper end is connected with the clamp; the replaceable medium is located between the clamp and the glue filling shell, can be detachably nested in the installation cavity of the glue filling shell, and has glue bonded therein; the clamp clamps the cable, one end of the cable passes through the replaceable medium, is bonded with the glue and enters the pressure tank assembly, seawater and pressure are injected into the pressure tank assembly for adhesive water resistance test. The water resistance between different media and glue can be tested by the application.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cables, in particular to a test tool and method for adhesive water-blocking performance of cable cabin penetration sealing. BACKGROUND

[0002] With the rapid development of offshore wind power, marine communication and offshore oil and gas engineering, the sealing reliability of submarine cables and supporting accessories has become one of the key factors to ensure the long-term stable operation of the system. In the transition area of cable cabin penetration, pipe penetration or entering the anchoring assembly, adhesive sealing materials are usually used as structural gap filling and water-blocking medium, and their performance directly determines the sealing integrity and anti-breakdown ability of the cable system under long-term water pressure.

[0003] The gel is highly sensitive to temperature and humidity during the curing process, and the curing reaction itself generates heat. If the external temperature is too high, the local overheating will be caused by the superimposed heat, resulting in defects such as cavitation and embrittlement. If the temperature is too low, the reaction will be stalled and the cross-linking will be insufficient, resulting in insufficient strength. High humidity will form a water film, micropores or accelerate the side reaction, resulting in adhesive failure. Low humidity will also cause incomplete reaction of some systems that rely on humidity for curing. The material and roughness of the gel adhesive medium will also affect the adhesive effect.

[0004] In actual engineering applications, the gel does not work in isolation, and its water-blocking performance is not only determined by its own characteristics, but also significantly affected by the system matching relationship. The compatibility between the gel and its contact medium, the state of the adhesive interface and the synergistic effect all have a decisive influence on the final water-blocking effect. SUMMARY

[0005] The purpose of the present application is to provide a test tool and method for adhesive water-blocking performance of cable cabin penetration sealing to solve the above technical problems existing in the prior art, mainly including the following contents:

[0006] The first aspect of the present application provides a test tool for adhesive water-blocking performance of cable cabin penetration sealing, comprising:

[0007] a pressure tank assembly and a test assembly;

[0008] The test assembly comprises a glue filling shell, a clamp and a replaceable medium, the lower end of the glue filling shell is connected with the pressure tank assembly, and the upper end is connected with the clamp; the replaceable medium is located between the clamp and the glue filling shell, the replaceable medium is detachably nested in the mounting cavity of the glue filling shell, and the replaceable medium has a gel adhered therein;

[0009] The clamp holds a cable, one end of the cable penetrates through the replaceable medium and is adhered to the gel to extend into the pressure tank assembly, and sea water is injected into the pressure tank assembly for adhesive water-blocking performance test.

[0010] Further, in order to better achieve the present application, the following arrangement is adopted: a plurality of channels are arranged on the inner wall of the replaceable medium in a circumferential direction, the channels extend along the axial direction of the replaceable medium, and at least pass through the upper end of the replaceable medium.

[0011] Further, in order to better achieve the present application, the following arrangement is adopted: the channel comprises a groove and a switch structure, the switch structure is installed in the groove, and one side of the switch structure is coplanar with the inner wall of the replaceable medium, and the other side defines a through cavity with the groove.

[0012] Further, in order to better achieve the present application, the following arrangement is adopted: the switch structure is provided with a through hole in the radial direction of the replaceable medium, the inlet of the through hole is communicated with the through cavity, the outlet of the through hole is provided with a switch piece, the upper end of the switch piece is fixedly connected with the inner wall of the through hole, and the lower end is abutted with the stepped surface of the through hole.

[0013] Further, in order to better achieve the present application, the following arrangement is adopted: the through hole is sequentially provided with a first expansion section, a contraction section and a second expansion section from the inlet to the outlet; the first expansion section, the contraction section and the second expansion section are communicated with each other, and the cross-sectional area of the first expansion section is smaller than that of the second expansion section.

[0014] Further, in order to better achieve the present application, the following arrangement is adopted: the lower end of the glue filling cavity of the replaceable medium is provided with a glue removing plate, the glue removing plate is provided with a limiting protrusion, and the limiting protrusion is connected with the limiting hole of the glue filling shell.

[0015] Further, in order to better achieve the present application, the following arrangement is adopted: the limiting hole is provided with a plug near one side of the pressure tank assembly.

[0016] Further, in order to better achieve the present application, the following arrangement is adopted: the lower end of the glue filling shell is provided with a support pipe, and the support pipe is located in the pressure tank assembly.

[0017] Further, in order to better achieve the present application, the following arrangement is adopted: further comprising a driving assembly, the driving assembly cooperates with the limiting protrusion to push the glue removing plate to move, so that the glue is separated from the replaceable medium.

[0018] The second aspect of the present application provides a method for testing the adhesive water resistance of cable cabin sealing, which adopts the tooling for testing the adhesive water resistance of cable cabin sealing as described above, and comprises the following steps:

[0019] The end of the cable is sequentially threaded through the clamp, the replaceable medium, the glue filling shell, and reaches the preset position in the pressure tank assembly, the cable is clamped by the clamp to limit its axial movement;

[0020] Glue is injected into the glue filling cavity of the replaceable medium;

[0021] Catalyst is injected into the channel, the catalyst flows into the glue filling cavity, and the glue is fully solidified;

[0022] The pressure tank assembly is filled with seawater, and the glue blocking water performance is tested;

[0023] At least one physical parameter is adjusted, the physical parameter includes material, pressure, temperature, humidity, roughness; wherein the material and roughness are adjusted by replacing different replaceable media;

[0024] The physical parameters after adjustment are measured and recorded to obtain test data;

[0025] An analysis model is established according to the test data, and the influence of the physical parameters on the glue blocking water performance is analyzed.

[0026] The present application has at least the following technical effects relative to the prior art:

[0027] The glue blocking water performance test tool for cable cabin sealing provided by the present application includes a pressure tank assembly and a test assembly, only the test assembly needs to be installed at the upper end of the pressure tank assembly to start the test, one end of the cable is inserted into the pressure tank assembly from the test assembly, glue is injected into the replaceable medium, after solidification, seawater with a preset pressure is injected into the pressure tank assembly, after a preset test time, the glue blocking water performance between the current replaceable medium and the glue is judged according to the test result, different materials and roughness of the replaceable medium can be replaced to continue the test, the influence of the material and roughness of the replaceable medium on the glue blocking water performance is judged, so that the most suitable material and roughness of the medium can be selected for the glue blocking to achieve the required water blocking performance according to the actual operation situation, and the test tool is simple to operate and can be reused. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments, it should be understood that the following drawings only show some embodiments of the present application, therefore should not be regarded as a limitation on the scope, for those skilled in the art, without creative labor, other related drawings can also be obtained according to these drawings.

[0029] Figure 1 It is a perspective view of the glue blocking water performance test tool for cable cabin sealing of the present application;

[0030] Figure 2 This is a cross-sectional view of the test fixture of this application along the axial direction;

[0031] Figure 3 for Figure 2 Enlarged view of section A in the middle;

[0032] Figure 4 This is a three-dimensional view of the test components of this application;

[0033] Figure 5 This is a cross-sectional view of the test component along the axial direction in this application;

[0034] Figure 6 for Figure 5 Enlarged view of section B;

[0035] Figure 7 for Figure 6 Enlarged view of section C;

[0036] Figure 8 A three-dimensional view of the replaceable media;

[0037] Figure 9 This is a cross-sectional view of the replaceable medium along the axial direction.

[0038] Figure 10 for Figure 9 Enlarged view of section D in the middle;

[0039] Figure 11 This is a 3D view of the switch structure;

[0040] Figure 12 This is a cross-sectional view of the switch structure along the axial direction.

[0041] Figure 13 for Figure 12 Enlarged view of section E in the middle;

[0042] Figure 14 This is a schematic diagram of the through hole structure;

[0043] Figure 15 This is a three-dimensional view of the potting shell;

[0044] Figure 16 This is a cross-sectional view of the potting housing along the axial direction.

[0045] Figure 17 This is a schematic diagram of the fixture's structure;

[0046] Figure 18 Schematic diagram of the drive component Figure 1 ;

[0047] Figure 19 Schematic diagram of the drive component Figure 2 .

[0048] Fig.:

[0049] 10, pressure tank assembly; 11, pressure tank; 12, support leg; 13, connecting piece; 14, interface;

[0050] 20, test assembly; 21, glue filling shell; 211, limiting hole; 212, support pipe; 213, mounting groove; 22, clamp; 221, first clamp; 222, second clamp; 2211, clamping part; 2212, connecting part; 2213, extension part; 23, replaceable medium; 231, channel; 2311, groove; 2312, switch structure; 232, glue filling cavity; 24, through cavity; 25, through hole; 251, inlet; 252, outlet; 26, switch piece; 253, first expansion section; 254, contraction section; 255, second expansion section; 256, step surface; 27, glue removing plate; 271, limiting protrusion; 28, plug; 30, glue; 40, cable;

[0051] 50, drive assembly; 51, mounting plate; 52, force applying piece; 53, drive wheel; 54, follower wheel; 55, fixed rod. DETAILED DESCRIPTION

[0052] The following description provides many different embodiments, or examples, for implementing different features of the application. Specific examples are described in enough detail to provide a thorough understanding of the embodiments of the application and the alternatives thereof. The description of elements in each example is intended to be illustrative, and is not intended to be limiting. Other embodiments can be utilized and other changes can be made without departing from the spirit or scope of the application.

[0053] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application.

[0054] In the present application, unless specifically defined and limited otherwise, the terms "mounting", "connected", "connection", "fixed", and the like, should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication of two elements or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0055] In the present application, unless specifically defined and limited otherwise, the first feature above or below the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature above, above and above the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature below, below and below the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0056] The water-tight glue is highly sensitive to temperature and humidity during the curing process, and the curing reaction itself will release heat. If the external temperature is too high, the local overheating will be caused by the superimposed heat release, resulting in defects such as cavitation and embrittlement. If the temperature is too low, the reaction will be stagnant and the cross-linking will be insufficient, resulting in insufficient strength. Humidity is also critical, and the curing is most stable in the appropriate range. If the humidity is too high, a water film, micropores or accelerated side reactions will be formed, resulting in bonding failure. If the humidity is too low, the reaction of some systems that rely on humidity curing will be incomplete. Therefore, it is necessary to systematically evaluate the effects of different temperature and humidity combinations on the curing speed, cross-linking quality and final strength, and to determine which extreme conditions will trigger failure, so as to determine the reliable process window.

[0057] The bonding of the colloid with different media of different materials will also affect the bonding effect. The difference in surface energy of different metal materials will significantly affect the wettability and interfacial bonding effect of the colloid: high surface energy materials, such as copper and aluminum after anodization, are more easily wetted and expanded by glue, forming a uniform and continuous interfacial film, thereby improving the bonding strength; low surface energy materials, such as stainless steel or surfaces treated with oil stains / passivation, are prone to local non-wetting or bubble inclusion, resulting in interfacial stress concentration and early peeling; therefore, when designing the bonding process, the difference in surface energy of the metal must be considered, and the interfacial bonding performance must be optimized through surface pretreatment (cleaning, activation or roughening).

[0058] Metal surface roughness is also an important factor affecting the effect of colloidal bonding: moderate roughening can increase the mechanical bite surface of the glue, improve the interface shear strength and peel resistance, and at the same time improve the local wettability; but if the roughness is too large or uneven, air interlayer or local stress concentration may occur, which will reduce the bonding strength. Therefore, in the design of bonding process, the surface and roughness of the metal material should be considered comprehensively, and the interface structure should be optimized by moderate grinding or surface treatment to ensure that the glue can be fully wetted and form a uniform and firm bonding layer.

[0059] In view of this, the first aspect of the present application provides a kind of for cable cabin sealing adhesive water resistance performance test tool, as shown in Figures 1-19 It comprises:

[0060] Pressure tank assembly 10 and test assembly 20.Exemplarily, the pressure tank assembly 10 comprises a pressure tank 11, a support leg 12 and a connecting piece 13, the upper end of the pressure tank 11 is detachably connected with the connecting piece 13, the lower end of the connecting piece 13 is provided with the support leg 12, the support leg 12 is distributed around the pressure tank 11, for supporting the pressure tank 11, so that the pressure tank 11 remains fixed. One side of the pressure tank 11 is provided with an interface 14, the interface 14 can be a two-way valve, the seawater pump and the air pump are connected with the interface 14 respectively, seawater and air pressure can be injected into the pressure tank 11 at the same time, to simulate the seawater environment, and provide the water pressure required for testing.

[0061] The test assembly 20 comprises a glue filling shell 21, a clamp 22 and a replaceable medium 23, the lower end of the glue filling shell 21 is connected with the pressure tank assembly 10, and the upper end is connected with the clamp 22; the replaceable medium 23 is located between the clamp 22 and the glue filling shell 21, the replaceable medium 23 can be detachably nested in the installation cavity of the glue filling shell 21, and the replaceable medium 23 is bonded with the glue 30.

[0062] Exemplarily, the lower end of the glue filling shell 21 is fixedly connected to the connecting piece 13 by bolts. The replaceable medium 23 is a cylindrical hollow structure with upper and lower openings, the upper opening is used for injecting the glue 30 into the glue filling cavity 232 of the replaceable medium 23. The bottom inner wall of the glue filling shell 21 is provided with a mounting groove 213, the mounting groove 213 is provided with a sealing element, the lower end of the replaceable medium 23 is embedded into the mounting groove 213, to avoid the glue 30 entering between the glue filling shell 21 and the replaceable medium 23. The upper end of the replaceable medium 23 is located between the lower end of the clamp 22 and the upper end of the glue filling shell 21, and the bolts are sequentially fixedly connected. The upper end of the replaceable medium 23 and the upper end of the glue filling shell 21 are further provided with a sealing ring.

[0063] In some alternative embodiments, a temperature sensor can be attached to the inner wall of the replaceable medium 23 to measure the temperature and humidity inside the replaceable medium 23 before and during the test. A displacement sensor can also be arranged on the inner wall of the replaceable medium 23 to detect the breaking height of the glue.

[0064] In some alternative embodiments, the material of the replaceable medium 23 can be metal, such as iron, copper, aluminum, etc., which is not limited here.

[0065] The clamp 22 clamps the cable 40, one end of the cable 40 passes through the replaceable medium 23 and is bonded with the glue 30 to extend into the pressure tank assembly 10, and seawater and pressure are injected into the pressure tank assembly 10 for glue bonding water resistance performance test.

[0066] For example, the clamp includes a first clamp 221 and a second clamp 222, which are the same structure and each include a clamping portion 2211 and a connecting portion 2212. The clamping portion 2211 is a semi-cylindrical structure, the connecting portion 2212 is arranged on the lower end of the outer wall of the clamping portion 2211 in a circumferential direction, and the extension portion 2213 is arranged on both sides of the outer wall of the clamping portion 2211 in an axial direction. In use, the first clamp 221 and the second clamp 222 are spliced to the outer wall of the cable 40, and then the extension portions 2213 of the first clamp 221 and the second clamp 222 are connected by bolts to clamp the cable 40, and the connecting portions 2212 are connected to the upper end of the replaceable medium 23 and the upper end of the glue pouring shell 21 by bolts.

[0067] In the above scheme, by changing the material and roughness of the replaceable medium 23, the influence of the medium and the glue 30 after bonding on the bonding performance of the glue 30 can be tested and analyzed. The test tool can also be placed in a cover, and the temperature and humidity in the cover can be adjusted to further test and analyze the influence of temperature and humidity on the glue bonding performance.

[0068] Therefore, the application provides a glue bonding water resistance performance test tool for cable cabin penetration sealing, which includes a pressure tank assembly 10 and a test assembly 20. The test assembly 20 is only needed to be installed on the upper end of the pressure tank assembly 10 to start the test. One end of the cable 40 extends into the pressure tank assembly 10 from the test assembly 20, the glue 30 is injected into the replaceable medium 23, and after it is solidified, seawater with a preset pressure is injected into the pressure tank assembly 10. After a preset test time, the glue bonding water resistance performance between the current replaceable medium 23 and the glue 30 is judged according to the test result. Different materials and roughness of the replaceable medium 23 can be replaced to continue the test to judge the influence of the material and roughness of the replaceable medium 23 on the glue bonding water resistance performance, so that the most suitable material and roughness of the medium can be selected for bonding with the glue to achieve the required water resistance performance according to the actual operation condition. The test tool is simple to operate and can be reused.

[0069] According to some optional embodiments, a plurality of channels 231 are circumferentially spaced on the inner wall of the replaceable medium 23, and each channel 231 is arranged in a spiral shape on the inner wall of the replaceable medium 23. This arrangement can avoid stress concentration, so that the pressure of the gel 30 on the channel 231 in the horizontal direction is small, and the gel 30 is not easy to enter the channel 231, thereby ensuring the accuracy of the test results and the integrity of the channel 231. The channel 231 extends in the axial direction of the replaceable medium 23, and at least penetrates the upper end of the replaceable medium 23 to form an inlet of the channel 231.

[0070] In some optional embodiments, the number of channels 231 can be 2, 3, 4, etc.

[0071] The channel 231 includes a catalyst injection channel and a degreasing agent injection channel. After the replaceable medium 23 is filled with the gel 30, a catalyst can be injected through the catalyst injection channel to accelerate the solidification of the gel and make it fully solidified. After the test is completed, a degreasing agent can be injected into the glue filling cavity 232 of the replaceable medium 23 through the degreasing agent injection channel, so that the gel 30 can be smoothly separated from the glue filling cavity 232, reducing the damage to the inner wall of the replaceable medium 23.

[0072] According to some optional embodiments, the channel 231 includes a groove 2311 and a switch structure 2312. The switch structure 2312 is made of flexible material, such as rubber material with certain hardness, to ensure that the switch structure 2312 will not enter the groove 2311 under the action of the gel 30. The upper end and the lower end of the switch structure 2312 are fixedly connected with the groove 2311 by adhesion, respectively. One side of the switch structure 2312 is coplanar with the inner wall of the replaceable medium 23, to ensure the integrity and flatness of the inner wall of the replaceable medium 23, and to ensure the accuracy of the test results. The other side and the groove 2311 define a through cavity 24, into which the degreasing agent or the catalyst can be injected and uniformly flow into the glue filling cavity 232.

[0073] According to some optional embodiments, the switch structure 2312 is in the form of a plate. The switch structure 2312 is provided with a through hole 25 in the radial direction of the replaceable medium 23. The inlet 251 of the through hole 25 communicates with the through cavity 24, and the outlet 252 of the through hole 25 is provided with a switch piece 26. The upper end of the switch piece 26 is fixedly connected with the inner wall of the through hole 25, and the lower end is in abutment with a stepped surface 256 of the through hole 25. When the gel 30 exerts a pressing force on the switch piece 26, the switch piece 26 will be more closely attached to the stepped surface 256, to ensure that the gel 30 will not enter the through hole 25.

[0074] In some alternative embodiments, the through hole 25 is arranged obliquely in the direction towards the bottom of the replaceable medium 23. In this way, when the gel 30 is poured into the replaceable medium 23, the gel 30 flows downward under the action of gravity, and the through hole 25 is also arranged obliquely downward, so that the switch structure 2312 does not generate resistance to the flow of the gel 30, and the gel 30 does not generate a large extrusion force to pass through the switch piece 26 and enter the through hole 25.

[0075] In some alternative embodiments, a plurality of switch pieces 26 are arranged at intervals in the direction from the outlet 252 to the inlet 251, and the inner wall of the through hole 25 is provided with a stepped surface 256 corresponding to each switch piece 26, to further block the gel 30 from entering the through hole 25.

[0076] In some alternative embodiments, a plurality of through holes 25 are arranged at intervals along the axial direction of the replaceable medium 23.

[0077] According to some alternative embodiments, the through hole 25 is sequentially provided with a first expansion section 253, a contraction section 254 and a second expansion section 255 in the direction from the inlet 251 to the outlet 252; the first expansion section 253, the contraction section 254 and the second expansion section 255 are in communication with each other, and the cross-sectional area of the first expansion section 253 in the axial direction is smaller than the cross-sectional area of the second expansion section 255 in the axial direction.

[0078] For example, when the channel 231 is a gel removing agent injection channel, gas with a preset pressure is first injected into the channel 231, and the gas flows along the through cavity 24, part of the gas enters the first expansion section 253 through the inlet 251, and then enters the contraction section 254 to make the gas gather and flow rapidly to the second expansion section 255, so that the speed of the gas increases, the lower end of the switch piece 26 is blown open, the gas exerts a pushing force on the gel 30, and a gap is generated between the gel 30 and the inner wall of the replaceable medium 23, and then the gel removing agent is injected into the channel 231, so that the gel removing agent can smoothly enter the gap along the through hole 25, and accelerate the gel 30 to separate from the inner wall of the replaceable medium 23.

[0079] According to some alternative embodiments, the lower end of the gel pouring cavity 232 of the replaceable medium 23 is provided with a gel removing plate 27, the gel removing plate 27 is provided with a limiting protrusion 271, and the limiting protrusion 271 is in limiting fit connection with the limiting hole 211 of the gel pouring shell 21, so as to avoid rotation of the gel removing plate 27 during testing, and affect the accuracy of the test results.

[0080] According to some alternative embodiments, the limiting hole 211 is provided with a plug 28 close to one side of the pressure tank assembly 10. The plug 28 is installed for sealing during testing, to avoid leakage of the gel 30.

[0081] According to some optional embodiments, the lower end of the glue-filling shell 21 is provided with a support pipe 212, which is located in the pressure tank assembly 10.

[0082] In the above scheme, during the test, the water pressure direction cannot be controlled when seawater is injected into the pressure tank 11, and the pressure is uneven at the beginning of the pressure injection into the pressure tank 11, which may cause the cable 40 to shake in different directions to generate shear force, and at this time, a gap may be generated between the cable 40 and the glue 30, resulting in glue sealing failure, which is not caused by water pressure. The support pipe 212 in the present application can ensure that the end of the cable 40 does not shake under water pressure, thereby avoiding the generation of a gap between the glue 30 and the cable 40.

[0083] According to some optional embodiments, the drive assembly 50 is further provided, which cooperates with the limiting protrusion 271 to push the glue-removing plate 27 to move, so that the glue 30 is separated from the replaceable medium 23.

[0084] In the above scheme, the drive assembly 50 includes a mounting plate 51, one side of the mounting plate 51 is rotatably provided with a force applying member 52, and the other side is provided with a drive wheel 53. One end of the force applying member 52 is fixedly connected with the drive wheel 53, and the outer side of the drive wheel 53 is engaged with a plurality of follower wheels 54. One side of each follower wheel 54 away from the mounting plate 51 is fixedly connected with a fixed rod 55, one end of the fixed rod 55 is fixedly connected with a screw rod, and the other end of the screw rod is threadedly connected with the limiting hole 211.

[0085] When the test is completed and the glue 30 needs to be separated from the replaceable medium 23, the plug 28 is removed, the screw rod is inserted into the limiting hole 211 and threadedly connected with the limiting hole 211, and then an external force is applied to the force applying member 52 to make it rotate. The force applying member 52 drives the drive wheel 53 to rotate, and the drive wheel 53 simultaneously drives the plurality of follower wheels 54 to rotate. The follower wheels 54 drive the fixed rods 55 to rotate, and the fixed rods 55 drive the screw rod to rotate in the limiting hole 211 and move towards the glue-removing plate 27. The screw rod abuts against the limiting protrusion 271 and pushes the glue-removing plate 27 to move upwards, so that the glue-removing plate 27 successfully peels off the glue 30 from the replaceable medium 23, and the replaceable medium 23 is successfully removed from the glue-filling shell 21 for replacement. Since the plurality of follower wheels 54 rotate simultaneously, the pushing force applied to the glue-removing plate 27 is uniform, so that the glue-removing plate 27 does not tilt and get stuck, and the inner wall of the replaceable medium 23 is not damaged.

[0086] The second aspect of the present application provides a glue blocking water performance test method for cable cabin sealing, which adopts the glue blocking water performance test tool for cable cabin sealing as described above, and includes the following steps:

[0087] One end of the cable 40 is sequentially threaded through the clamp 22, the glue filling cavity 232 of the replaceable medium 23, the support tube 212 at the lower end of the glue filling shell 21, and into a preset position in the pressure tank assembly 10, and then the cable 40 is clamped by the clamp 22 to limit its axial movement and avoid affecting the subsequent test results.

[0088] In some optional embodiments, when the glue 30 is not injected into the glue filling cavity 232 of the replaceable medium 23, a heat shrink tube is used to seal the lower end of the support tube 212 and the lower end of the cable 40 at the position where the cable 40 extends out of the support tube 212, to prevent the glue 30 from flowing out of the pressure tank 11 through the gap between the cable 40 and the support tube 212. After the glue 30 solidifies, the heat shrink tube can be removed.

[0089] The glue 30 is injected into the glue filling cavity 232 of the replaceable medium 23, which is bonded to the glue filling cavity 232 of the replaceable medium 23 and to the outer wall of the cable 40 located in the glue filling cavity 232;

[0090] The catalyst is injected into the catalyst injection channel, flows into the glue filling cavity 232, accelerates the solidification of the glue 30, and waits for the glue 30 to solidify sufficiently;

[0091] Full seawater is injected into the pressure tank assembly 10 and a preset pressure is injected to test the glue blocking water performance, for example, seawater and a preset pressure can be simultaneously injected into the pressure tank 11 through the interface 14;

[0092] At least one physical parameter is adjusted, including material, pressure, temperature, humidity, roughness; the influence of each physical parameter on the glue blocking water performance can be tested by the control variable method. Among them, the material and roughness can be adjusted by replacing different replaceable media 23; the pressure in the physical parameter can be adjusted by injecting different pressures into the pressure tank 11; the test tool can also be placed in a cover, and the temperature in the cover can be adjusted by a heating device, and the humidity in the cover can be adjusted by a humidifier device, so as to change the influence of different temperatures and humidities in the physical parameter on the glue blocking water performance;

[0093] The physical parameters after adjustment are measured and recorded to obtain test data, for example, the temperature and humidity changes between the glue 30 and different replaceable media 23 before and during the test can be tested and recorded by the temperature sensor installed in the replaceable medium 23; the displacement sensor is installed at different preset positions of the replaceable medium 23, and when the glue 30 and the replaceable medium 23 fail at different positions, the breakthrough height of the glue can be obtained in time.

[0094] According to the test data, an analysis model is established to analyze the influence of the physical parameters on the adhesive water-blocking performance. For example, different curve graphs can be formed according to the pressure, material, humidity, temperature, breakdown height and the like in the test data, and input into the analysis model, so that the influence of each factor on the adhesive water-blocking performance can be specifically analyzed.

[0095] It should be noted that in this document, the terms "comprising", "including", or any other variant thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements, but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without more limitations, an element defined by the statement "comprising a" does not exclude the existence of additional identical elements in the process, method, article, or apparatus that includes the element. In addition, it should be pointed out that the scope of the methods and apparatus in the embodiments of the present application is not limited to performing functions in the order shown or discussed, but can also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method can be performed in an order different from that described, and various steps can also be added, omitted, or combined. In addition, the features described with reference to certain examples can be combined in other examples.

[0096] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A testing fixture for the adhesive water-blocking performance of cable penetration sealing, characterized in that, include: Pressure tank assembly (10) and test assembly (20); The test assembly (20) includes a potting housing (21), a clamp (22), and a replaceable medium (23). The lower end of the potting housing (21) is connected to the pressure tank assembly (10), and the upper end is connected to the clamp (22). The replaceable medium (23) is located between the clamp (22) and the potting housing (21). The replaceable medium (23) is detachably nested in the mounting cavity of the potting housing (21), and the replaceable medium (23) contains adhesive (30). The clamp (22) holds the cable (40), one end of the cable (40) passes through the replaceable medium (23) and is bonded to the colloid (30) and extends into the pressure tank assembly (10). Seawater is injected into the pressure tank assembly (10) to test the adhesive water-blocking performance. The inner wall of the replaceable medium (23) is provided with a plurality of channels (231) spaced apart along the circumference. The channels (231) extend along the axial direction of the replaceable medium (23) and penetrate at least through the upper end of the replaceable medium (23).

2. The adhesive water-blocking performance testing fixture as described in claim 1, characterized in that, The channel (231) includes a groove (2311) and a switch structure (2312). The switch structure (2312) is installed in the groove (2311), and one side of the switch structure (2312) is coplanar with the inner wall of the replaceable medium (23), and the other side defines a cavity (24) between the switch structure (2312) and the groove (2311).

3. The adhesive water-blocking performance testing fixture as described in claim 2, characterized in that, The switch structure (2312) has a through hole (25) along the radial direction of the replaceable medium (23). The inlet (251) of the through hole (25) is connected to the through cavity (24). The outlet (252) of the through hole (25) is provided with a switch element (26). The upper end of the switch element (26) is fixedly connected to the inner wall of the through hole (25), and the lower end abuts against the stepped surface (256) of the through hole (25).

4. The adhesive water-blocking performance testing fixture as described in claim 3, characterized in that, The through hole (25) is provided with a first expansion section (253), a contraction section (254) and a second expansion section (255) in sequence along the direction from the inlet (251) to the outlet (252); the first expansion section (253), the contraction section (254) and the second expansion section (255) are interconnected, and the cross-sectional area of ​​the first expansion section (253) is smaller than the cross-sectional area of ​​the second expansion section (255).

5. The adhesive water-blocking performance testing fixture as described in claim 1, characterized in that, The lower end of the glue-filling cavity (232) of the replaceable medium (23) is provided with a glue-removing plate (27), and a limiting protrusion (271) is provided on the glue-removing plate (27). The limiting protrusion (271) is connected to the limiting hole (211) of the glue-filling housing (21).

6. The adhesive water-blocking performance testing fixture as described in claim 5, characterized in that, A plug (28) is installed on the side of the limiting hole (211) near the pressure tank assembly (10).

7. The adhesive water-blocking performance testing fixture as described in claim 1, characterized in that, The lower end of the glue-filling housing (21) is provided with a support tube (212), which is located inside the pressure tank assembly (10).

8. The adhesive water-blocking performance testing fixture as described in claim 5, characterized in that, It also includes a drive assembly (50) that cooperates with the limiting protrusion (271) to push the adhesive removal plate (27) to move, so that the adhesive (30) is removed from the replaceable medium (23).

9. A method for testing the water-blocking performance of adhesive used for cable penetration sealing, characterized in that, The adhesive water-blocking performance testing fixture for cable penetration sealing as described in any one of claims 1-8 includes the following steps: One end of the cable (40) is passed through the clamp (22), the replaceable medium (23), and the potting housing (21) in sequence, and enters the preset position in the pressure tank assembly (10). The clamp (22) is used to clamp the cable (40) and restrict its axial movement. Inject colloid (30) into the glue-filling cavity (232) of the replaceable medium (23); A catalyst is injected into the channel (231), and the catalyst flows into the glue-filling cavity (232) while waiting for the colloid (30) to fully cure. Seawater was filled into the pressure tank assembly (10) and the adhesive water-blocking performance was tested; Adjust at least one physical parameter, including material, pressure, temperature, humidity, and roughness; wherein the material and roughness are adjusted by changing different replaceable media (23); Measure and record the adjusted physical parameters to obtain test data; An analytical model was established based on the test data to analyze the influence of the physical parameters on the water-blocking performance of the adhesive.

Images