Underwater glue injection system and underwater glue injection method

Abstract

The invention relates to an underwater glue injection system and an underwater glue injection method. The underwater glue injection system comprises a glue mixing mechanism and a power mechanism, the glue mixing mechanism comprises a pressure barrel, a stirring barrel and a pneumatic stirrer, the stirring barrel is used for containing A glue, and the stirring barrel is provided with a feeding port, a discharging port and an air inlet; the pressure barrel is used for containing B glue and connected with the feeding port, and the pneumatic stirrer is arranged on the stirring barrel. The power mechanism comprises a first gas circuit, a second gas circuit and a third gas circuit which are arranged in parallel, the first gas circuit is connected with the pressure barrel, the second gas circuit is connected with the pneumatic stirrer, and the second gas circuit is used for driving the pneumatic stirrer to move with second gas pressure; and the third gas path is connected with the gas inlet. The underwater glue injection system and the underwater glue injection method can adapt to the underwater operation environment, and automatic glue mixing, glue injection and pressure maintaining work can be achieved.

Description

Technical Field

[0001] The present application relates to the technical field of submarine cable plugging and repair, and in particular to an underwater glue injection system and an underwater glue injection method. Background Art

[0002] Oil-filled submarine cables are submarine cables that use insulating oil as a pressurized fluid, allowing the oil to flow freely within the cable. Damage to an oil-filled cable can cause leakage, contaminating the seawater and impacting the stable operation of the power grid. Therefore, damaged oil-filled submarine cables require repair and sealing.

[0003] When repairing and sealing an oil-filled submarine cable, it is necessary to first place an oil-filled cable sealing and repair device on the leaking section of the cable. Then, a colloid is injected into the device's injection chamber. Once the colloid solidifies, the leak is repaired and sealed. However, current colloid injection systems are generally only suitable for use in dry onshore environments and are not suitable for underwater operations, making them incapable of repairing and sealing oil-filled submarine cables. Summary of the Invention

[0004] Based on this, it is necessary to provide an underwater glue injection system and an underwater glue injection method, which can adapt to the underwater working environment and can realize automatic glue mixing, glue injection and pressure maintenance.

[0005] In a first aspect, the present application provides an underwater glue injection system, comprising:

[0006] A glue mixing mechanism, comprising a pressure barrel, a stirring barrel, and a pneumatic stirrer. The stirring barrel is used to contain glue A and is provided with a feed port, a discharge port, and an air inlet. The pressure barrel is used to contain glue B and is connected to the feed port. The pneumatic stirrer is provided in the stirring barrel.

[0007] A power mechanism, which includes a first air circuit, a second air circuit and a third air circuit arranged in parallel, wherein the first air circuit is connected to the pressure barrel, and the first air circuit is used to drive the B glue in the pressure barrel into the mixing barrel with a first air pressure; the second air circuit is connected to the pneumatic agitator, and the second air circuit is used to drive the pneumatic agitator to move with a second air pressure to mix the A glue and the B glue in the mixing barrel to form a composite glue; the third air circuit is connected to the air inlet, and the third air circuit is used to drive the composite glue in the mixing barrel to be discharged from the discharge port with a third air pressure.

[0008] The technical solution is further described below:

[0009] In one embodiment, there are at least two glue mixing mechanisms, the pressure barrels of all the glue mixing mechanisms are connected in parallel to the first air circuit, the pneumatic agitators of all the glue mixing mechanisms are connected in parallel to the second air circuit; and the air inlets of the stirring barrels of all the glue mixing mechanisms are connected in parallel to the third air circuit.

[0010] In one embodiment, the power mechanism also includes an air source, the first air path, the second air path and the third air path are all connected to the air source, the first air path is provided with a first pressure reducing valve, the second air path is provided with a second pressure reducing valve, and the third air path is provided with a third pressure reducing valve.

[0011] In one embodiment, the first air pressure is 0.2 MPa-0.4 MPa; the second air pressure is 0.5 MPa-1 MPa; and the third air pressure is 0.4 MPa-0.6 MPa.

[0012] In one embodiment, the mixing barrel is further provided with a pressure relief port, and the pressure relief port is connected to a pressure relief valve.

[0013] In one embodiment, the pressure tank and the mixing tank are both made of stainless steel.

[0014] In one embodiment, the number of the mixing mechanisms is two, and the two mixing mechanisms are:

[0015] a first glue mixing mechanism, the first glue mixing mechanism comprising a first pressure barrel, a first stirring barrel and a first pneumatic agitator, the first pressure barrel being connected to the first air circuit, and a first valve being provided between the first pressure barrel and the first air circuit; the first stirring barrel being provided with a first feed port, a first discharge port and a first air inlet, the first feed port being connected to the first pressure barrel, a second valve being provided between the first feed port and the first pressure barrel, and a third valve being provided at the first discharge port; the first air inlet being connected to the third air circuit, a fourth valve being provided between the first air inlet and the third air circuit; the first pneumatic agitator being connected to the second air circuit, and a fifth valve being provided between the first pneumatic agitator and the second air circuit;

[0016] The second glue mixing mechanism includes a second pressure barrel, a second stirring barrel and a second pneumatic agitator. The second pressure barrel is connected to the first air circuit, and a sixth valve is provided between the second pressure barrel and the first air circuit; the second stirring barrel is provided with a second feed port, a second discharge port and a second air inlet. The second feed port is connected to the second pressure barrel, a seventh valve is provided between the second feed port and the second pressure barrel, and an eighth valve is provided at the second discharge port; the second air inlet is connected to the third air circuit, and a ninth valve is provided between the second air inlet and the third air circuit; the second pneumatic agitator is connected to the second air circuit, and a tenth valve is provided between the second pneumatic agitator and the second air circuit.

[0017] In a second aspect, the present application provides an underwater glue injection method, which is implemented using the above-mentioned underwater glue injection system and includes the following steps:

[0018] Pre-loading the first glue A into the first mixing barrel, and pre-loading the first glue B into the first pressure barrel;

[0019] Pre-loading the second glue A into the second mixing barrel, and pre-loading the second glue B into the second pressure barrel;

[0020] The underwater glue injection system is placed in water, and the first discharge port and the second discharge port are connected in parallel to the glue injection port of the oil-filled submarine cable plugging and repairing device, wherein the glue injection port of the oil-filled submarine cable plugging and repairing device is provided with an eleventh valve, and the glue outlet of the oil-filled submarine cable plugging and repairing device is provided with a twelfth valve, and the glue injection port is located below the glue outlet;

[0021] Opening the first valve and the second valve so that the first gas line drives the first glue B in the first pressure tank into the first mixing tank at a first gas pressure;

[0022] Close the first valve and the second valve, and open the fifth valve, so that the first pneumatic stirrer mixes the first glue A and the first glue B in the first mixing barrel to form a first composite glue;

[0023] closing the fifth valve, and sequentially opening the twelfth valve, the fourth valve, the third valve, and the eleventh valve, so that the third air path drives the first composite glue to be injected into the glue injection cavity of the oil-filled submarine cable plugging and repairing device at the third air pressure;

[0024] When the first composite rubber flows out of the rubber outlet, closing the twelfth valve;

[0025] After the third air path maintains the pressure of the glue injection cavity for a first period of time, the fourth valve and the third valve are closed;

[0026] Opening the sixth valve and the seventh valve so that the first air passage drives the second B glue in the second pressure tank into the second mixing tank at the first air pressure;

[0027] Close the sixth valve and the seventh valve, and open the tenth valve, so that the second pneumatic stirrer mixes the second glue A and the second glue B in the second mixing barrel to form a second composite glue;

[0028] Close the tenth valve, and open the twelfth valve, the ninth valve, and the eighth valve in sequence, so that the third air path drives the second composite glue to be injected into the glue injection cavity of the oil-filled submarine cable plugging and repairing device at the third air pressure;

[0029] When the second composite rubber flows out of the rubber outlet, closing the twelfth valve;

[0030] After the third air path maintains the pressure of the glue injection cavity for the first period of time, the eighth valve, the ninth valve, and the eleventh valve are closed;

[0031] The connection between the first discharge port, the second discharge port and the glue injection port is released, and the underwater glue injection system is hoisted ashore.

[0032] In one embodiment, the first composite adhesive is fluorosilicone rubber, organic silica gel or polyurethane adhesive; and / or the second composite adhesive is fluorosilicone rubber or silicone rubber.

[0033] In one embodiment, the first time period is 1 min-3 min.

[0034] In the above-mentioned underwater glue injection system and underwater glue injection method, glue A is pre-loaded into a mixing barrel, glue B is pre-loaded into a pressure barrel, and then the underwater glue injection system as a whole is placed in water. The discharge port of the mixing barrel is connected to the glue injection port of the oil-filled submarine cable sealing and repairing device. Then, the first air circuit is used to drive the glue B in the pressure barrel into the mixing barrel with a first air pressure; the second air circuit then drives the pneumatic agitator to move with a second air pressure to mix the glue A and glue B in the mixing barrel to form a composite glue; finally, the third air circuit drives the composite glue in the mixing barrel through the discharge port and is injected into the glue injection cavity of the oil-filled submarine cable sealing and repairing device with a third air pressure. At the same time, the third air circuit can also be used to maintain the pressure of the glue injection cavity of the oil-filled submarine cable sealing and repairing device, thereby realizing underwater glue mixing, glue injection and pressure maintenance, and can cooperate with the oil-filled submarine cable sealing and repairing device to complete the sealing and repair of the oil-filled submarine cable. Compared with traditional electric or manually driven glue injection systems, the underwater glue injection system of the present application adopts pneumatic drive, so there is no risk of leakage and it can be used in underwater environments. The pneumatic drive can automatically mix glue, inject glue and maintain pressure at a stable preset pressure, which can better adapt to the oil-filled submarine cable sealing and repair device, reduce labor costs and improve glue injection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The drawings that constitute a part of this application are used to provide further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute improper limitations on this application.

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0037] In addition, the drawings are not drawn to a 1:1 scale, and the relative sizes of the various elements are drawn only for illustrative purposes and are not necessarily drawn to true scale.

[0038] Figure 1 Schematic diagram of the structure of an underwater glue injection system according to an embodiment.

[0039] Figure 2 This is a schematic structural diagram of an underwater glue injection system according to another embodiment.

[0040] 10. Power mechanism; 11. First air circuit; 111. First pressure reducing valve; 12. Second air circuit; 121. Second pressure reducing valve; 13. Third air circuit; 131. Third pressure reducing valve; 14. Air source; 20. Glue mixing mechanism; 21. Pressure drum; 22. Stirring drum; 221. Feed port; 222. Discharge port; 223. Air inlet; 224. Pressure relief port; 225. Pressure relief valve; 23. Pneumatic agitator; 20', First glue mixing mechanism; 21', First pressure drum; 22', First stirring drum; 221', First feed port; 222', First discharge port; 223', First air inlet; 23', First pneumatic agitator; 20 '', second glue mixing mechanism; 21'', second pressure barrel; 22'', second stirring barrel; 221'', second feed port; 222'', second feed port; 223'', second air inlet; 23'', second pneumatic agitator; 30, oil-filled submarine cable plugging and repairing device; 31, glue injection chamber; 32, glue injection port; 33, glue outlet; 41, first valve; 42, second valve; 43, third valve; 44, fourth valve; 45, fifth valve; 46, sixth valve; 47, seventh valve; 48, eighth valve; 49, ninth valve; 410, tenth valve; 411, eleventh valve; 412, twelfth valve. DETAILED DESCRIPTION

[0041] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0042] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0043] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0044] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0045] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0046] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0047] Specifically, the glue injection system for the oil-filled submarine cable plugging and repairing device 30 needs to meet at least two conditions, one is that it can adapt to the underwater working environment, and the other is that it can provide stable glue injection pressure. The current glue injection system generally includes electric drive and manual drive, among which the electric drive glue injection system has the risk of leakage and cannot be used in an underwater environment. The manually driven glue injection system cannot provide stable glue injection pressure, cannot be used in conjunction with the oil-filled submarine cable plugging and repairing device 30, and consumes the physical strength of the staff and has low efficiency. Therefore, the current electric drive and manual drive glue injection systems are unable to complete the glue injection work of the oil-filled submarine cable plugging and repairing device 30 well. In addition, the glue used for repairing and sealing the oil-filled submarine cable needs to be a composite glue formed by mixing glue A and glue B. Therefore, the glue injection system for the oil-filled submarine cable plugging and repairing device 30 also needs to meet the function of mixing glue underwater.

[0048] Based on this, an embodiment of the present application provides an underwater glue injection system, which can be used to inject glue into the oil-filled submarine cable plugging and repairing device 30, and can also be used in other underwater glue injection scenarios, which are not limited here. Figure 1 An underwater glue injection system of one embodiment includes a glue mixing mechanism 20 and a power mechanism 10, wherein the glue mixing mechanism 20 includes a pressure barrel 21, a stirring barrel 22 and a pneumatic stirrer 23, the stirring barrel 22 is used to contain glue A, and the stirring barrel 22 is provided with a feed port 221, a discharge port 222 and an air inlet 223; the pressure barrel 21 is used to contain glue B, the pressure barrel 21 is connected to the feed port 221, and the pneumatic stirrer 23 is arranged in the stirring barrel 22. The power mechanism 10 includes a first air circuit 11, a second air circuit 12 and a third air circuit 13 arranged in parallel. The first air circuit 11 is connected to the pressure barrel 21, and the first air circuit 11 is used to drive the B glue in the pressure barrel 21 into the mixing barrel 22 with a first air pressure; the second air circuit 12 is connected to the pneumatic agitator 23, and the second air circuit 12 is used to drive the pneumatic agitator 23 to move with a second air pressure to mix the A glue and the B glue in the mixing barrel 22 to form a composite glue; the third air circuit 13 is connected to the air inlet 223, and the third air circuit 13 is used to drive the composite glue in the mixing barrel 22 to be discharged from the discharge port 222 with a third air pressure.

[0049] When the above-mentioned underwater glue injection system is in use, glue A can be pre-loaded into the mixing barrel 22, glue B can be pre-loaded into the pressure barrel 21, and then the underwater glue injection system as a whole can be placed in water. Then, the discharge port 222 of the mixing barrel 22 is connected to the glue injection port 32 of the oil-filled submarine cable sealing and repairing device 30, and then the first air path 11 is used to drive the glue B in the pressure barrel 21 into the mixing barrel 22 with the first air pressure; the second air path 12 then drives the pneumatic stirrer 23 to move with the second air pressure to mix the mixing barrel 22. 2 is mixed with glue B to form composite glue; finally, the third air path 13 drives the composite glue in the mixing barrel 22 with the third air pressure to be injected into the glue injection cavity 31 of the oil-filled submarine cable plugging and repairing device 30 through the discharge port 222. At the same time, the third air path 13 can also be used to maintain the pressure of the glue injection cavity 31 of the oil-filled submarine cable plugging and repairing device 30, thereby realizing the mixing, injection and pressure maintenance work underwater, and can cooperate with the oil-filled submarine cable plugging and repairing device 30 to complete the plugging and repair of the oil-filled submarine cable. Compared with traditional electric or manually driven glue injection systems, the underwater glue injection system of the present application adopts pneumatic drive, so there is no risk of leakage, and it can be applied to underwater environments. The pneumatic drive can automatically mix glue, inject glue and maintain pressure at a stable preset pressure, which can better adapt to the oil-filled submarine cable plugging and repairing device 30, reduce labor costs, and improve glue injection efficiency.

[0050] Alternatively, see Figure 1 In one embodiment, the power mechanism 10 further includes an air source 14, and the first air path 11, the second air path 12, and the third air path 13 are all connected to the air source 14. The first air path 11 is provided with a first pressure reducing valve 111, and the first pressure reducing valve 111 is used to regulate the air pressure output by the first air path 11. The second air path 12 is provided with a second pressure reducing valve 121, and the second pressure reducing valve 121 is used to regulate the air pressure output by the second air path 12. The third air path 13 is provided with a third pressure reducing valve 131, and the third pressure reducing valve 131 is used to regulate the air pressure output by the third air path 13. By regulating the air pressure output by different air paths respectively through different pressure reducing valves, it is ensured that the underwater glue injection system can perform glue mixing, glue injection, and pressure maintenance operations at different predetermined air pressures, which is convenient to control and simple to operate. It is worth mentioning that in other embodiments, the air pressures of the first air path 11, the second air path 12, and the third air path 13 can also be controlled separately by a pressure reducing valve, which is not limited here.

[0051] Optionally, in one embodiment, the first air pressure is 0.2Mpa-0.4Mpa, that is, the air pressure output by the first air path 11 is 0.2Mpa-0.4Mpa. For example, the first air pressure can be 0.2Mpa, 0.25Mpa, 0.3Mpa, 0.35Mpa, or 0.4Mpa. Specifically, if the first air pressure is too low, the first air path 11 cannot inject the B glue from the pressure barrel 21 into the mixing barrel 22. If the first air pressure is too high, it is easy to exceed the safe pressure range of the pressure barrel 21 and increase costs. By configuring the first air pressure range to 0.2Mpa-0.4Mpa, it is ensured that the glue can be smoothly injected into the mixing barrel 22 at a lower cost.

[0052] In one embodiment, the second air pressure is 0.5 MPa-1 MPa. For example, the second air pressure can be 0.5 MPa, 0.6 MPa, 0.7 MPa, 0.8 MPa, 0.9 MPa, or 0.1 MPa. If the second air pressure is too low, the pneumatic stirrer 23 will not be able to mix the glue A and the glue B evenly. If the second air pressure is too high, the pneumatic stirrer 23 may be damaged. By configuring the second air pressure range to 0.5 MPa-1 MPa, the pneumatic stirrer 23 can be safely used while ensuring that the glue A and the glue B are mixed evenly.

[0053] In one embodiment, the third air pressure is 0.4Mpa-0.6Mpa. For example, the third air pressure can be 0.4Mpa, 0.45Mpa, 0.5Mpa, 0.55Mpa, or 0.6Mpa. Specifically, if the third air pressure is too low, the third air path 13 cannot inject the composite glue from the mixing barrel 22 into the glue injection cavity 31 of the oil-filled submarine cable and maintain pressure. If the third air pressure is too high, it is easy to exceed the safe pressure range of the mixing barrel 22 and increase costs. By configuring the third air pressure range to 0.4Mpa-0.6Mpa, it is ensured that the glue can be smoothly injected into the glue injection cavity 31 of the oil-filled submarine cable plugging and repairing device 30 and maintain pressure within the safe pressure range of the mixing barrel 22.

[0054] Optionally, in one embodiment, the mixing barrel 22 is further provided with a pressure relief port 224, which is connected to a pressure relief valve 225. Specifically, the pressure relief valve 225 is used to open or close the pressure relief port 224, which is used to release the air pressure within the mixing barrel 22. Specifically, while the first air path 11 is driving the B glue in the pressure barrel 21 into the mixing barrel 22, the pressure relief valve 225 can be opened to prevent the air pressure within the mixing barrel 22 from hindering the injection of the B glue.

[0055] Optionally, in one embodiment, both the pressure tank 21 and the mixing tank 22 are made of stainless steel. Stainless steel is strong and corrosion-resistant, effectively resisting seabed water pressure and seawater erosion, thereby extending the service life of the underwater injection system. Furthermore, in one embodiment, the connecting pipes between the various mechanisms of the underwater injection system are made of polyurethane (PU) to ensure that the connecting pipes can withstand seawater pressure and corrosion.

[0056] In one embodiment, there are at least two glue mixing mechanisms 20. The pressure barrels 21 of all glue mixing mechanisms 20 are connected in parallel to the first air path 11, and the pneumatic agitators 23 of all glue mixing mechanisms 20 are connected in parallel to the second air path 12. The air inlets 223 of the stirring barrels 22 of all glue mixing mechanisms 20 are connected in parallel to the third air path 13. In this way, different glue mixing mechanisms 20 can mix glue to form different composite glues. Each glue mixing mechanism 20 then sequentially injects the different composite glues into the glue injection cavity 31 of the oil-filled submarine cable plugging and repair device 30, meeting the use scenario where multiple composite glues are required for plugging and repair.

[0057] Specifically, see Figure 2 In one embodiment, there are two glue mixing mechanisms 20 , and the two glue mixing mechanisms 20 are respectively a first glue mixing mechanism 20 ′ and a second glue mixing mechanism 20 ″.

[0058] The first mixing mechanism 20' includes a first pressure tank 21', a first stirring tank 22', and a first pneumatic agitator 23'. The first pressure tank 21' is connected to the first air circuit 11, and a first valve 41 is provided between the first pressure tank 21' and the first air circuit 11. The first stirring tank 22' is provided with a first feed port 221', a first discharge port 222', and a first air inlet 223'. The first feed port 221' is connected to the first pressure tank 21', a second valve 42 is provided between the first feed port 221' and the first pressure tank 21', and a third valve 43 is provided at the first discharge port 222'. The first air inlet 223' is connected to the third air circuit 13, and a fourth valve 44 is provided between the first air inlet 223' and the third air circuit 13. The first pneumatic agitator 23' is connected to the second air circuit 12, and a fifth valve 45 is provided between the first pneumatic agitator 23' and the second air circuit 12.

[0059] The second glue mixing mechanism 20'' includes a second pressure tank 21'', a second stirring tank 22'' and a second pneumatic stirrer 23''. The second pressure tank 21'' is connected to the first gas line 11, and a sixth valve 46 is provided between the second pressure tank 21'' and the first gas line 11; the second stirring tank 22'' is provided with a second feed port 221'', a second discharge port 222'' and a second air inlet 223''. The second feed port 221'' is connected to the second pressure tank 21 '' is connected, a seventh valve 47 is provided between the second feed port 221'' and the second pressure barrel 21'', and an eighth valve 48 is provided at the second discharge port 222''; the second air inlet 223'' is connected to the third air path 13, and a ninth valve 49 is provided between the second air inlet 223'' and the third air path 13; the second pneumatic agitator 23'' is connected to the second air path 12, and a tenth valve 410 is provided between the second pneumatic agitator 23'' and the second air path 12.

[0060] Furthermore, the first glue mixing mechanism 20' is used to mix high-permeability glue A with high-permeability glue B to form a high-permeability composite glue, and the second glue mixing mechanism 20" is used to mix low-permeability glue A with low-permeability glue B to form a low-permeability composite glue. In one embodiment, during glue injection, the first glue mixing mechanism 20' can mix the glue to form a high-permeability composite glue and inject it into the glue injection cavity 31. The second glue mixing mechanism 20" can then mix the glue to form a low-permeability composite glue and inject it into the glue injection cavity 31, thereby replacing the high-permeability composite glue in the glue injection cavity 31 with the low-permeability composite glue.

[0061] Specifically, high-permeability composite glue is a sealant with low viscosity that can penetrate deep into tiny gaps and achieve the purpose of sealing and leak prevention after solidification. Low-permeability composite glue is a material with excellent elasticity and flexibility. Low-permeability composite glue is not easy to enter tiny gaps, but has filling and pressure-maintaining functions, and can balance the pressure of the insulating oil leaking from the oil-filled submarine cable. By first injecting high-permeability composite glue into the glue injection cavity 31 and maintaining the pressure for a certain time, and then injecting low-permeability composite glue to replace the high-permeability composite glue and maintaining the pressure for a certain time, the high-permeability composite glue injected first can more easily penetrate into the gaps between the layers of the oil-filled submarine cable. After using the low-permeability composite glue to replace the high-permeability composite glue, the low-permeability composite glue can balance the pressure of the insulating oil leaking from the oil-filled submarine cable, and at the same time prevent the cured high-permeability composite glue from being squeezed out of the gaps between the layers. This further improves the sealing and repair effect.

[0062] Furthermore, an embodiment of the present application also provides an underwater glue injection method, which is implemented using the above-mentioned underwater glue injection system. Figure 2 The underwater glue injection method of one embodiment includes the following steps:

[0063] S11: Pre-load the first glue A into the first mixing barrel 22', and pre-load the first glue B into the first pressure barrel 21';

[0064] Specifically, the first A glue may be a high-permeability A glue, and the first B glue may be a high-permeability B glue.

[0065] S12: Pre-load the second glue A into the second mixing barrel 22'', and pre-load the second glue B into the second pressure barrel 21'';

[0066] Specifically, the second A glue may be low-permeability A glue, and the second B glue may be low-permeability B glue.

[0067] S13: placing the underwater glue injection system into water, and connecting the first discharge port 222' and the second discharge port 222" in parallel to the glue injection port 32 of the oil-filled submarine cable plugging and repairing device 30, wherein the glue injection port 32 of the oil-filled submarine cable plugging and repairing device 30 is provided with an eleventh valve 411, and the glue outlet 33 of the oil-filled submarine cable plugging and repairing device 30 is provided with a twelfth valve 412, and the glue injection port 32 is located below the glue outlet 33;

[0068] Specifically, the first discharge port 222' and the second discharge port 222" can be connected in parallel to the glue injection port 32 via a tee pipe. The glue injection port 32 of the oil-filled submarine cable plugging and repairing device 30 is located below the glue outlet 33. During glue injection, glue can be injected into the glue injection cavity 31 from the bottom up. Since the density of the composite glue is greater than that of seawater, injecting glue from the bottom up can ensure that the composite glue fills the glue injection cavity 31.

[0069] S14: Open the first valve 41 and the second valve 42 so that the first gas line 11 drives the first B glue in the first pressure tank 21' into the first mixing tank 22' with the first gas pressure.

[0070] Exemplarily, the first air pressure is 0.2 MPa-0.4 MPa.

[0071] S15: Close the first valve 41 and the second valve 42, and open the fifth valve 45, so that the first pneumatic stirrer 23' mixes the first glue A and the first glue B in the first mixing barrel 22' to form a first composite glue;

[0072] Specifically, the first composite adhesive can be a high-permeability composite adhesive, such as fluorosilicone rubber, organic silicone rubber, or polyurethane adhesive. High-permeability composite adhesives have good permeability, meaning low viscosity. They cure quickly after mixing, exhibit moderate hardness, and possess a certain degree of flexibility and strength. They can penetrate into the tiny gaps of oil-filled submarine cables and achieve a leak-proof seal after curing.

[0073] S16: Close the fifth valve 45, and sequentially open the twelfth valve 412, the fourth valve 44, the third valve 43, and the eleventh valve 411, so that the third air passage 13 drives the first composite adhesive to be injected into the adhesive injection cavity 31 of the oil-filled submarine cable plugging and repairing device 30 at the third air pressure;

[0074] S17: When the first composite glue flows out from the glue outlet 33, the twelfth valve 412 is closed;

[0075] Specifically, when the first composite glue continues to flow out of the glue outlet 33 for 10s-15s, it indicates that the glue injection cavity 31 is filled with the first composite glue, and the twelfth valve 412 can be closed at this time.

[0076] S18: After the third gas path 13 maintains the pressure in the glue injection cavity 31 for a first period of time, the fourth valve 44 and the third valve 43 are closed;

[0077] Specifically, after closing valve 412, row 12, the third air path 13 maintains pressure in the glue injection cavity 31 for a period of time. This ensures that the first composite adhesive fully penetrates the gaps in the oil-filled submarine cable, preventing axial leakage of insulating oil along the gaps between the copper bars in the oil-filled submarine cable's armor layer and between the armor layer and the PE layer. Exemplarily, the third air path 13 maintains pressure in the glue injection cavity 31 at a pressure of 0.5 MPa to 1 MPa. The first period of pressure maintenance is 1 to 3 minutes.

[0078] Furthermore, during the period when the third gas path 13 maintains the pressure of the glue injection cavity 31 , the following steps S19 - S20 may be executed synchronously to improve the glue injection efficiency.

[0079] S19: Open the sixth valve 46 and the seventh valve 47 so that the first air passage 11 drives the second B glue in the second pressure tank 21 ″ into the second mixing tank 22 ″ at the first air pressure;

[0080] S20: Close the sixth valve 46 and the seventh valve 47, and open the tenth valve 410, so that the second pneumatic stirrer 23" mixes the second glue A and the second glue B in the second mixing barrel 22" to form a second composite glue;

[0081] Specifically, the second composite adhesive can be a low-permeability composite adhesive, such as fluorosilicone rubber or silicone rubber. Low-permeability composite adhesives are materials with excellent elasticity and flexibility. While they are less likely to enter tiny gaps, they provide a filling and pressure-maintaining function, balancing the pressure of leaking insulating oil from oil-filled submarine cables. Furthermore, they prevent the cured high-permeability composite adhesive from squeezing out of gaps between layers, further enhancing the sealing and repair effectiveness.

[0082] S21: Close the tenth valve 410, and open the twelfth valve 412, the ninth valve 49, and the eighth valve 48 in sequence, so that the third air passage 13 drives the second composite adhesive to be injected into the adhesive injection cavity 31 of the oil-filled submarine cable plugging and repairing device 30 at the third air pressure;

[0083] S22: When the second composite glue flows out from the glue outlet 33, the twelfth valve 412 is closed;

[0084] Specifically, when the second compound glue continues to flow out of the glue outlet 33 for 10s-15s, it indicates that the first compound glue in the glue injection cavity 31 has been completely replaced by the second compound glue, and the twelfth valve 412 can be closed at this time.

[0085] S23: After the third gas path 13 maintains the pressure in the glue injection cavity 31 for a first period of time, the eighth valve 48, the ninth valve 49 and the eleventh valve 411 are closed;

[0086] Specifically, after closing valve row 12 412, the third air path 13 maintains pressure in the glue injection cavity 31 for a period of time. This ensures that after the second composite adhesive cures, the cavity 31 maintains a high internal pressure. This balances the pressure of insulating oil leaking from the oil-filled submarine cable and prevents the cured, highly permeable composite adhesive from being squeezed out of the gaps between layers, thereby improving the sealing effect. For example, the third air path 13 maintains pressure in the glue injection cavity 31 at 0.5 MPa to 1 MPa. The first period of pressure maintenance is 1 to 3 minutes.

[0087] S24: Release the connection between the first discharge port 222', the second discharge port 222" and the glue injection port 32, and hoist the underwater glue injection system ashore.

[0088] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0089] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. An underwater glue injection system, characterized in that: include: A glue mixing mechanism, comprising a pressure barrel, a stirring barrel, and a pneumatic stirrer. The stirring barrel is used to contain glue A and is provided with a feed port, a discharge port, and an air inlet. The pressure barrel is used to contain glue B and is connected to the feed port. The pneumatic stirrer is provided in the stirring barrel. A power mechanism, which includes a first air circuit, a second air circuit and a third air circuit arranged in parallel, wherein the first air circuit is connected to the pressure barrel, and the first air circuit is used to drive the B glue in the pressure barrel into the mixing barrel with a first air pressure; the second air circuit is connected to the pneumatic agitator, and the second air circuit is used to drive the pneumatic agitator to move with a second air pressure to mix the A glue and the B glue in the mixing barrel to form a composite glue; the third air circuit is connected to the air inlet, and the third air circuit is used to drive the composite glue in the mixing barrel to be discharged from the discharge port with a third air pressure.

2. The underwater glue injection system according to claim 1, characterized in that: There are at least two glue mixing mechanisms, the pressure barrels of all the glue mixing mechanisms are connected to the first air circuit in parallel, the pneumatic agitators of all the glue mixing mechanisms are connected to the second air circuit in parallel; and the air inlets of the stirring barrels of all the glue mixing mechanisms are connected to the third air circuit in parallel.

3. The underwater glue injection system according to claim 1, characterized in that: The power mechanism also includes an air source, the first air path, the second air path and the third air path are all connected to the air source, the first air path is provided with a first pressure reducing valve, the second air path is provided with a second pressure reducing valve, and the third air path is provided with a third pressure reducing valve.

4. The underwater glue injection system according to claim 1, characterized in that: The first air pressure is 0.2Mpa-0.4Mpa; the second air pressure is 0.5Mpa-1Mpa; and the third air pressure is 0.4Mpa-0.6Mpa.

5. The underwater glue injection system according to claim 1, characterized in that: The mixing barrel is further provided with a pressure relief port, and the pressure relief port is connected to a pressure relief valve.

6. The underwater glue injection system according to claim 1, characterized in that: The pressure barrel and the mixing barrel are both made of stainless steel.

7. The underwater glue injection system according to any one of claims 1 to 6, characterized in that: There are two mixing mechanisms, and the two mixing mechanisms are: a first glue mixing mechanism, the first glue mixing mechanism comprising a first pressure barrel, a first stirring barrel and a first pneumatic agitator, the first pressure barrel being connected to the first air circuit, and a first valve being provided between the first pressure barrel and the first air circuit; the first stirring barrel being provided with a first feed port, a first discharge port and a first air inlet, the first feed port being connected to the first pressure barrel, a second valve being provided between the first feed port and the first pressure barrel, and a third valve being provided at the first discharge port; the first air inlet being connected to the third air circuit, a fourth valve being provided between the first air inlet and the third air circuit; the first pneumatic agitator being connected to the second air circuit, and a fifth valve being provided between the first pneumatic agitator and the second air circuit; The second glue mixing mechanism includes a second pressure barrel, a second stirring barrel and a second pneumatic agitator. The second pressure barrel is connected to the first air circuit, and a sixth valve is provided between the second pressure barrel and the first air circuit; the second stirring barrel is provided with a second feed port, a second discharge port and a second air inlet. The second feed port is connected to the second pressure barrel, a seventh valve is provided between the second feed port and the second pressure barrel, and an eighth valve is provided at the second discharge port; the second air inlet is connected to the third air circuit, and a ninth valve is provided between the second air inlet and the third air circuit; the second pneumatic agitator is connected to the second air circuit, and a tenth valve is provided between the second pneumatic agitator and the second air circuit.

8. An underwater glue injection method, implemented using the underwater glue injection system according to claim 7, characterized in that: The following steps are involved: Pre-loading the first glue A into the first mixing barrel, and pre-loading the first glue B into the first pressure barrel; Pre-loading the second glue A into the second mixing barrel, and pre-loading the second glue B into the second pressure barrel; The underwater glue injection system is placed in water, and the first discharge port and the second discharge port are connected in parallel to the glue injection port of the oil-filled submarine cable plugging and repairing device, wherein the glue injection port of the oil-filled submarine cable plugging and repairing device is provided with an eleventh valve, and the glue outlet of the oil-filled submarine cable plugging and repairing device is provided with a twelfth valve, and the glue injection port is located below the glue outlet; Opening the first valve and the second valve so that the first gas line drives the first glue B in the first pressure tank into the first mixing tank at a first gas pressure; Close the first valve and the second valve, and open the fifth valve, so that the first pneumatic stirrer mixes the first glue A and the first glue B in the first mixing barrel to form a first composite glue; closing the fifth valve, and sequentially opening the twelfth valve, the fourth valve, the third valve, and the eleventh valve, so that the third air path drives the first composite glue to be injected into the glue injection cavity of the oil-filled submarine cable plugging and repairing device at the third air pressure; When the first composite rubber flows out of the rubber outlet, closing the twelfth valve; After the third air path maintains the pressure of the glue injection cavity for a first period of time, the fourth valve and the third valve are closed; Opening the sixth valve and the seventh valve so that the first air passage drives the second B glue in the second pressure tank into the second mixing tank at the first air pressure; Close the sixth valve and the seventh valve, and open the tenth valve, so that the second pneumatic stirrer mixes the second glue A and the second glue B in the second mixing barrel to form a second composite glue; Close the tenth valve, and open the twelfth valve, the ninth valve, and the eighth valve in sequence, so that the third air path drives the second composite glue to be injected into the glue injection cavity of the oil-filled submarine cable plugging and repairing device at the third air pressure; When the second composite rubber flows out of the rubber outlet, closing the twelfth valve; After the third air path maintains the pressure of the glue injection cavity for the first period of time, the eighth valve, the ninth valve, and the eleventh valve are closed; The connection between the first discharge port, the second discharge port and the glue injection port is released, and the underwater glue injection system is hoisted ashore.

9. The underwater glue injection method according to claim 8, characterized in that: The first composite adhesive is fluorosilicone rubber, organic silica gel or polyurethane adhesive; and / or the second composite adhesive is fluorosilicone rubber or silicone rubber.

10. The underwater glue injection method according to claim 8, characterized in that: The first time period is 1 min to 3 min.

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