阅读说明：本技术 锚地岸电10kv异种电缆水下接头及其制备方法 (Anchor land shore power 10KV dissimilar cable underwater connector and preparation method thereof ) 是由 陈辉 曾灿林 姚琼 张磊 徐玉刚 潘雄文 宋先勇 张绍斌 蒲贞洪 王勇 于 2021-06-30 设计创作，主要内容包括：本发明公开了一种锚地岸电10KV异种电缆水下接头,包括支撑座、内壳体、外壳体、防弯装置、支撑装置、第一电缆和第二电缆,第一电缆的导线和第二电缆的对应连接形成连接部,内壳体套设于第一电缆和第二电缆上,连接部位于内壳体中,内壳体上设有第一注胶孔,外壳体包括第一半壳套和第二半壳套,第一半壳套和第二半壳套可拆卸连接,第一半壳套和/或第二半壳套上设有第二注胶孔,内壳体位于外壳体内,内壳体和外壳体内充填有防水密封胶。还公开了一种锚地岸电10KV异种电缆水下接头的制备方法,包括：穿电缆；接导线及安装内壳体；内壳体注胶；安装外壳体；外壳体注胶。本锚地岸电10KV异种电缆水下接头及其制备方法施工方便、密封性好以及耐压性好。(The invention discloses an anchor land shore power 10KV heterogeneous cable underwater joint which comprises a supporting seat, an inner shell, an outer shell, an anti-bending device, a supporting device, a first cable and a second cable, wherein a lead of the first cable and the second cable are correspondingly connected to form a connecting part, the inner shell is sleeved on the first cable and the second cable, the connecting part is positioned in the inner shell, a first glue injection hole is formed in the inner shell, the outer shell comprises a first half shell sleeve and a second half shell sleeve, the first half shell sleeve and the second half shell sleeve are detachably connected, a second glue injection hole is formed in the first half shell sleeve and/or the second half shell sleeve, the inner shell is positioned in the outer shell, and waterproof sealant is filled in the inner shell and the outer shell. Also discloses a preparation method of the underwater joint of the anchor land shore power 10KV dissimilar cable, which comprises the following steps: threading a cable; connecting wires and installing an inner shell; injecting glue into the inner shell; installing an outer shell; and (5) injecting glue into the outer shell. The anchor land shore power 10KV heterogeneous cable underwater connector and the preparation method thereof have the advantages of convenience in construction, good sealing property and good pressure resistance.)

1. An anchor land shore power 10KV dissimilar cable underwater connector is characterized in that: comprises a supporting seat (1), an inner shell (2), an outer shell (3), an anti-bending device (4) and a supporting device (41) which are oppositely arranged on the supporting seat (1), a first cable (5) arranged on the anti-bending device (4) and a second cable (6) arranged on the supporting device (41), wherein the conducting wire of the first cable (5) and the conducting wire of the second cable (6) are correspondingly connected to form a connecting part (7), the two ends of the inner shell (2) are respectively sleeved on the first cable (5) and the second cable (6), the connecting part (7) is positioned in the inner shell (2), a first glue injection hole (21) is arranged on the inner shell (2), the outer shell (3) comprises a first half shell sleeve (31) and a second half shell sleeve (32) which are respectively sleeved on the first cable (5) and the second cable (6), the opposite ends of the first half shell sleeve (31) and the second half shell sleeve (32) are detachably connected, be equipped with second injecting glue hole (33) on half first shell (31) and/or half second shell (32), interior casing (2) are located shell body (3), be filled with waterproof sealed glue (8) in interior casing (2) and shell body (3).

2. The anchor land shore power 10KV dissimilar cable underwater joint according to claim 1, characterized in that: the first half shell sleeve (31) and the second half shell sleeve (32) are provided with pressing sleeves (9) at the sleeve joint parts with the corresponding cables, and elastic sealing sleeves (91) are arranged between the pressing sleeves (9) and the corresponding cables.

3. The anchor land shore power 10KV dissimilar cable underwater joint according to claim 2, characterized in that: the outer end of the elastic sealing sleeve (91) is provided with an annular slot (92), and a clamping sleeve (93) is arranged in the annular slot (92).

4. The anchor land shore power 10KV dissimilar cable underwater joint according to claim 2, characterized in that: the second cable (6) is welded with the corresponding pressing sleeve (9).

5. The anchor land shore power 10KV dissimilar cable underwater joint according to claim 1, characterized in that: the conducting wires of the first cable (5) and the conducting wires of the second cable (6) are welded by heat release.

6. The anchor land shore power 10KV dissimilar cable underwater joint according to claim 1, characterized in that: an insulating layer (71) is arranged outside the connecting part (7).

7. The mooring land power 10KV dissimilar cable underwater connector according to claim 6, wherein: the insulating layer (71) is formed by wrapping a thermoplastic elastomer.

8. The anchor land shore power 10KV dissimilar cable underwater joint according to claim 1, characterized in that: the first half shell sleeve (31) and the second half shell sleeve (32) are fixed on the supporting seat (1) through fixing pieces (94).

9. The mooring land electricity 10KV xenogenous cable underwater joint according to any one of claims 1 to 8, characterized in that: a humidity sensor (95) is arranged in the inner shell (2).

10. A method for preparing the underwater connector of the anchor land electricity 10KV dissimilar cable according to any one of claims 1 to 9, characterized in that: the method comprises the following steps:

s1: cable threading: a first cable (5) and a second cable (6) are respectively penetrated from one outward end of the bending prevention device (4) and the supporting device (41) and respectively extend out from one inward end of the bending prevention device (4) and the supporting device (41);

s2: wire-connecting and mounting inner case (2): sleeving a first half shell sleeve (31) and a second half shell sleeve (32) of an outer shell (3) on a first cable (5) and a second cable (6) respectively, movably sleeving an inner shell (2) on the first cable (5), connecting a lead of the first cable (5) with a lead of the second cable (6), wrapping an insulating layer (71) outside a connecting part (7) of the leads, and then moving the inner shell (2) to enable one end of the inner shell (2) to be sleeved on the first cable (5) and the other end to be sleeved on the second cable (6);

s3: injecting glue into the inner shell (2): the inner shell (2) is filled with waterproof sealant (8) through the first sealant injection hole (21), so that the connecting part (7) of the lead is embedded in the waterproof sealant (8) in the inner shell (2);

s4: mounting the outer shell (3): connecting the inward ends of the first half shell (31) and the second half shell (32), and connecting the outward ends with corresponding cables in a sealing manner;

s5: injecting glue into the outer shell (3): and the outer shell (3) is filled with the waterproof sealant (8) through the second glue injection hole (33), so that the inner shell (2) is embedded in the waterproof sealant (8) in the outer shell (3).

Technical Field

The invention relates to the technical field of cable underwater connectors, in particular to an anchor land shore power 10KV dissimilar cable underwater connector and a preparation method thereof.

Background

The anchor land shore power 10KV dissimilar cable underwater connector needs to connect dissimilar conductors, namely a 2-class conductor (a crosslinked polyethylene insulated split-phase lead-coated thick steel wire armored cable) and a 5-class conductor (a rubber insulated split-phase braided shielding steel wire braided armored cable).

The existing anchor land shore power 10KV heterogeneous cable underwater connector has the following problems:

1. the construction is inconvenient, the sealing performance is poor, and the pressure resistance is poor;

2. because the two cables are different in type, unreliable mechanical and electrical connection is easy to occur if a traditional crimping mode is adopted, and connection looseness at the joint can be caused greatly when an underwater joint moves along with the rise and fall of tide for a long time, so that a series of problems are caused;

3. the insulation of two cables is completely different materials, one is cross-linked polyethylene insulation, the other is ethylene-propylene rubber insulation, the two completely different materials need to be connected in an insulating way and bear the operating voltage, at present, the two materials cannot be really fused into a whole, and even fatal defects of insulation can be caused, so that electrical accidents can occur;

4. the connection mode of the steel wire armor of the submarine cable and the interface box is that the submarine cable steel wire is fixed on the shell of the interface box through a flange plate compression joint method and is locked through bolts, and the submarine cable steel wire is thick and high in hardness, so that the problem that the steel wire is broken easily or the bolts slip threads and the like are caused due to the fact that the submarine cable steel wire is very hard in a flange locking mode.

5. The requirement of inland lake power supply can not be met, and the humidity is difficult to monitor.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide the anchor land electricity 10KV dissimilar cable underwater connector which is convenient to construct, good in sealing performance and good in pressure resistance and the preparation method thereof.

In order to solve the technical problems, the invention adopts the following technical scheme:

an anchor land electricity 10KV dissimilar cable underwater connector comprises a supporting seat, an inner shell, an outer shell, an anti-bending device and a supporting device which are oppositely arranged on the supporting seat, a first cable arranged on the anti-bending device and a second cable arranged on the supporting device, the conducting wires of the first cable and the conducting wires of the second cable are correspondingly connected to form a connecting part, two ends of the inner shell are respectively sleeved on the first cable and the second cable, the connecting part is positioned in the inner shell, the inner shell is provided with a first glue injection hole, the outer shell comprises a first half shell sleeve and a second half shell sleeve which are respectively sleeved on the first cable and the second cable, the opposite ends of the first half shell and the second half shell are detachably connected, a second glue injection hole is arranged on the first half shell and/or the second half shell, the inner shell is positioned in the outer shell, and waterproof sealant is filled in the inner shell and the outer shell.

As a further improvement of the above technical solution:

and the sleeving parts of the first half shell and the second half shell and the corresponding cables are respectively provided with a pressing sleeve, and elastic sealing sleeves are respectively arranged between the pressing sleeves and the corresponding cables.

The outer end of the elastic sealing sleeve is provided with an annular slot, and a clamping sleeve is arranged in the annular slot.

And the second cable is welded with the corresponding pressing sleeve.

And the conducting wire of the first cable and the conducting wire of the second cable are welded by heat release.

An insulating layer is arranged outside the connecting part.

The insulating layer is formed by wrapping a thermoplastic elastomer.

And the first half shell sleeve and the second half shell sleeve are fixed on the supporting seat through fixing pieces.

A humidity sensor is arranged in the inner shell.

The preparation method of the underwater joint for the anchor land shore power 10KV dissimilar cable comprises the following steps:

s1: cable threading: respectively penetrating a first cable and a second cable from one outward end of the bending prevention device and one inward end of the supporting device, and respectively extending out from one inward end of the bending prevention device and one inward end of the supporting device;

s2: wire connection and installation of inner housing: respectively sleeving a first half shell sleeve and a second half shell sleeve of an outer shell on a first cable and a second cable, movably sleeving an inner shell on the first cable, connecting a lead of the first cable with a lead of the second cable, winding an insulating layer outside a connecting part of the leads, and then moving the inner shell to enable one end of the inner shell to be sleeved on the first cable and the other end of the inner shell to be sleeved on the second cable;

s3: injecting glue into the inner shell: the inner shell is filled with waterproof sealant through the first glue injection hole, so that the connecting part of the lead is embedded in the waterproof sealant in the inner shell;

s4: installing an outer shell: connecting the inward ends of the first half shell sleeve and the second half shell sleeve, and hermetically connecting the outward ends with corresponding cables;

s5: injecting glue into the outer shell: and the outer shell is filled with waterproof sealant through the second glue injection hole, so that the inner shell is embedded in the waterproof sealant in the outer shell.

Compared with the prior art, the invention has the advantages that:

according to the underwater connector for the anchor land electricity 10KV heterogeneous cable, the connecting end of the first cable and the second cable is connected through the inner shell and the outer shell, and the inner shell and the outer shell are filled with the waterproof sealant, so that the connecting part is embedded in the waterproof sealant in the inner shell, and the inner shell is embedded in the waterproof sealant in the outer shell, so that good sealing performance and pressure resistance are achieved. The construction process of the anchor land shore power 10KV heterogeneous cable underwater connector comprises the following steps: firstly, respectively penetrating a first cable and a second cable from one outward end of the bending prevention device and the support device, and respectively extending out from one inward end of the bending prevention device and the support device; secondly, respectively sleeving a first half shell sleeve and a second half shell sleeve of the outer shell on a first cable and a second cable, movably sleeving an inner shell on the first cable, connecting a lead of the first cable with a lead of the second cable, wrapping an insulating layer outside a connecting part of the leads, and then moving the inner shell to enable one end of the inner shell to be sleeved on the first cable and the other end of the inner shell to be sleeved on the second cable; then, filling waterproof sealant into the inner shell through the first glue injection hole, so that the connecting part of the lead is embedded in the waterproof sealant in the inner shell; then, connecting the inward ends of the first half shell and the second half shell, and hermetically connecting the outward ends with corresponding cables; and finally, filling the waterproof sealant into the outer shell through the second glue injection hole, so that the inner shell is embedded in the waterproof sealant in the outer shell. The anchor land shore power 10KV heterogeneous cable underwater connector is convenient to construct, good in sealing performance and good in pressure resistance.

The invention discloses a preparation method of an anchor land electricity 10KV dissimilar cable underwater connector, which comprises the following steps: respectively penetrating a first cable and a second cable from one outward end of the bending prevention device and one inward end of the supporting device, and respectively extending out from one inward end of the bending prevention device and one inward end of the supporting device; respectively sleeving a first half shell sleeve and a second half shell sleeve of an outer shell on a first cable and a second cable, movably sleeving an inner shell on the first cable, connecting a lead of the first cable with a lead of the second cable, winding an insulating layer outside a connecting part of the leads, and then moving the inner shell to enable one end of the inner shell to be sleeved on the first cable and the other end of the inner shell to be sleeved on the second cable; the inner shell is filled with waterproof sealant through the first glue injection hole, so that the connecting part of the lead is embedded in the waterproof sealant in the inner shell; connecting the inward ends of the first half shell sleeve and the second half shell sleeve, and hermetically connecting the outward ends with corresponding cables; and the outer shell is filled with waterproof sealant through the second glue injection hole, so that the inner shell is embedded in the waterproof sealant in the outer shell. The preparation method of the anchor land shore power 10KV heterogeneous cable underwater connector is convenient to construct, and improves the sealing property and the pressure resistance through double protection of the inner shell and the outer shell.

Drawings

Fig. 1 is a schematic perspective view of an underwater connector for anchor land shore power 10KV dissimilar cables.

Fig. 2 is a schematic structural view of the underwater connector of the anchor land shore power 10KV dissimilar cable.

Fig. 3 is a schematic sectional structure view of the underwater joint of the anchor land shore power 10KV dissimilar cable.

Fig. 4 is an enlarged view at a in fig. 3.

The reference numerals in the figures denote:

1. a supporting seat; 11. a support block; 2. an inner housing; 21. a first glue injection hole; 3. an outer housing; 31. a first half shell; 32. a second half shell; 33. a second glue injection hole; 34. connecting blocks; 35. a connecting bolt; 4. an anti-bending device; 41. a support device; 5. a first cable; 6. a second cable; 7. a connecting portion; 71. an insulating layer; 8. waterproof sealant; 9. a compression sleeve; 91. an elastic sealing sleeve; 92. an annular slot; 93. a clamping sleeve; 94. a fixing member; 95. a humidity sensor; 96. and (7) lifting lugs.

Detailed Description

The invention will be described in further detail below with reference to the drawings and specific examples.

The first embodiment is as follows:

fig. 1 to 4 show an embodiment of an underwater joint for anchor-land shore power 10KV heterogeneous cables according to the present invention, which includes a supporting base 1, an inner housing 2, an outer housing 3, a bending prevention device 4 and a supporting device 41 oppositely disposed on the supporting base 1, a first cable 5 disposed on the bending prevention device 4, and a second cable 6 disposed on the supporting device 41, wherein a lead of the first cable 5 and a lead of the second cable 6 are correspondingly connected to form a connecting portion 7, two ends of the inner housing 2 are respectively sleeved on the first cable 5 and the second cable 6, the connecting portion 7 is disposed in the inner housing 2, the inner housing 2 is provided with a first glue injecting hole 21, the outer housing 3 includes a first half housing 31 and a second half housing 32 respectively sleeved on the first cable 5 and the second cable 6, opposite ends of the first half housing 31 and the second half housing 32 are detachably connected, and a second glue injection hole 33 is formed in the first half shell 31 and/or the second half shell 32, the inner shell 2 is positioned in the outer shell 3, and waterproof sealant 8 is filled in the inner shell 2 and the outer shell 3.

The link of first cable 5 and second cable 6 passes through interior casing 2 and outer casing 3 and connects to fill in including casing 2 and outer casing 3 and establish waterproof sealed glue 8, make connecting portion 7 bury underground in the waterproof sealed glue 8 of interior casing 2, interior casing 2 buries underground in the waterproof sealed glue 8 of outer casing 3, reach fine leakproofness and resistance to pressure. The construction process of the anchor land shore power 10KV heterogeneous cable underwater connector comprises the following steps: firstly, a first cable 5 and a second cable 6 are respectively penetrated from one outward end of the bending prevention device 4 and the supporting device 41 and respectively extend out from one inward end of the bending prevention device 4 and the supporting device 41; secondly, respectively sleeving a first half shell sleeve 31 and a second half shell sleeve 32 of the outer shell 3 on a first cable 5 and a second cable 6, movably sleeving the inner shell 2 on the first cable 5, connecting a lead of the first cable 5 with a lead of the second cable 6, wrapping an insulating layer 71 outside a connecting part 7 of the leads, and then moving the inner shell 2 to enable one end of the inner shell 2 to be sleeved on the first cable 5 and the other end to be sleeved on the second cable 6; then, the inner shell 2 is filled with the waterproof sealant 8 through the first sealant injection hole 21, so that the connecting part 7 of the lead is embedded in the waterproof sealant 8 in the inner shell 2; then, connecting inward ends of the first half shell 31 and the second half shell 32, and connecting outward ends with corresponding cables in a sealing manner; finally, the outer shell 3 is filled with the waterproof sealant 8 through the second sealant injection hole 33, so that the inner shell 2 is embedded in the waterproof sealant 8 in the outer shell 3. The anchor land shore power 10KV heterogeneous cable underwater connector is convenient to construct, good in sealing performance and good in pressure resistance.

In this embodiment, the sleeving parts of the first half shell 31 and the second half shell 32 and the corresponding cables are respectively provided with a pressing sleeve 9, and an elastic sealing sleeve 91 is arranged between the pressing sleeve 9 and the corresponding cables. Further enhance the sealing performance, and simultaneously avoid the outer shell 3 to leak glue in the process of injecting the waterproof sealant 8. The outer end of the first half shell 31 is tightly sealed on the first cable 5 through an elastic sealing sleeve 91, and the outer end of the second half shell 32 is tightly sealed on the second cable 6 through the elastic sealing sleeve 91.

In this embodiment, as shown in fig. 4, an annular slot 92 is formed at an outer end of the elastic sealing sleeve 91, and a clamping sleeve 93 is disposed in the annular slot 92. After the outer shell 3 is installed, namely, the outward end of the first half shell 31 is sleeved on a first cable 5, the outward end of the second half shell 32 is sleeved on a second cable 6, the opposite ends of the first half shell 31 and the second half shell 32 are connected, the elastic sealing sleeve 91 is inserted into a gap between the half shells and the cables, and then the clamping sleeve 93 is clamped into the annular slot 92 of the elastic sealing sleeve 91 from the outward end of the elastic sealing sleeve 91, so that the elastic sealing sleeve 91 is tightly abutted between the half shells and the cables, a good sealing effect is achieved, and the construction operation is convenient.

In this embodiment, the second cable 6 is welded to the corresponding pressing sleeve 9. The first cable 5 and the second cable 6 are not damaged by the action of tensile force outside the connection. The outer shell 3 can achieve the effect of enough mechanical protection on the basis of meeting the electrical performance of the joint according to the structural size of the joint, and simultaneously can bear a series of problems of underwater high pressure, corrosion resistance and the like. The periphery of the second cable 6 (submarine cable) is provided with a steel wire sleeve, the steel wire sleeve is directly welded on the pressing sleeve 9 at the outer end of the second half shell 32 in a 316L stainless steel wire argon arc welding mode, the pressing sleeve is tightly locked through the elastic sealing sleeve 91, and the sufficient mechanical strength and the good electrical performance of the pressing sleeve are ensured through two processes. First half shell 31 and second half shell 32 select 316L material 6mm thick stainless steel material to make, guarantee that half shell bears 2Mpa pressure under water, inject waterproof sealant 8 in the shell body 3 and seal. Interior casing 2 is the copper casing, carries out duplicate protection to connecting portion 7, improves connecting portion 7 running quality, and interior casing 2's inside is filled with waterproof sealed glue 8 equally, has really accomplished sealed, waterproof, insulating as an organic whole.

In this embodiment, the wires of the first cable 5 and the wires of the second cable 6 are welded by heat release. The conductor connection type of the first cable 5 and the second cable 6 belongs to the connection of dissimilar conductors, the first cable 5 is a 5-type conductor (rubber insulation split-phase braided shielding steel wire braided armored cable), and the second cable 6 is a 2-type conductor (cross-linked polyethylene insulation split-phase lead-clad thick steel wire armored cable). Therefore, if the conventional crimping method is adopted, the unreliable mechanical and electrical connection is easy to occur, and when the underwater joint moves along with the rise and fall tide for a long time, the connecting part 7 is possibly loosened greatly, so that a series of problems are caused. The wire connection is carried out by adopting an exothermic welding mode, and the combination is realized by melting metal through overheating generated by exothermic reaction, the reaction is completed within a few seconds, and the chemical principle is as follows:

metal oxide + aluminum (powder) → aluminum oxide + metal + heat energy

MO + AL → M + ALO + high temperature M- - -is a desirable usable metal

The outstanding advantages of the heat release welding are obvious: the welding points are of a molecular structure and are permanent and do not age; the welding point is like copper, tougher than copper, and is not influenced by corrosive products; the welding point is permanent and does not cause high resistance due to loosening or corrosion; the welding point can bear large surge (fault) current repeatedly without degradation; under the impact of short-time large current, the lead is melted before the welding point; the current-carrying capacity of the welding point is the same as that of the cable; the total heat quantity is much less than that of other welding methods during welding, and the damage and the influence on the insulation are extremely small.

In this embodiment, the insulating layer 71 is provided outside the connection portion 7. Specifically, the insulating layer 71 is formed by wrapping a thermoplastic elastomer (band). The insulating connection of the connecting part 7 adopts a thermoplastic elastomer to perform insulating manufacture and recovery in a wrapping mode, so that the outer insulating wall of the first cable 5 and the outer insulating wall of the second cable 6 are completely fused into a whole, and the cable has good strength and rigidity.

Thermoplastic elastomers are blends of polymers whose dispersed phase is the hard phase, i.e. the plastic phase, which determines to a large extent the stiffness, stability, oil and solvent resistance and heat resistance of the material; the continuous phase is an elastomeric phase, i.e., a rubbery phase, providing high elasticity. When heated, the plastic phase enters a viscous state, so that the thermoplastic elastomer can be processed like plastic; after cooling, the plastic phase hardens under the action of strong intermolecular forces, i.e. "physical crosslinking" takes place, giving the thermoplastic elastomer its strength and rigidity.

In this embodiment, first half shell 31 and second half shell 32 are fixed to support base 1 by fasteners 94. Specifically, the first half shell 31 and the second half shell 32 are provided with connecting blocks 34 on the outer walls, the supporting seat 1 is provided with supporting blocks 11, the fixing member 94 is a fixing bolt, and the connecting blocks 34 and the supporting blocks 11 are connected through the fixing bolt, so that the stability of the outer shell 3 is improved. First half shell 31 and second half shell 32 pass through connecting bolt 35 and connect, simple to operate.

In this embodiment, a humidity sensor 95 is provided in the inner case 2. The humidity sensor 95 is connected to an external display device or a control unit, and detects humidity in the inner case 2 in real time to prevent an accident.

In this embodiment, two first glue injection holes 21 are formed in the inner housing 2, and the first half shell 31 and the second half shell 32 are both provided with second glue injection holes 33, so that glue injection can be smoothly performed. Lifting lugs 96 are arranged on the first half shell 31 and the second half shell 32, so that the lifting is convenient.

Example two:

a method for preparing an underwater joint of an anchor land shore power 10KV dissimilar cable comprises the following steps:

s1: cable threading: the first cable 5 and the second cable 6 are respectively penetrated from the outward ends of the bending-proof device 4 and the supporting device 41 and respectively extend out from the inward ends of the bending-proof device 4 and the supporting device 41;

s2: wire-bonding and mounting inner case 2: sleeving a first half shell sleeve 31 and a second half shell sleeve 32 of an outer shell 3 on a first cable 5 and a second cable 6 respectively, movably sleeving an inner shell 2 on the first cable 5, connecting a lead of the first cable 5 with a lead of the second cable 6, wrapping an insulating layer 71 outside a connecting part 7 of the leads, and moving the inner shell 2 to enable one end of the inner shell 2 to be sleeved on the first cable 5 and the other end to be sleeved on the second cable 6; the wires of the first cable 5 and the wires of the second cable 6 are welded by heat release, and after the connection, an insulating layer 71 is formed at the welding position by wrapping a thermoplastic elastomer.

S3: 2 glue injection of the inner shell: the waterproof sealant 8 is filled into the inner shell 2 through the first sealant injection hole 21, so that the connecting part 7 of the lead is embedded in the waterproof sealant 8 in the inner shell 2; the two ends of the inner shell 2 can be respectively and fixedly connected with the peripheral side of the first cable 5 and the peripheral side of the second cable 6, so that the mechanical protection effect and the underwater bearing capacity are improved.

S4: installing an outer shell 3: connecting inward ends of the first half shell 31 and the second half shell 32, and connecting the outward ends with corresponding cables in a sealing manner; after the outer shell 3 is installed, namely, the outward end of the first half shell 31 is sleeved on the first cable 5, the outward end of the second half shell 32 is sleeved on the second cable 6, and after the opposite ends of the first half shell 31 and the second half shell 32 are connected, the elastic sealing sleeve 91 is inserted into a gap between the half shells and the cables, and then the clamping sleeve 93 is clamped into the annular slot 92 of the elastic sealing sleeve 91 from the outward end of the elastic sealing sleeve 91, so that the elastic sealing sleeve 91 is tightly abutted between the half shells and the cables, thereby achieving a good sealing effect and being convenient for construction and operation.

S5: injecting glue into the outer shell 3: the outer shell 3 is filled with the waterproof sealant 8 through the second sealant injection hole 33, so that the inner shell 2 is embedded in the waterproof sealant 8 in the outer shell 3.

The preparation method of the anchor land shore power 10KV heterogeneous cable underwater connector is convenient to construct, and the sealing property and the pressure resistance are improved through double protection of the inner shell 2 and the outer shell 3.

Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make numerous possible variations and modifications to the present invention, or modify equivalent embodiments to equivalent variations, without departing from the scope of the invention, using the teachings disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.