阅读说明：本技术 一种海缆和陆缆连接用过渡接头 (Transition joint for connecting submarine cable and land cable ) 是由 叶信红 林俊肖 阙善庭 朱敏捷 朱栋钰 黄韵 陈燕 于 2021-06-29 设计创作，主要内容包括：本发明公开了一种海缆和陆缆连接用过渡接头,特点是包括保护外筒体和同轴设置在保护外筒体内部的连接内筒体,连接内筒体具有左右贯通的供海缆和陆缆伸入安装的中心通孔,保护外筒体与连接内筒体之间设置有散热机构。优点是结构简单,通过在保护外筒体与连接内筒体之间设置散热机构,通过散热机构可有效地降低该过渡接头的内温,从而可有效避免因过渡接头内的温度过高造成海缆和陆缆接头处发生绝缘老化或崩烧等故障,确保了整个供电系统使用的安全性。(The invention discloses a transition joint for connecting a submarine cable and a land cable, which is characterized by comprising a protective outer cylinder and a connecting inner cylinder coaxially arranged in the protective outer cylinder, wherein the connecting inner cylinder is provided with a central through hole which is communicated from left to right and used for the submarine cable and the land cable to stretch into and be installed, and a heat dissipation mechanism is arranged between the protective outer cylinder and the connecting inner cylinder. The advantage is simple structure, through set up heat dissipation mechanism outside the protection between barrel and the barrel in being connected, can reduce this transition joint's interior temperature effectively through heat dissipation mechanism to can effectively avoid causing submarine cable and land cable joint department to take place insulating ageing or collapse trouble such as burn because of the high temperature in the transition joint, ensure the security that whole power supply system used.)

1. The transition joint for connecting the submarine cable and the land cable is characterized by comprising a protective outer barrel and a connecting inner barrel coaxially arranged inside the protective outer barrel, wherein the connecting inner barrel is provided with a central through hole which is communicated with the left and right and used for the submarine cable and the land cable to stretch into and be installed, and a heat dissipation mechanism is arranged between the protective outer barrel and the connecting inner barrel.

2. The transition joint for connecting a submarine cable and a land cable according to claim 1, wherein the heat dissipation means is a U-shaped cooling pipe disposed on the inner wall of the protective outer cylinder, the protective outer cylinder is provided with left and right through holes at corresponding positions for inserting two ends of the U-shaped cooling pipe, the ends of the U-shaped cooling pipe are inserted into the holes at corresponding positions, a heat exchanger is disposed outside the protective outer cylinder, and the two ends of the U-shaped cooling pipe are connected to corresponding heat exchange ports of the heat exchanger through pipes.

3. The transition joint for connecting a submarine cable and a land cable according to claim 1, wherein a water-blocking layer is filled between the protective outer cylinder and the connecting inner cylinder.

4. The transition joint for connecting a submarine cable and a land cable according to claim 3, wherein the protective outer cylinder is provided with a filling port which is internally and externally communicated and used for filling water-blocking glue and a filling agent, the filling port is detachably provided with a sealing plug, and the water-blocking layer is formed by filling the water-blocking glue and the filling agent through the filling port and then curing the water-blocking glue and the filling agent.

5. The transition joint for connecting a submarine cable and a land cable according to claim 2, wherein the inner connecting cylinder comprises a main connecting section and lead-in sections coaxially arranged at two ends of the main connecting section, and the ends of the submarine cable and the land cable respectively penetrate through the lead-in sections from two ends to extend into the main connecting section to realize butt joint;

the protective outer cylinder body comprises a main protective section, positioning sections are coaxially arranged at the left end and the right end of the main protective section respectively, the inner diameter of the main protective section is larger than that of the positioning sections, the main protective section is connected with the positioning sections through vertically arranged annular connecting plates, and the annular connecting plates are provided with mounting holes;

the main connecting section is coaxially arranged in the main protection section, and the outer end of the leading-in section extends into the corresponding positioning section and is fixedly connected with the positioning section.

6. A transition joint for connecting a submarine cable and a land cable according to claim 5, wherein said protective outer cylinder is assembled by cutting two symmetrical half-pipe shells along the plane of the central axis of said protective outer cylinder, and the inner wall of each half-pipe shell is provided with said U-shaped cooling pipe.

7. The transition joint for connecting a submarine cable and a land cable according to claim 6, wherein a first semicircular arc-shaped positioning seat is convexly arranged on the inner wall of the positioning section of one of the half pipe shells, a first semicircular arc-shaped hoop is detachably arranged on the first positioning seat, the first hoop is arranged on the first positioning seat to form a first clamping cavity for clamping and fixing the outer end of the leading-in section extending into the positioning section, and the outer end of the leading-in section is clamped and fixed in the first clamping cavity.

8. The transition joint for connecting the submarine cable and the land cable according to claim 6 or 7, wherein a semi-arc-shaped second positioning seat is convexly arranged on the inner wall of the positioning section of one of the half pipe cases, a semi-arc-shaped second hoop is detachably arranged on the second positioning seat, the second hoop is arranged on the second positioning seat to form a second clamping cavity for clamping and fixing the land cable or the submarine cable, and the part of the land cable and the submarine cable extending into the positioning section is clamped and fixed through the second clamping cavity.

9. A transition joint for connecting a sea cable and a land cable according to claim 1, wherein a temperature sensor is provided on the outer side wall of the connecting inner cylinder.

10. A transition joint for connecting a submarine cable and a land cable according to claim 1, wherein said protective outer cylinder is provided at both ends thereof with respective bending limiters.

Technical Field

The invention relates to a transition joint, in particular to a transition joint for connecting a submarine cable and a land cable.

Background

Submarine cables have become an indispensable motivator to meet the demand for faster and better communication and increasingly tense power supply in coastal cities. During the landing process of the submarine cable, a complete power system is formed by connecting the submarine cable with the land cable. The sea and land cable connection method has various methods, and the common method is to use a transition joint or a terminal tower for connection, wherein the transition joint is used for connecting the sea and land cable, so that the sea and land cable is economic and convenient in overall consideration and becomes the first choice of engineering.

The transition joint for cable connection is the weakest link in a cable line, transition joint faults in daily operation account for more than 90% of cable operation faults and are multiple points of cable faults, and transition joint temperature is the most main factor causing the cable faults when the transition joint temperature is overhigh in operation, when contact resistance is overlarge or overload occurs, the transition joint temperature is overhigh, insulation aging or breakdown faults occur at the joints of a submarine cable and a land cable, even burnout faults occur in serious conditions, the safety of the whole power supply system is seriously influenced, and huge economic loss is caused. Therefore, how to perform heat dissipation treatment on the transition joint in the operation process becomes a problem to be solved urgently.

Disclosure of Invention

The invention aims to solve the technical problem of providing a transition joint for connecting a submarine cable and a land cable, which has a simple structure and can effectively dissipate heat to ensure the use safety.

The technical scheme adopted by the invention for solving the technical problems is as follows:

the utility model provides a submarine cable and land cable are connected and are used transition joint, is in including the outer barrel of protection and coaxial setting the inside barrel of connection of the outer barrel of protection, the connection in the barrel have about the confession submarine cable that link up and land cable stretch into the central through-hole of installation, the outer barrel of protection with be provided with heat dissipation mechanism in the connection between the barrel.

The heat dissipation mechanism is a U-shaped cooling pipe arranged on the inner wall of the outer protective barrel, a left end and a right end which are communicated with each other and used for supplying the U-shaped cooling pipe to stretch into the mounting hole for mounting are arranged at the position corresponding to the outer protective barrel, the ends of the U-shaped cooling pipe respectively stretch into the mounting hole arranged at the corresponding position, a heat exchanger is arranged outside the outer protective barrel, and the two ends of the U-shaped cooling pipe are respectively connected with the corresponding heat exchange interfaces of the heat exchanger through pipelines. The heat dissipation mechanism is simple in structure, the heat exchanger arranged outside the heat dissipation mechanism can provide cooling liquid or cooling gas for the U-shaped cooling pipe, the heat inside the transition joint can be taken out through the heat exchange, and effective heat dissipation and cooling are achieved.

And a waterproof layer is filled between the protective outer cylinder and the connecting inner cylinder. The waterproof layer plays a role in strict waterproof and water-proof.

The waterproof layer is formed by pouring the waterproof glue and the filler into the filling port and then curing the waterproof layer. The filling port is used for filling water-blocking glue and a filling agent, so that the manufacturing of the water-blocking layer is facilitated, and after the filling is finished, the sealing plug is plugged to play a role in sealing and protecting the interior of the joint.

The connecting inner cylinder body comprises a main connecting section and leading-in sections coaxially arranged at two ends of the main connecting section, and the ends of the submarine cable and the land cable respectively penetrate through the leading-in sections from two ends to extend into the main connecting section to realize butt joint;

the protective outer cylinder body comprises a main protective section, positioning sections are coaxially arranged at the left end and the right end of the main protective section respectively, the inner diameter of the main protective section is larger than that of the positioning sections, the main protective section is connected with the positioning sections through vertically arranged annular connecting plates, and the annular connecting plates are provided with mounting holes;

the main connecting section is coaxially arranged in the main protection section, and the outer end of the leading-in section extends into the corresponding positioning section and is fixedly connected with the positioning section. The structural design effectively reduces the use of materials and the occupation of space, and is favorable for the fixed connection with the submarine cable and the land cable.

The protective outer cylinder body is formed by splicing two symmetrical half-pipe shells cut along the plane of the central axis of the protective outer cylinder body, and the inner wall of each half-pipe shell is provided with the U-shaped cooling pipe. The U-shaped cooling pipe is arranged on the inner wall of each half pipe shell, so that uniform and rapid heat dissipation and cooling can be realized.

Each half pipe shell can be divided into two detachable connecting sections according to the length design, and the inner wall of each connecting section is provided with one U-shaped cooling pipe. Convenient to make and transport, further realize evenly and the cooling of express delivery ground simultaneously.

The inner wall of the positioning section of one half tube shell is convexly provided with a semicircular arc-shaped first positioning seat, the first positioning seat is detachably provided with a semicircular arc-shaped first hoop, the first hoop is arranged on the first positioning seat to form a first clamping cavity for clamping and fixing the outer end of the leading-in section extending into the positioning section, and the outer end of the leading-in section is clamped and fixed in the first clamping cavity. The structure realizes that the connecting inner barrel can be stably installed in the protecting outer barrel, and has simple structure, convenient installation and disassembly and low cost.

The inner wall of the positioning section of one half pipe shell is convexly provided with a semicircular second positioning seat, the second positioning seat is detachably provided with a semicircular second hoop, the second hoop is arranged on the second positioning seat to form a second clamping cavity for clamping and fixing the land cable or the submarine cable, and the part of the land cable and the submarine cable extending into the positioning section is clamped and fixed through the second clamping cavity. Above-mentioned structure has realized that submarine cable and land cable can stable mounting the protection urceolus in, simple structure, the installation is dismantled conveniently, with low costs.

And a temperature sensor is arranged on the outer side wall of the connecting inner cylinder body. Can be used to the inside temperature of monitoring transition joint through temperature sensor, can set up a main control unit externally, with temperature sensor's signal transmission to main control unit, main control unit control heat exchanger work realizes the inside heat dissipation and the cooling of transition joint, has realized the automation mechanized operation.

And two ends of the protective outer cylinder body are respectively provided with a bending limiter. The device is used for forming bending-proof protection for the submarine cable and the land cable and ensuring the straightness of the submarine cable and the land cable.

The protective outer cylinder body and the U-shaped cooling pipe are both made of stainless steel materials. The stainless steel has better corrosion resistance, and the whole service life is prolonged.

Compared with the prior art, the invention has the advantages that: simple structure through set up heat dissipation mechanism outside the protection between the barrel and the barrel in being connected, can reduce this transition joint's interior temperature effectively through heat dissipation mechanism to can effectively avoid causing submarine cable and land cable joint department to take place insulating ageing or collapse trouble such as burn because of the high temperature in the transition joint, ensure the security that whole power supply system used.

Drawings

FIG. 1 is a schematic overall perspective view of the present invention;

FIG. 2 is a schematic cross-sectional view of the present invention;

fig. 3 is a schematic perspective view of one of the half-shells of the present invention;

fig. 4 is a schematic perspective view of a half-shell with a U-shaped cooling tube installed therein according to the present invention.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

As shown in the figure, a sea cable and land cable are connected and are used transition joint, barrel 2 in the connection of barrel 1 inside outside the protection including the outer barrel 1 of protection and coaxial setting, barrel 2 has the central through-hole 21 that supplies sea cable and land cable that link up about connecting to stretch into the installation, is provided with heat dissipation mechanism between barrel 2 in the protection outer barrel 1 and the connection.

In this embodiment, the heat dissipation mechanism is a U-shaped cooling tube 3 disposed on the inner wall of the protection outer cylinder 1, the protection outer cylinder 1 is disposed at a corresponding position with left and right through mounting holes 11 for two ends of the U-shaped cooling tube 3 to extend into, the ends of the U-shaped cooling tube 3 respectively extend into the mounting holes 11 disposed at the corresponding positions, a heat exchanger (not shown) is disposed outside the protection outer cylinder 1, and the two ends of the U-shaped cooling tube 3 are respectively connected with corresponding heat exchange interfaces of the heat exchanger through pipes (not shown). The heat dissipation mechanism is simple in structure, the heat exchanger arranged outside the heat dissipation mechanism can provide cooling liquid or cooling gas for the U-shaped cooling pipe 3, the heat inside the transition joint can be taken out through the heat exchange, and effective heat dissipation and cooling are achieved.

In this embodiment, a water-proof layer (not shown) is filled between the protective outer cylinder 1 and the connecting inner cylinder 2. The waterproof layer plays a role in strict waterproof and water-proof.

In this embodiment, the protective outer cylinder 1 is provided with a filling port 12 which is communicated with the inside and the outside and is used for filling water-blocking glue and filling agent, a sealing plug 13 is detachably arranged on the filling port 12, and the water-blocking layer is formed by filling water-blocking glue and filling agent through the filling port 12 and then curing. The filling port 12 is used for filling water-blocking glue and a filling agent, so that the manufacturing of the water-blocking layer is facilitated, and after the filling is finished, the sealing plug 13 is plugged to play a role in sealing and protecting the interior of the joint.

In this embodiment, the connection inner cylinder 2 includes a main connection section 201 and lead-in sections 202 coaxially disposed at two ends of the main connection section 201, and the ends of the submarine cable and the land cable respectively penetrate through the lead-in sections 202 from the two ends to extend into the main connection section 201 for realizing butt joint;

the protective outer cylinder body 1 comprises a main protective section 101, the left end and the right end of the main protective section 101 are respectively coaxially provided with a positioning section 102, the inner diameter of the main protective section 101 is larger than that of the positioning section 102, the main protective section 101 is connected with the positioning section 102 through a vertically arranged annular connecting plate 103, and the annular connecting plate 103 is provided with a mounting hole 11;

the main connecting section 201 is coaxially arranged in the main protection section 101, and the outer end of the leading-in section 202 extends into the corresponding positioning section 102 and is fixedly connected with the positioning section 102. The structural design effectively reduces the use of materials and the occupation of space, and is favorable for the fixed connection with the submarine cable and the land cable.

In this embodiment, the protective outer cylinder 1 is formed by assembling two symmetrical half-tube shells 10 cut along the plane of the central axis of the protective outer cylinder 1, and the inner wall of each half-tube shell 10 is provided with a U-shaped cooling tube 3. The U-shaped cooling pipe 3 is arranged on the inner wall of each half pipe shell 10, so that uniform and rapid heat dissipation and cooling can be realized.

In this embodiment, each half-shell 10 can be divided into two detachable connecting sections 100 according to the length design, and one U-shaped cooling pipe 3 is disposed on the inner wall of each connecting section 100. Convenient to make and transport, further realize evenly and the cooling of express delivery ground simultaneously.

In this embodiment, a semicircular arc-shaped first positioning seat 15 is convexly arranged on the inner wall of the positioning section 102 of one of the half-shells 10, a semicircular arc-shaped first hoop 16 is detachably arranged on the first positioning seat 15, the first hoop 16 is arranged on the first positioning seat 15 to form a first clamping cavity 17 for clamping and fixing the outer end of the lead-in section 202 extending into the positioning section 102, and the outer end of the lead-in section 202 is clamped and fixed in the first clamping cavity 17. The structure realizes that the inner connecting cylinder body 2 can be stably installed in the outer protecting cylinder body 1, and has the advantages of simple structure, convenient installation and disassembly and low cost.

In this embodiment, a semicircular second positioning seat 18 is convexly arranged on the inner wall of the positioning section 102 of one half pipe case 10, a semicircular second hoop 19 is detachably arranged on the second positioning seat 18, the second hoop 19 is arranged on the second positioning seat 18 to form a second clamping cavity 20 for clamping and fixing the land cable or the sea cable, and the part of the land cable and the sea cable extending into the positioning section 102 is clamped and fixed through the second clamping cavity 20. Above-mentioned structure has realized that submarine cable and land cable can stable installation the outer barrel of protection 1 in, simple structure, the installation is dismantled conveniently, with low costs.

In this embodiment, a temperature sensor (not shown) is disposed on the outer side wall of the connection inner cylinder 2. Can be used to the inside temperature of monitoring transition joint through temperature sensor, can set up a main control unit externally, with temperature sensor's signal transmission to main control unit, main control unit control heat exchanger work realizes the inside heat dissipation and the cooling of transition joint, has realized the automation mechanized operation.

In this embodiment, the two ends of the protective outer cylinder 1 are respectively provided with the bending limiters 6. The device is used for forming bending-proof protection for the submarine cable and the land cable and ensuring the straightness of the submarine cable and the land cable.

In this embodiment, the protective outer cylinder 1 and the U-shaped cooling tube 3 are made of stainless steel. The stainless steel has better corrosion resistance, and the whole service life is prolonged.