Cable suitable for high temperature environments

Abstract

The utility model discloses a kind of cable suitable for high temperature environment, including body, the body includes core layer, the core layer includes the steel pipe (1) for conveying oil gas, the conductor (2) for conveying electric signal and multiple air tubes (3) for cooling, the steel pipe (1) is located on the axis of body, the conductor (2) is hinged into bundle with steel pipe (1) as center, multiple air tubes (3) are located on the outer ring edge circumferential of conductor (2).The utility model provides a kind of cable suitable for high temperature environment suitable for high temperature environment with simple structure.

Description

Technical Field

[0001] This utility model relates to the field of cables, specifically cables suitable for high-temperature environments. Background Technology

[0002] In the process of oil and gas resource extraction and transportation, functionally integrated cables combining steel pipes and conductors are important transmission equipment. my country's oil and gas resources are widely distributed, with some located in high-temperature regions. In high-temperature environments, the conductor's ability to transmit electrical signals decreases, and the conductor is prone to oxidation, thus requiring high-temperature resistance from the transmission equipment.

[0003] Traditional high-temperature resistant cables are often designed by adding a high-temperature resistant protective layer to the outer layer of the cable and increasing the cross-section of the cable. The design of the high-temperature resistant protective layer increases the production cost of the cable and is not conducive to internal heat dissipation. Increasing the cross-section of the cable mainly involves dispersing the conductors to facilitate internal heat dissipation and reduce the impact of internal high temperature. However, this method has a low impact on the high temperature of the external environment and does not solve the essential problem. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a cable with a simple structure that is suitable for high-temperature environments.

[0005] The technical solution adopted by this utility model to solve the above problems is as follows: a cable suitable for high temperature environment, including a body, the body including a core layer, the core layer including a steel pipe for conveying oil and gas, a conductor for conveying electrical signals and a gas pipe for cooling, the steel pipe being arranged on the axis of the body, the conductor being bundled together with the steel pipe as the center, and the gas pipe being arranged on the outer edge of the conductor in the circumferential direction.

[0006] Compared with the prior art, the advantages of this utility model are as follows: the addition of air pipes in the cable allows the heat in the cable to be carried away through the air circulation during use, thereby achieving the effect of high temperature resistance; multiple air pipes are arranged along the circumference of the conductor, which facilitates multi-directional cooling of the conductor and avoids excessive temperature differences in different areas of the conductor; there is no design to add a high temperature protection layer or increase the cable cross-section, keeping the cable structure simple; and compared with traditional high temperature resistant cables, it has the advantages of small size and light weight.

[0007] As an improvement of this utility model, the outer edge of the conductor is uniformly arrayed with multiple mounting grooves in the circumferential direction. This improvement facilitates the installation of the core layer air tube, temperature sensor, and optical cable, and maintains the bundle shape of the core layer to ensure the stability of the structure.

[0008] As an improvement of this utility model, several of the mounting slots are equipped with air pipes to prevent the air pipes from being squeezed and deformed and blocked when installed on the conductor. Through this improvement, multiple air pipes can be installed, and the safety of the air pipes in use can be guaranteed.

[0009] As an improvement of this utility model, a temperature sensor is installed in one of the mounting slots to monitor the operating temperature of the conductor. Through this improvement, the stability of the conductor can be judged by monitoring the operating temperature of the conductor. At the same time, if the conductor temperature is found to be too high, the air supply power of the gas pipe can be increased to achieve faster cooling.

[0010] As an improvement of this utility model, multiple temperature sensors are provided, and the multiple temperature sensors are distributed at intervals along the axial direction of the body. Adjacent temperature sensors are filled with filler strips. Through this improvement, the design of multiple temperature sensors can monitor the conductor operating status in different areas. The areas where no temperature sensors are installed can be filled with filler strips to maintain the overall structural uniformity of the core layer and avoid excessive center of gravity eccentricity.

[0011] As an improvement of this utility model, an optical cable for transmitting optical signals is installed in one of the mounting slots. This improvement increases the functionality of the main body and enhances the transmission of optical signals.

[0012] As an improvement of this utility model, the conductor comprises multiple segmented conductor strips twisted together. The segmented conductor strips are formed by extruding several conductor wires. The mounting groove is located between two adjacent segmented conductor strips. Through this improvement, the conductor is segmented by the design of the segmented conductor strips, thereby avoiding the skin effect of the conductor, that is, reducing the magnitude of problems such as increased conductor resistance, increased power loss, and temperature rise, thus ensuring the power transmission of the conductor. The function of reducing the temperature rise also makes the main body more suitable for high-temperature environments.

[0013] As an improvement of this utility model, the outer ring of the segmented conductor strip is provided with a silver plating layer. Through this improvement, by designing the silver plating layer, the conductivity of the conductor can be improved by taking advantage of the fact that silver has better conductivity than copper, resulting in less loss during transmission. In addition, silver has higher chemical stability than copper and has the effect of inhibiting oxidation, thereby preventing copper from oxidizing in high-temperature environments.

[0014] As an improvement of this utility model, a polyurethane foam layer is provided between the steel pipe and the conductor. This improvement increases the heat insulation effect between the steel pipe and the conductor. Since the gases and liquids extracted from oil and gas also have high temperatures, the polyurethane foam layer can prevent the high temperature inside the steel pipe from affecting the cable. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the cross-sectional structure of this utility model.

[0016] Figure 2 This is a cross-sectional schematic diagram of the temperature sensor connection structure of this utility model.

[0017] The following are shown in the figure: 1. Steel pipe, 2. Conductor, 2.1. Mounting groove, 2.2. Segmented conductor strip, 3. Air pipe, 4. Temperature sensor, 5. Filler strip, 6. Optical cable, 7. Silver plating layer, 8. Polyurethane foam layer, 9. Wrapping tape. Detailed Implementation

[0018] The embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0019] like Figure 1 As shown, a cable suitable for high-temperature environments includes a body, the body including a core layer, the core layer including a steel pipe 1 for conveying oil and gas, a conductor 2 for conveying electrical signals and three air pipes 3 for cooling, the steel pipe 1 being located on the axis of the body, the conductor 2 being bundled together with the steel pipe 1 as the center, and the multiple air pipes 3 being located on the outer edge of the conductor 2 in the circumferential direction.

[0020] The conductor 2 comprises five segmented conductor strips 2.2 twisted together. Each segmented conductor strip 2.2 is formed by extruding several conductor wires. The five segmented conductor strips 2.2 are spliced ​​together circumferentially to form a complete ring. The inner ring of the ring abuts against the steel pipe 1. Five mounting slots 2.1 are evenly arrayed circumferentially on the outer edge of the ring. The mounting slots 2.1 are located between two adjacent segmented conductor strips 2.2. Air pipes 3 are installed in three of the mounting slots 2.1 to prevent the air pipes 3 from being compressed and deformed and blocked when installed on the conductor 2. A temperature sensor 4 is installed in one mounting slot 2.1 to monitor the operating temperature of the conductor 2. An optical cable 6 for transmitting optical signals is installed in one mounting slot 2.1.

[0021] like Figure 2 As shown, multiple temperature sensors 4 are provided, and the multiple temperature sensors 4 are distributed at intervals along the axial direction of the body. Adjacent temperature sensors 4 are filled by filler strips 5. In practical applications, a temperature sensor 4 is installed at a distance of 500-1000 meters depending on the cable laying length. The temperature sensor 4 has a conventional structure. Wireless temperature sensors 4 or wired temperature sensors 4 can be used according to the usage requirements. The wires of the wired temperature sensor 4 can be installed by processing wire grooves on the surface of the filler strips 5.

[0022] like Figure 1As shown, the outer ring of the segmented conductor strip 2.2 is provided with a silver-plated layer 7, and a polyurethane foam layer 8 is provided between the steel pipe 1 and the conductor 2. The conductor 2, air pipe 3, optical cable 6, filler strip 5 and temperature sensor 4 inside the conductor layer are shaped and fixed by the wrapping tape 9 on the outer layer of the conductor layer. Then, a metal shielding layer, an insulation layer, an insulation shielding layer, an armor layer and an outer sheath are formed sequentially on the outer layer of the wrapping tape 9.

[0023] The design of the air tube 3 can cool down the high temperature caused by the high temperature of the environment and the high temperature caused by the resistance loss during the power transmission of the conductor 2. The design of the silver plating layer 7 can reduce the high temperature caused by the resistance loss. At the same time, the design of the polyurethane foam layer 8 can isolate the heat transfer from the steel pipe 1 to the conductor 2, thereby maintaining the cable at an appropriate working temperature to ensure the high efficiency of the cable. Its structure is simple, small in size and light in weight.

[0024] The above description only illustrates the preferred embodiment of this utility model and should not be construed as limiting the scope of the claims. This utility model is not limited to the above embodiments, and variations in its specific structure are permitted. All changes made within the scope of the independent claims of this utility model are also within the scope of protection of this utility model.

Claims

1. A cable suitable for use in high temperature environments comprising a body characterised in that: The body includes a core layer, which includes a steel pipe (1) for transporting oil and gas, a conductor (2) for transporting electrical signals, and multiple air pipes (3) for cooling. The steel pipe (1) is located on the axis of the body, the conductor (2) is bundled together with the steel pipe (1) as the center, and the multiple air pipes (3) are located on the outer edge of the conductor (2) in the circumferential direction.

2. The cable according to claim 1, adapted for use in high temperature environments, characterized in that: The outer edge of the conductor (2) has a plurality of mounting slots (2.1) evenly arranged in a circumferential direction.

3. The cable of claim 2, wherein: Several of the mounting slots (2.1) are equipped with air pipes (3) to prevent the air pipes (3) from being squeezed and deformed and blocked when installed on the conductor (2).

4. The cable of claim 2, wherein: A temperature sensor (4) is installed in one of the mounting slots (2.1) to monitor the operating temperature of the conductor (2).

5. The cable of claim 4, wherein: The temperature sensor (4) is provided in multiple ways, and the multiple temperature sensors (4) are distributed at intervals along the axial direction of the body, and the adjacent temperature sensors (4) are filled by filler strips (5).

6. The cable of claim 2, wherein: One of the mounting slots (2.1) is equipped with an optical cable (6) for transmitting optical signals.

7. The cable suitable for high-temperature environments according to claim 2, characterized in that: The conductor (2) is composed of multiple segmented conductor strips (2.2) twisted together. The segmented conductor strips (2.2) are formed by extruding several conductor wires. The mounting groove (2.1) is located between two adjacent segmented conductor strips (2.2).

8. The cable of claim 7, wherein: The outer ring of the segmented conductor strip (2.2) is provided with a silver plating layer (7).

9. The cable of claim 1, wherein: A polyurethane foam layer (8) is provided between the steel pipe (1) and the conductor (2).

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