JPS5810306A - Cooled cable line - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cooling cable line capable of cooling a ring cable installed in a conduit.

As the demand for electricity increases, 5001 (V class) ultra-high voltage power transmission has been realized, and even 100 OKV class ultra-high voltage power transmission is now being planned.

Conventionally, in order to increase the power transmission capacity of such a ring cable, K provided a refrigerant passage inside or outside the conductor, circulated the refrigerant through the passage, and performed all heat exchange between the conductor and the refrigerant. The cooling method was generally adopted, but the flow of refrigerant was
Since the VC is in the longitudinal direction of the cable, even if the temperature of the refrigerant itself is low at first, it gradually becomes the temperature of the temperature, and as a result, the heat exchange capacity in the longitudinal direction VC of the cable gradually decreases. This had the disadvantage that the temperature was uneven in the direction and the cooling efficiency was poor.

The present invention was created in view of the above-mentioned circumstances.
A cable is placed in a sealed pipe, and a refrigerant is filled, and this is placed in a dog pipe with an outer diameter.
The cooling cable line is designed to fully circulate low-temperature air in the space between the conduit and the r゛ closure path, and the refrigerant absorbs heat from the surface of the cable and vaporizes, completely cooling the cable itself. This is a cooling cable line in which all the heat is exchanged between the vaporized refrigerant and the low-temperature air inside the sealed tube, and the refrigerant is liquefied again.

Next, referring to the entire drawing VC of the embodiment of the present invention, Fig. 1 is a cross-sectional view showing an example of the cooling cable line of the present invention. An absorbent tape 2 made of rubber or plastic or the like is wrapped around the pipe 2 and stored in a completely sealed tube 4, and an appropriate amount of a refrigerant 3 such as water or chlorofluorocarbon is stored therein. This absorbent tape 2 exists and wraps the cable around the cable more effectively with the refrigerant, so it is advantageous for cooling the entire cable. may be provided for each article rather than all at once. The thus-obtained product is stored in the pipe line 5, and the sealed pipe 3
Low-temperature air is made to flow through the space between and the pipe line 5.

FIG. 2 is a longitudinal sectional view showing an example of the relationship with a cooling device.

Absorbent tape is wrapped around the cable 10 table 1fi.
2. It is placed in a sealed tube 4. Note that an appropriate amount of refrigerant 3 is introduced into the sealed tube 4. E-tsukifugu 4-2 and 5-2 are provided at the cable lead-out big end of the sealed pipe and conduit 5, so that the cable is airtightly constructed.

One end of the above pipe 5 is connected to the expansion valve ■, and a condenser 〇 and a compressor A are installed at the end of the expansion valve. IJ IJ tower is attached. The other end of the conduit 5 is adapted to exhaust air upwardly.

Therefore, the air in the atmosphere is compressed by the compressor A, cooled by the condenser 〇, rapidly expanded by the expansion valve V, and passed through the conduit 5.In this conduit 5, the temperature of the cable increases. As a result, the refrigerant 3 absorbs heat from the cable in the sealed tube 4 and vaporizes, is cooled and condensed by the cold air passing outside the sealed tube, and returns to a liquid state again. This process is repeated.

Therefore, according to the present invention, since the flow of the refrigerant is radial, 1. The cable is cooled uniformly without causing temperature non-uniformity in the longitudinal direction of the cable. In addition, when using refrigerant and water, safety can be ensured even if there is a problem with the valve, valve, etc., or leakage from the sealed pipe due to deterioration of the nobutsukin. There is no risk of contaminating the human body or the environment. Further, since the low temperature air required for condensing the refrigerant VC is supplied from one end of the former and discharged into the atmosphere from the other end, various effects such as eliminating the need for a return nozzle can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing an example of a cooling cable line according to the present invention, and FIG. 2 is a longitudinal cross-sectional view with a partial block diagram showing the relationship between the cooling cable line and low-temperature air supply equipment, etc. of the present invention. be. 1...Cable 3...Refrigerant 4...Hermetically sealed pipe 5...Pipeline Patent applicant Fujikura Electric Cable Co., Ltd. Agent Patent attorney Mamoru Takeuchi 5--3゜

Claims (1)

[Claims] A cooling cable characterized in that a cable and a refrigerant are arranged in a sealed tube, the sealed tube is arranged in a relatively thick 1g path, and low-temperature air is circulated between the conduit and the sealed tube. line.