Temperature measuring structure of temperature sensing optical fiber at intermediate joint of power cable

Abstract

The utility model discloses a structure for measuring the temperature of a temperature sensing optical fiber at an intermediate joint of a power cable, which comprises a power cable, the power cable is connected to form a cable joint, the structure comprises a temperature sensing optical fiber arranged on the cable joint, the temperature sensing optical fiber is arranged on the cable joint by a ribbon, the temperature sensing optical fiber is used for receiving the temperature of the cable joint, and the temperature sensing optical fiber is used for measuring the temperature of the cable joint. And the output end of the cable joint is connected with a temperature measurement host and is used for receiving a temperature signal transmitted by the temperature sensing optical fiber. The temperature-sensing optical fiber is used in a power cable intermediate joint temperature measurement structure, the temperature measurement optical fiber is waterproof, acid and alkali corrosion resistant, bendable, good in toughness and not easy to break, and the service life of the temperature measurement optical fiber is as long as 30 years; the temperature measurement optical fiber samples light wave signals and is not interfered by a strong electric field in a high-voltage environment, and data signals are reliable and stable; the temperature measurement distance is long, the positioning precision is high, and the temperature measurement precision is high, so that the temperature monitoring of the intermediate joint of the power cable has pertinence, continuity and comparability.

Description

Technical Field

[0001] The utility model relates to the technical field of optical fiber application, in particular to a temperature measuring structure of a temperature-sensitive optical fiber at an intermediate joint of a power cable. Background Art

[0002] The power cable intermediate joint is the conductor of the power cable that has arced to the shielding layer, main insulation material, outer sheath, and cable support object before the accident, causing high temperature or discharge at the fault point, resulting in overheating of the power cable intermediate joint, and ultimately causing power cable fire or intermediate joint short circuit explosion. Accurate real-time monitoring of the temperature of the power cable intermediate joint can grasp the operating status of the cable intermediate joint, and transmit the temperature signal to the demodulator in the control room through the temperature measuring optical fiber, and the demodulator transmits the data to the upper industrial computer. Through the generated graphic screen query and comparison. Early warning of power cable intermediate joint accidents. Process the power cable intermediate joint with abnormal temperature before the accident. Eliminate the hazards of power cable intermediate joint accidents in advance to avoid huge direct and indirect economic losses caused by power outages and fires caused by accidents. Utility Model Content

[0003] The utility model aims to provide a temperature measuring structure of a temperature-sensitive optical fiber at an intermediate joint of a power cable to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above object, the utility model provides the following technical solution: a temperature sensing optical fiber temperature measurement structure at the middle joint of a power cable, comprising at least two power cables, all of which are connected to form a cable joint, including:

[0005] A temperature-sensitive optical fiber arranged on the cable joint, wherein the temperature-sensitive optical fiber is arranged on the cable joint by the cable tie, and the temperature-sensitive optical fiber is used to receive the temperature of the cable joint;

[0006] The output end of the temperature-sensitive optical fiber is connected to a temperature measuring host, which is used to receive the temperature signal transmitted by the temperature-sensitive optical fiber.

[0007] Preferably, the temperature-sensitive optical fiber is hyperbolic and is fully wrapped around the cable connector.

[0008] Preferably, there is at least one cable tie, which is used to fix the cable connector and the temperature-sensitive optical fiber.

[0009] Preferably, the temperature measuring host and the fire alarm system, the third-party monitoring platform and the network switch are all signal connected.

[0010] Preferably, the network switch is signal-connected to a monitoring station.

[0011] Compared with the prior art, the utility model has the following beneficial effects: the temperature sensing optical fiber is used in the temperature measurement structure of the middle joint of the power cable. The temperature measuring optical fiber is water-resistant, acid-resistant, alkali-resistant, bendable, tough, not easy to break, and has a service life of more than 30 years; the temperature measuring optical fiber samples light wave signals, is not interfered by the strong electric field under the high-voltage environment, and the data signal is reliable and stable; the temperature measurement distance is long, the positioning accuracy is high, and the temperature measurement accuracy is high; this temperature measuring optical fiber is inexpensive. It can continuously display and record the temperature of the middle joint of the power cable in real time with the upper monitoring industrial control computer, form historical temperature data reports, curve icons, and configure multiple early warning mode settings. The temperature monitoring of the middle joint of the power cable is targeted, continuous, and comparative. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of an embodiment of the utility model.

[0013] In the figure:

[0014] 1. Power cable 2. Cable connector 3. Temperature sensing optical fiber

[0015] 4. Cable tie 5. Temperature measuring host 6. Network switch

[0016] 7. Monitoring Station DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] like Figure 1As shown, the utility model provides a technical solution: a temperature sensing optical fiber in a power cable middle joint temperature measurement structure, including: a power cable 1, the power cable 1 is two ends, the middle connection is a cable joint 2, the power cable 1 is connected to the cable joint 2, because the cable joint 2 is the conductive conductor of the power cable 1 before the accident has been arced to the shielding layer, the main insulating material, the outer sheath, and the cable support object, so that the fault point generates high temperature or discharge, resulting in overheating of the power cable 1 middle joint, and finally causing a fire in the power cable 1 or a short circuit explosion at the middle joint, including: a temperature sensing optical fiber 3 arranged on the cable joint 2, a temperature sensing optical fiber 3 is attached to the cable joint 2. When the cable joint 2 has abnormal temperature, the temperature sensing optical fiber 3 can accurately capture and transmit the temperature abnormality signal to the temperature measuring host 5. The temperature sensing optical fiber 3 is arranged on the cable joint 2 by the tie 4. The number of tie 4 is certain to ensure that the temperature sensing optical fiber 3 will not be separated from the cable joint 2. The temperature sensing optical fiber 3 is used to receive the temperature of the cable joint 2. After receiving, the signal is transmitted to the temperature measuring host 5 through the pigtail of the cable joint 2. The output end of the cable joint 2 is connected to the temperature measuring host 5. The output end is the pigtail, which is used to receive the temperature signal transmitted by the temperature sensing optical fiber 3. The temperature signal is transmitted outward through the optical signal of the optical fiber. The temperature-sensitive optical fiber 3 is in a hyperbolic shape and is fully wrapped around the cable connector 2. Although the hyperbolic shape does not have the comprehensive coverage of the complete wrapping type, it reduces the consumption of the temperature-sensitive optical fiber 3. However, the coverage of the temperature-sensitive optical fiber 3 still covers the entire surface of the cable connector 2. There is at least one tie 4, which is used to fix the temperature-sensitive optical fiber 3 on the cable connector 2. Since the cable connector 2 is outdoors all year round and may have various accidents, it needs to be fixed by a number of tie ties 4, which are used to fix the cable connector 2 and the temperature-sensitive optical fiber 3 to measure the temperature. The host 5 and the fire alarm system, the third-party monitoring platform and the network switch 6 are all signal connected. The communication protocol of the connection is 285 / 232 / MODBUS. The temperature measuring host 5 is used to transmit the signal to the fire alarm system, the third-party monitoring platform and the network switch 6 respectively. The fire alarm system is used to issue an alarm when the temperature is Yichang. The third-party monitoring platform is used to monitor the temperature changes of the cable connector 2, thereby retaining the temperature data. The network switch 6 is used to transmit the temperature signal to the monitoring station 7, which is convenient for engineers to monitor. The network switch 6 signal is connected to the monitoring station 7.

[0019] According to the above, the present embodiment is a temperature measurement structure of a temperature-sensitive optical fiber 3 at the middle joint of a power cable 1, comprising a power cable 1, wherein the power cable 1 is connected to form a cable joint 2, comprising: a temperature-sensitive optical fiber 3 arranged on the cable joint 2, the temperature-sensitive optical fiber 3 being arranged on the cable joint 2 by a cable tie 4, the temperature-sensitive optical fiber 3 being used to receive the temperature of the cable joint 2, the output end of the temperature-sensitive optical fiber 3 being connected to a temperature measurement host 5, which is used to receive the temperature signal transmitted by the temperature-sensitive optical fiber 3, the temperature-sensitive optical fiber 3 being hyperbolic, fully wrapped around the cable joint 2, there being at least one cable tie 4, which is used to fix the cable joint 2 and the temperature-sensitive optical fiber 3, the temperature measurement host 5 and the fire alarm system, the third-party monitoring platform and the network switch 6 are all signal-connected, and the network switch 6 is signal-connected to a monitoring station 7.

[0020] The temperature-sensitive optical fiber 3 is hyperbolic and fully wrapped around the cable connector 2, and then tied to the cable connector 2 of the power cables 1 at both ends through cable ties 4. One end of the pigtail of the cable connector 2 is connected to the temperature measuring host 5, and the other end needs to be fused with the temperature-sensitive optical fiber 3 through a junction box. The end of the temperature-sensitive optical fiber 3 is sealed with grease. In order to accurately locate the hot spot position, the temperature measuring host 5 is then connected to the fire alarm system, the third-party monitoring platform and the network switch 6 through the communication protocol 285 / 232 / MODBUS. The network switch 6 transmits the network signal to the monitoring station 7, which is convenient for engineers to monitor.

[0021] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A temperature sensing optical fiber temperature measurement structure at a middle joint of a power cable, comprising at least two power cables, all of which are connected to form a cable joint, characterized in that: include: A temperature-sensitive optical fiber provided on the cable joint, wherein the temperature-sensitive optical fiber is provided on the cable joint by a tie, and the temperature-sensitive optical fiber is used to receive the temperature of the cable joint; The output end of the temperature-sensitive optical fiber is connected to a temperature measuring host, which is used to receive the temperature signal transmitted by the temperature-sensitive optical fiber.

2. The temperature sensing optical fiber temperature measuring structure at the middle joint of the power cable according to claim 1 is characterized by: The temperature-sensitive optical fiber is in a hyperbolic shape and is fully wrapped around the cable connector.

3. The temperature sensing optical fiber temperature measuring structure at the middle joint of a power cable according to any one of claims 1-2, characterized in that: There is at least one cable tie, which is used to fix the cable connector and the temperature-sensitive optical fiber.

4. The temperature sensing optical fiber temperature measuring structure at the middle joint of a power cable according to claim 1 or 2, characterized in that: The temperature measurement host is signal-connected to the fire alarm system, the third-party monitoring platform and the network switch.

5. The temperature sensing optical fiber temperature measurement structure at the middle joint of the power cable according to claim 4 is characterized by: The network switch is signal-connected to a monitoring station.

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