Intelligent early warning cable system

Abstract

The invention discloses an intelligent early-warning cable system, and the system comprises a magnesium oxide mineral insulated fireproof cable which is composed of a conductor, two hollow seamless round copper pipes, two transmission optical fiber units, a magnesium oxide powder insulating layer, and a sheath. The DAS is connected to the single-mode transmission optical fiber unit to detect vibration information of the magnesium oxide mineral insulated fireproof cable; the DTS distributed temperature sensor is connected to the multimode transmission optical fiber unit to detect the temperature information of the magnesium oxide mineral insulated fireproof cable; the data analysis module is connected to the DAS distributed sonic sensor and the DTS distributed temperature sensor, and determines a risk according to the vibration information detected by the DAS distributed sonic sensor and the temperature information detected by the DTS distributed temperature sensor; and the data early warning module is connected to the data analysis module and executes corresponding early warning measures according to the risk condition determined by the data analysis module. According to the intelligent early warning cable system, the intelligent early warning function of the rigid fireproof cable can be realized.

Description

Technical Field

[0001] The invention belongs to the technical field of cable detection, and in particular relates to an intelligent early warning cable system. Background Art

[0002] Magnesium oxide mineral insulated cable is a copper core copper sheathed cable with mineral material magnesium oxide powder as insulator. If necessary, a plastic outer anti-corrosion sheath is extruded outside the annealed metal sheath. Magnesium oxide mineral insulated cable has the characteristics of high temperature resistance, fire resistance, explosion resistance, non-combustion (can run continuously for a long time at 250°C), large current carrying capacity, small outer diameter, high mechanical strength and long service life. It is suitable for historical buildings, super high-rise buildings, hotels, shopping malls, hospitals, airports, TV stations, communication hub projects, ships, theaters, subways, civil air defense projects, public places with dense traffic, dangerous places prone to fire (such as gas plants, chemical plants, refineries, offshore oil platforms, etc.). It can also be used in places with high ambient temperature, such as power plants and steel plants. It is also used in special environments such as anti-electromagnetic interference, anti-animal biting, waterproof and nuclear power plants. Magnesium oxide mineral insulated cables are currently widely used in fire power supply systems, and will play the role of power transmission in special environments such as fires, and the safety requirements for cables are particularly high.

[0003] Modern intelligent technology can detect and alarm the temperature, vibration, stress, etc. of cable operation in real time, and prevent damage to the cable caused by construction excavation, theft, etc. Its function is mainly realized by adding a sensing light unit in the cable, giving a patrol light signal through one end of the cable, and receiving light reflection and restoring data processing technology to simulate the detection function. However, this technology can only be implemented in flexible fireproof cables at present. There is no such product in rigid fireproof cables with higher fire protection levels. The reason is that the production process of rigid fireproof cables does not support the setting of light unit structure in the cable.

[0004] The product structure of rigid fireproof cable is mainly composed of solid copper conductor, dense magnesium oxide powder insulation layer and copper sheath. There are currently two main production and processing methods, one is the magnesium oxide porcelain column assembly and drawing production process, and the other is the magnesium oxide powder filling copper strip argon arc welding continuous welding rolling production process. Both of these production and processing processes compress the cable to gradually reduce the outer diameter of the cable and extend the length due to extrusion. Under such a production process, all parts of the cable will be stretched in overall length during the production process. The transmission medium optical fiber in the optical unit is made of glass fiber, and its elongation is quite small, which does not support the extension requirements brought by the drawing or rolling process of the rigid fireproof cable. Therefore, the intelligent early warning function of the rigid fireproof cable cannot be realized by the existing technology. Summary of the invention

[0005] The present invention provides an intelligent early warning cable system to solve the above-mentioned technical problems, and specifically adopts the following technical solutions:

[0006] An intelligent early warning cable system, comprising:

[0007] A magnesium oxide mineral insulated fireproof cable, the magnesium oxide mineral insulated fireproof cable comprising a conductor, two hollow seamless round copper tubes, two transmission optical fiber units, a magnesium oxide powder insulation layer and a sheath, the two transmission optical fiber units are respectively arranged in the two hollow seamless round copper tubes, one of the two transmission optical fiber units is a single-mode optical fiber, and the other is a multi-mode optical fiber, the conductor and the two hollow seamless round copper tubes are arranged in the sheath at intervals, and the magnesium oxide powder insulation layer is filled in the gap between the conductor, the two hollow seamless round copper tubes and the sheath;

[0008] DAS distributed acoustic wave sensor, connected to the single-mode transmission optical fiber unit to detect vibration information of the magnesium oxide mineral insulated fire-resistant cable;

[0009] DTS distributed temperature sensor, connected to the multi-mode transmission optical fiber unit to detect the temperature information of the magnesium oxide mineral insulated fire-resistant cable;

[0010] a data analysis module, connected to the DAS distributed acoustic wave sensor and the DTS distributed temperature sensor, and determining a risk situation according to vibration information detected by the DAS distributed acoustic wave sensor and temperature information detected by the DTS distributed temperature sensor;

[0011] The data early warning module is connected to the data analysis module and executes corresponding early warning measures according to the risk situation determined by the data analysis module.

[0012] Further, the transmission optical fiber unit comprises a plurality of optical fibers, a curing layer and a protective layer;

[0013] A plurality of optical fibers are closely attached to each other and arranged in the sheath, and the solidified layer is filled in the gap between the optical fibers and the sheath;

[0014] The outer surface of the protective layer is provided with a plurality of tooth-shaped portions distributed at equal intervals along the extension direction of the protective layer, and the outer surface of the protective layer and the inner surface of the hollow seamless round copper tube are divided into a plurality of pressure channels by the plurality of tooth-shaped portions.

[0015] Furthermore, the specific method of installing the transmission optical fiber unit to the hollow seamless round copper tube is:

[0016] A plugging piece is arranged at one end of the transmission optical fiber unit, and high-pressure gas is injected through the pressure channel to push the transmission optical fiber unit to move along the hollow seamless round copper tube until it is completely moved to a preset position.

[0017] Furthermore, the number of the tooth-shaped portions is greater than or equal to 6, the cross-section of the tooth-shaped portion is trapezoidal, the top width of the tooth-shaped portion away from the protective layer is 1 to 3 mm, the bottom width of the tooth-shaped portion is 3 to 5 mm, the height of the tooth-shaped portion is 1 to 2 mm, and the average gap between the tooth-shaped portion and the inner wall of the hollow seamless round copper tube is 0.05 to 0.10 mm.

[0018] Furthermore, a lubricating layer is provided on the top of the toothed portion.

[0019] Furthermore, when the data analysis module determines that the temperature value at a certain location reaches a first threshold and lasts for a preset time based on the detection information of the DTS distributed temperature sensor, the data warning module sends a first warning message to the risk responsible person, and the first warning message includes the temperature value and location information.

[0020] Furthermore, when the data analysis module determines that the temperature value at a certain location reaches a second threshold and lasts for a preset time based on the detection information of the DTS distributed temperature sensor, the data warning module determines the nearest fire unit based on the location information and automatically reports an alarm to the determined fire unit, and the second threshold is greater than the first threshold.

[0021] Furthermore, when the data analysis module determines that a certain type of vibration abnormality exists at a certain location based on the detection information of the DAS distributed acoustic wave sensor, the data warning module sends a third warning message to the risk responsible person, and the third warning message includes the abnormality type and location information.

[0022] Furthermore, the intelligent early warning cable system also includes a data acquisition module. When the data analysis module determines that there is a vibration abnormality with an intrusion risk at a certain location based on the detection information of the DAS distributed acoustic wave sensor, the data acquisition module is used to send information acquisition request information to the construction unit subsystem. When the construction unit subsystem receives the information acquisition request information, it obtains the positioning information of all excavation equipment registered in the subsystem in real time, and then sends the acquired positioning information of all excavation equipment and the corresponding equipment operator information to the data acquisition module. The data analysis module determines whether there is an excavation equipment at the current determined location based on the location information of the determined location and the positioning information of all excavation equipment acquired by the data acquisition module. If there is an excavation equipment, the data early warning module sends a fourth early warning information to the risk responsible person. The fourth early warning information includes the equipment operator information of the excavation equipment. The risk responsible person contacts the corresponding equipment operator after receiving the fourth early warning information.

[0023] Furthermore, the intelligent early warning cable system also includes:

[0024] The positioning module is used to continuously obtain the location of the risk responsible person after the risk responsible person receives the first warning information and / or the third warning information, so as to determine whether the risk responsible person arrives at the risk location at a predetermined time.

[0025] The benefit of the present invention lies in that the provided intelligent early warning cable system can realize the intelligent early warning function of the rigid fireproof cable.

[0026] The invention is beneficial in that the intelligent early warning cable system provided can automatically give an alarm for emergency high temperature situations and can also predict and stop excavation operations in advance. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0028] Figure 1 is a schematic diagram of the intelligent early warning cable system of the present application;

[0029] Figure 2 is a schematic diagram of a magnesium oxide mineral insulated fireproof cable of the intelligent early warning cable system of the present application;

[0030] Figure 3 is a schematic diagram of a transmission optical fiber unit of the magnesium oxide mineral insulated fireproof cable of the present application;

[0031] Conductor 10 , hollow seamless round copper tube 20 , transmission optical fiber unit 30 , optical fiber 31 , solidified layer 32 , protective layer 33 , toothed portion 34 , pressure channel 35 , magnesium oxide powder insulation layer 40 , and sheath 50 . DETAILED DESCRIPTION

[0032] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0033] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0035] like Figure 1 The present application shows an intelligent early warning cable system, which includes: a magnesium oxide mineral insulated fireproof cable, a DAS distributed acoustic wave sensor, a DTS distributed temperature sensor, a data analysis module and a data early warning module.

[0036] Among them, Figure 2 and 3 As shown, the magnesium oxide mineral insulated fireproof cable is composed of a conductor 10, two hollow seamless round copper tubes 20, two transmission optical fiber units 30, a magnesium oxide powder insulation layer 40 and a sheath 50. The two transmission optical fiber units 30 are respectively arranged in the two hollow seamless round copper tubes 20. One of the two transmission optical fiber units 30 is a single-mode optical fiber 31, and the other is a multi-mode optical fiber 31. The conductor 10 and the two hollow seamless round copper tubes 20 are arranged in the sheath 50 at intervals, and the magnesium oxide powder insulation layer 40 is filled in the gap between the conductor 10, the two hollow seamless round copper tubes 20 and the sheath 50. Specifically, the conductor 10 is a Class 1 solid copper conductor 10. The sheath 50 is a copper sheath 50.

[0037] In the embodiment of the present application, the transmission optical fiber unit 30 comprises a plurality of optical fibers 31, a solidifying layer 32 and a protective layer 33. The plurality of optical fibers 31 are closely attached to each other and arranged in the protective layer 33. The solidifying layer 32 fills the gap between the optical fibers 31 and the protective layer 33.

[0038] The outer surface of the protective layer 33 is provided with a plurality of equally spaced tooth-shaped portions 34 along the extending direction of the protective layer 33 . The outer surface of the protective layer 33 and the inner surface of the hollow seamless round copper tube 20 are divided into a plurality of pressure channels 35 by the plurality of tooth-shaped portions 34 .

[0039] In the present application, the magnesium oxide mineral insulated fireproof cable is post-compounded on-site to divide the cable into two parts: a power cable with a pre-buried hollow seamless round copper tube 20 and a transmission optical fiber unit 30, thereby solving the problem that the magnesium oxide mineral insulated fireproof cable cannot be processed into an optical fiber 31 composite cable.

[0040] The power cable of the pre-buried hollow seamless round copper tube 20 adopts the rolling production process of magnesium oxide powder filled copper strip argon arc welding continuous welding method. The copper strip is continuously longitudinally rolled by multiple forming rollers, from a straight shape to an arc, then to a semicircle, and finally to a circle. The joints are continuously welded by argon arc welding to form a hollow seamless round copper tube 20. During welding, the copper rod is pulled and magnesium oxide powder is filled simultaneously. After welding, the finished product is made by multiple continuous rolling and annealing. This production process method greatly increases the manufacturing length of the cable. Since the cable is compressed and deformed by multiple passes, the magnesium oxide powder is compacted and the density reaches 2.2-2.8g / cm3, which meets the withstand voltage performance of 2.5kV / 1min. The processing technology of multiple compression deformation makes it difficult to add other plastic components to the cable structure to increase other performance.

[0041] After the power cable and the transmission optical fiber unit 30 embedded in the hollow seamless round copper tube 20 are respectively manufactured, the specific method of installing the transmission optical fiber unit 30 to the hollow seamless round copper tube 20 is as follows: a plugging piece is set at one end of the transmission optical fiber unit 30, and high-pressure gas is injected through the pressure channel 35 to push the transmission optical fiber unit 30 to move along the hollow seamless round copper tube 20 until it is completely moved to the preset position. The transmission optical fiber unit 30 is suspended in the hollow seamless round copper tube 20 by high-pressure gas to reduce the friction between the transmission optical fiber unit 30 and the hollow seamless round copper tube 20. Preferably, the pressure of the high-pressure gas is 3.5-5.5MPa, and the gas flow rate is greater than 10m3 / min.

[0042] In the embodiment of the present application, the wall thickness of the hollow seamless round copper tube 20 is 0.3-1.0 mm, the inner wall of the tube is smooth and round, and there is no protrusion greater than 0.1 m in height. The inner diameter of the hollow seamless round copper tube 20 is designed according to the tooth profile size of the transmission optical fiber unit 30, and the assembly gap between the tooth profile of the transmission optical fiber unit 30 and the copper tube is 0.05-0.10 mm, which is convenient for assembly.

[0043] In an embodiment of the present application, the number of tooth-shaped portions 34 is greater than or equal to 6, the cross-section of the tooth-shaped portion 34 is trapezoidal, the top width of the tooth-shaped portion 34 away from the protective layer 33 is 1 to 3 mm, the bottom width of the tooth-shaped portion 34 is 3 to 5 mm, the height of the tooth-shaped portion 34 is 1 to 2 mm, and the average gap between the tooth-shaped portion 34 and the inner wall of the hollow seamless round copper tube 20 is 0.05 to 0.10 mm.

[0044] In an optional embodiment, a lubricating layer (not shown) is further provided on the top of the toothed portion 34 , and the lubricating layer further improves the efficiency of inserting the transmission optical fiber unit 30 into the hollow seamless round copper tube 20 .

[0045] The DAS distributed acoustic wave sensor is connected to the single-mode transmission optical fiber unit 30 to detect the vibration information of the magnesium oxide mineral insulated fireproof cable. The DTS distributed temperature sensor is connected to the multi-mode transmission optical fiber unit 30 to detect the temperature information of the magnesium oxide mineral insulated fireproof cable. The data analysis module is connected to the DAS distributed acoustic wave sensor and the DTS distributed temperature sensor, and determines the risk situation based on the vibration information detected by the DAS distributed acoustic wave sensor and the temperature information detected by the DTS distributed temperature sensor. The data early warning module is connected to the data analysis module, and executes corresponding early warning measures according to the risk situation determined by the data analysis module.

[0046] In the implementation mode of the present application, when the data analysis module determines that the temperature value of a certain position reaches the first threshold value and lasts for a preset time according to the detection information of the DTS distributed temperature sensor, the data warning module sends a first warning message to the risk responsible person, and the first warning message includes the temperature value and the location information. The transmission optical fiber unit 30 is connected to the DTS distributed temperature sensor to monitor the internal temperature of the cable core in real time during the operation of the cable. The data analysis module can determine whether there is a high temperature risk point based on the real-time detection data, and determine the location. The temperature measurement accuracy is ±1°C, and the damaged point can be remotely diagnosed and located. When the temperature inside the cable core rises, the good thermal conductivity of the seamless round copper tube causes the temperature of the seamless round copper tube to rise accordingly, and the temperature is transmitted to the multi-mode transmission optical fiber unit 30 in the seamless round copper tube. The DTS system uses the Raman single-mode optical time domain ROTDR principle. In the time domain, using OTDR technology, different temperature points can be located according to the transmission rate of light in the optical fiber and the time difference between the incident light and the backward Raman scattered light, so that the temperature along the entire optical fiber can be obtained and accurately located.

[0047] When the temperature is detected to be higher than the first threshold, it indicates that there are certain problems or safety hazards in the operation of the cable, and the person responsible for the risk needs to be notified in time to conduct risk investigation at the problem site.

[0048] In an embodiment of the present application, when the data analysis module determines that the temperature value at a certain location reaches a second threshold and lasts for a preset time based on the detection information of the DTS distributed temperature sensor, the data warning module determines the nearest fire unit based on the location information and automatically reports an alarm to the determined fire unit, and the second threshold is greater than the first threshold.

[0049] It is understandable that when the temperature at a certain point of the cable is very high (second threshold), there is a high possibility that there is an abnormal state such as fire at that location of the cable. At this time, if the risk responsible person is only notified to conduct risk investigation, the best time to deal with the fire may be missed. Therefore, in order to solve such a technical problem, when it is determined that the temperature value at a certain location of the cable reaches the second threshold and lasts for a preset time, an alarm is directly sent to the nearest fire department.

[0050] In an embodiment of the present application, when the data analysis module determines that a certain type of vibration abnormality exists at a certain location based on the detection information of the DAS distributed acoustic wave sensor, the data warning module sends a third warning message to the risk responsible person, and the third warning message includes the abnormality type and location information.

[0051] Connect the transmission fiber unit 30 to the DAS distributed acoustic sensor to detect abnormal vibrations during cable movement. The system uses distributed optical fiber acoustic wave detection and sensing technology to sense external vibration information near the cable and analyze the signal characteristics of different events such as excavation, vehicle passing, and manual operations. It can identify perimeter intrusion, oil and gas pipeline protection, power pipeline protection, overhead line wind dance, submarine cable anchor damage monitoring, high-speed rail positioning, belt conveyor abnormal sound monitoring, etc. No missed reports, high fidelity, hear clearly and understand. The detection distance is 50km and the positioning accuracy is 2m. When the cable is impacted by external force or cut and stolen, the seamless round copper tube has good sound transmission performance, and transmits the sound or vibration to the single-mode transmission fiber unit 30 in the seamless round copper tube. The DAS system uses pulse modulated laser to emit into the optical fiber, and through the scattering effect of the optical fiber, it senses the sound wave / vibration information at all positions on the entire optical cable and accurately locates it.

[0052] In the implementation of the present application, the intelligent early warning cable system also includes a data acquisition module. When the data analysis module determines that there is a vibration anomaly with an intrusion risk at a certain location based on the detection information of the DAS distributed acoustic wave sensor, the data acquisition module is used to send information acquisition request information to the construction unit subsystem. When the construction unit subsystem receives the information acquisition request information, it obtains the positioning information of all excavation equipment registered in the subsystem in real time, and then sends the acquired positioning information of all excavation equipment and the corresponding equipment operator information to the data acquisition module. The data analysis module determines whether there is an excavation equipment at the current determined location based on the location information of the determined location and the positioning information of all excavation equipment acquired by the data acquisition module. If there is an excavation equipment, the data early warning module sends a fourth early warning information to the risk responsible person. The fourth early warning information includes the equipment operator information of the excavation equipment. The risk responsible person contacts the corresponding equipment operator after receiving the fourth early warning information. Here, the subsystem can be a part of the intelligent early warning cable system, or it can be an external third-party system connected to the intelligent early warning cable system.

[0053] It is understandable that cables are often cut at some excavation sites. Most of the existing technologies can only identify abnormal conditions after the cables are cut. At this point, it is too late. Therefore, in this application, when the data analysis module determines that there is a vibration abnormality with an intrusion risk at a certain location based on the detection information of the DAS distributed acoustic wave sensor (the construction characteristics of the excavator can be identified based on the vibration information), the equipment and construction personnel performing excavation operations at the location can be directly identified. Before the cable is cut, the person responsible for the risk directly contacts the construction personnel to avoid the cable being cut.

[0054] In an embodiment of the present application, the intelligent early warning cable system further includes: a positioning module.

[0055] The positioning module is used to continuously obtain the location of the risk responsible person after the risk responsible person receives the first warning information and / or the third warning information to determine whether the risk responsible person arrives at the risk location at the scheduled time. The risk responsible person is supervised to ensure that he completes the risk investigation on time.

[0056] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the above embodiments do not limit the present invention in any form, and any technical solution obtained by equivalent replacement or equivalent transformation falls within the protection scope of the present invention.

Claims

1. An intelligent early warning cable system, characterized in that: Include: A magnesium oxide mineral insulated fireproof cable, the magnesium oxide mineral insulated fireproof cable comprising a conductor, two hollow seamless round copper tubes, two transmission optical fiber units, a magnesium oxide powder insulation layer and a sheath, the two transmission optical fiber units are respectively arranged in the two hollow seamless round copper tubes, one of the two transmission optical fiber units is a single-mode optical fiber, and the other is a multi-mode optical fiber, the conductor and the two hollow seamless round copper tubes are arranged in the sheath at intervals, and the magnesium oxide powder insulation layer is filled in the gap between the conductor, the two hollow seamless round copper tubes and the sheath; DAS distributed acoustic wave sensor, connected to the single-mode transmission optical fiber unit to detect vibration information of the magnesium oxide mineral insulated fire-resistant cable; DTS distributed temperature sensor, connected to the multi-mode transmission optical fiber unit to detect the temperature information of the magnesium oxide mineral insulated fire-resistant cable; a data analysis module, connected to the DAS distributed acoustic wave sensor and the DTS distributed temperature sensor, and determining a risk situation according to vibration information detected by the DAS distributed acoustic wave sensor and temperature information detected by the DTS distributed temperature sensor; The data early warning module is connected to the data analysis module and executes corresponding early warning measures according to the risk situation determined by the data analysis module.

2. The intelligent early warning cable system according to claim 1 is characterized in that: The transmission optical fiber unit comprises a plurality of optical fibers, a curing layer and a protective layer; A plurality of optical fibers are closely attached to each other and arranged in the sheath, and the solidified layer is filled in the gap between the optical fibers and the sheath; The outer surface of the protective layer is provided with a plurality of tooth-shaped portions distributed at equal intervals along the extension direction of the protective layer, and the outer surface of the protective layer and the inner surface of the hollow seamless round copper tube are divided into a plurality of pressure channels by the plurality of tooth-shaped portions.

3. The intelligent early warning cable system according to claim 2 is characterized in that: The specific method of installing the transmission optical fiber unit to the hollow seamless round copper tube is: A plugging piece is arranged at one end of the transmission optical fiber unit, and high-pressure gas is injected through the pressure channel to push the transmission optical fiber unit to move along the hollow seamless round copper tube until it is completely moved to a preset position.

4. The intelligent early warning cable system according to claim 2 is characterized in that: The number of the tooth-shaped portions is greater than or equal to 6, the cross-section of the tooth-shaped portion is trapezoidal, the top width of the tooth-shaped portion away from the protective layer is 1 to 3 mm, the bottom width of the tooth-shaped portion is 3 to 5 mm, the height of the tooth-shaped portion is 1 to 2 mm, and the average gap between the tooth-shaped portion and the inner wall of the hollow seamless round copper tube is 0.05 to 0.10 mm.

5. The intelligent early warning cable system according to claim 2 is characterized in that: A lubricating layer is provided on the top of the toothed portion.

6. The intelligent early warning cable system according to claim 1 is characterized in that: When the data analysis module determines, based on the detection information of the DTS distributed temperature sensor, that the temperature value at a certain location reaches a first threshold and lasts for a preset time, the data warning module sends a first warning message to the risk responsible person, where the first warning message includes the temperature value and location information.

7. The intelligent early warning cable system according to claim 6 is characterized in that: When the data analysis module determines, based on the detection information of the DTS distributed temperature sensor, that the temperature value at a certain location reaches a second threshold and lasts for a preset time, the data warning module determines the nearest fire-fighting unit based on the location information and automatically reports an alarm to the determined fire-fighting unit, and the second threshold is greater than the first threshold.

8. The intelligent early warning cable system according to claim 1 is characterized in that: When the data analysis module determines that a certain type of vibration abnormality exists at a certain location based on the detection information of the DAS distributed acoustic wave sensor, the data warning module sends a third warning message to the risk responsible person, and the third warning message includes the abnormality type and location information.

9. The intelligent early warning cable system according to claim 8, characterized in that: The intelligent early warning cable system also includes a data acquisition module. When the data analysis module determines that there is a vibration anomaly with an intrusion risk at a certain location based on the detection information of the DAS distributed acoustic wave sensor, the data acquisition module is used to send information acquisition request information to the construction unit subsystem. When the construction unit subsystem receives the information acquisition request information, it obtains the positioning information of all excavation equipment registered in the subsystem in real time, and then sends the acquired positioning information of all excavation equipment and the corresponding equipment operator information to the data acquisition module. The data analysis module determines whether there is an excavation equipment at the current determined location based on the location information of the determined location and the positioning information of all excavation equipment acquired by the data acquisition module. If there is an excavation equipment, the data early warning module sends a fourth early warning information to the risk responsible person. The fourth early warning information includes the equipment operator information of the excavation equipment. The risk responsible person contacts the corresponding equipment operator after receiving the fourth early warning information.

10. The intelligent early warning cable system according to any one of claims 6 and 8, characterized in that: The intelligent early warning cable system also includes: The positioning module is used to continuously obtain the location of the risk responsible person after the risk responsible person receives the first warning information and / or the third warning information, so as to determine whether the risk responsible person arrives at the risk location at a predetermined time.

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