CN113345635B - Long-life radiation-resistant field bus cable used near nuclear island reactor core of nuclear power station - Google Patents
Long-life radiation-resistant field bus cable used near nuclear island reactor core of nuclear power station Download PDFInfo
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- CN113345635B CN113345635B CN202110601251.5A CN202110601251A CN113345635B CN 113345635 B CN113345635 B CN 113345635B CN 202110601251 A CN202110601251 A CN 202110601251A CN 113345635 B CN113345635 B CN 113345635B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/02—Disposition of insulation
- H01B7/0208—Cables with several layers of insulating material
- H01B7/0216—Two layers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
- H01B7/295—Protection against damage caused by extremes of temperature or by flame using material resistant to flame
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/42—Insulated conductors or cables characterised by their form with arrangements for heat dissipation or conduction
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/42—Insulated conductors or cables characterised by their form with arrangements for heat dissipation or conduction
- H01B7/421—Insulated conductors or cables characterised by their form with arrangements for heat dissipation or conduction for heat dissipation
- H01B7/423—Insulated conductors or cables characterised by their form with arrangements for heat dissipation or conduction for heat dissipation using a cooling fluid
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
Abstract
The application discloses a long-life radiation-resistant field bus cable for the vicinity of a nuclear island reactor core of a nuclear power station, which sequentially comprises an outer sheath and a total inner sheath from outside to inside, wherein a tensile rope, a signal cable core and a power cable core are arranged in the total inner sheath, and the power cable core sequentially comprises a first inner sheath, a flame-retardant layer, a first insulating layer and a first conductor from outside to inside; the signal cable core includes in proper order from outside to inside sheath, external shield, middle shielding layer and the internal shield layer of second, the internal shield layer has heart yearn and filling rope, the heart yearn includes the second insulating layer of second conductor and cladding second conductor. The cable of this application shields effectually, and is effectual to the protection of cable.
Description
Technical Field
The application relates to the field of cables, in particular to a long-life radiation-resistant field bus cable for the vicinity of a nuclear island reactor core of a nuclear power station.
Background
The Field bus (Field bus) is an industrial data bus which is rapidly developed in recent years, and mainly solves the problems of digital communication among Field devices such as intelligent instruments, controllers and actuators in an industrial Field and information transmission between the Field control devices and a high-level control system. The field bus has a series of outstanding advantages of simplicity, reliability, economy, practicality and the like, and is widely used in the current nuclear power station, but due to relatively high radiation in the nuclear power station, the shielding performance of the cable applied to the nuclear power station equipment needs to be considered more, and the existing bus cable can only carry out signal transmission, but the linkage work of a plurality of equipment sometimes needs not only signal transmission but also power transmission, and the harsh environment of the nuclear power station and the complexity among the working equipment put higher requirements on the field bus cable of the nuclear power station.
Disclosure of Invention
The purpose of the invention is as follows: the application aims to overcome the defects of the prior art and provides the long-life radiation-resistant field bus cable used near the nuclear island core of the nuclear power station.
The technical scheme is as follows: a long-life anti-radiation field bus cable for a nuclear island reactor core of a nuclear power station sequentially comprises an outer sheath and a total inner sheath from outside to inside, wherein a tensile rope, a signal cable core and a power cable core are arranged in the total inner sheath, and the power cable core sequentially comprises a first inner sheath, a flame retardant layer, a first insulating layer and a first conductor from outside to inside; the signal cable core includes in proper order from outside to inside sheath, external shield, middle shielding layer and the internal shield layer of second, the internal shield layer has heart yearn and filling rope, the heart yearn includes the second insulating layer of second conductor and cladding second conductor.
Further, the filling rope is a tubular filling rope; the first inner protective layer, the second inner protective layer and the total inner protective layer are all made of polyethylene materials; the flame-retardant layer is a low-smoke halogen-free flame-retardant layer; the first conductor is a copper conductor; the second conductor is a silver-plated copper alloy stranded conductor; the outer sheath is made of a cross-linked ethylene-tetrafluoroethylene copolymer material.
Further, the inner shielding layer and the outer shielding layer are both tinned copper wire braided shielding layers; the middle shielding layer is a polyimide film shielding layer or an aluminum-plastic composite belt shielding layer.
The protection device comprises a control unit and a protection unit, wherein the protection unit comprises a fixed protection unit and a movable protection unit, the fixed protection unit comprises a plurality of first enclosing cylinders, a plurality of connecting ribs are connected between every two adjacent first enclosing cylinders, one of the two first enclosing cylinders at the two extreme ends is connected with a first end cylinder, the other one of the two first enclosing cylinders is connected with a second end cylinder, a first motor is installed at the first end cylinder and drives a first screw rod, a second motor is installed at the second end cylinder and drives a second screw rod; the movable protection unit comprises a first pipe part, a second pipe part and a plurality of second surrounding pipes, wherein the first surrounding pipes and the second surrounding pipes are circular cylindrical, the inner diameter of each second surrounding pipe is equal to the outer diameter of each first surrounding pipe, the first pipe part is fixedly connected with all the second surrounding pipes, the second pipe part is fixedly connected with all the second surrounding pipes, one end of the first pipe part is closed, the other end of the first pipe part is connected with a first air chamber, the first air chamber is located at the first end part pipe and can slide along the length direction of the first end part pipe, the first air chamber is connected with a fire extinguishing gas storage unit through a first air inlet pipe, and a valve is arranged at the first air inlet pipe; one end of the second pipe part is closed, the other end of the second pipe part is connected with a second air chamber, a second air inlet pipe is arranged at the second air chamber, a fan is arranged at the second air inlet pipe, the second air chamber is positioned at the second end barrel, and the second air chamber can slide along the length direction of the second end barrel; the number of the second enclosing cylinders is one less than that of the first enclosing cylinders, a first movable block is fixed at the position, closest to the second enclosing cylinder of the first end part cylinder, of the second enclosing cylinder, a first threaded hole matched with the first screw rod is formed in the position of the first movable block, a second movable block is fixed at the position, closest to the second end part cylinder, of the second enclosing cylinder, and a second threaded hole matched with the second screw rod is formed in the position of the second movable block; the part of the first pipe part, which is positioned in the second enclosure cylinder, is provided with a first air outlet hole communicated with the interior of the second enclosure cylinder; the part of the second pipe part between the two second enclosing cylinders is provided with a second air outlet hole; a temperature sensor is installed at least one first enclosure of the first enclosures, and a smoke sensor is installed at least one first enclosure of the first enclosures.
Further, the first end cylinder is connected with a first fixing plate through a plurality of first supporting rods; the second end cylinder is connected with a second fixing plate through a plurality of second supporting rods; at least one of the other second enclosing cylinders except the two second enclosing cylinders at the most end part is connected with a connecting plate, a sliding seat is fixed at the connecting plate, the sliding seat can slide along a limiting sliding rail, and the limiting sliding rail is installed at a third fixing plate.
So that the first, second and third fixing plates can be fixed to support and fix the protection unit; the third fixing plate may be designed to be plural, so that when the protection unit is too long, the third fixing plate may be used for supporting.
Further, the first pipe portion and the second pipe portion each have two; two first pipe portions are located same level, and two second pipe portions are located same level, and two first pipe portions are higher than two second pipe portions.
Further, a first sliding rail is arranged at the first end barrel, and a first sliding groove matched with the first sliding rail is arranged at the first air chamber; the second end cylinder is provided with a second sliding rail, and the second air chamber is provided with a second sliding groove matched with the second sliding rail.
So that the sliding of the first air chamber and the second air chamber is more stable.
Furthermore, a limiting groove is formed in the outer side of the first enclosing barrel, and a limiting convex rib matched with the limiting groove is formed in the inner side of the second enclosing barrel.
Further, the first end cylinder and the second end cylinder are both circular cylinder-shaped; the length of a plurality of first enclosing barrels is the same, the length of a plurality of second enclosing barrels is the same, and the length of the second enclosing barrels is larger than that of the first enclosing barrels.
Further, fixed protection unit department has a plurality of spacing recesses, the quantity of spacing recess equals the quantity and the one-to-one correspondence of the splice bar that single first surrounding barrel one side has, and every spacing recess connection all first surrounding barrels and all splice bars that this spacing recess corresponds, the inboard of second surrounding barrel has spacing protruding muscle, and the quantity of the spacing protruding muscle that every second surrounding barrel has equals the quantity of spacing recess.
Further, the first surrounding barrel and the second surrounding barrel are provided with tinned copper wire shielding interlayers.
Of course, other forms of shielding layers may be used, and the shielding interlayers of the first and second enclosures actually form shielding protection for the outermost periphery of the cable body, so as to avoid radiation interference.
Furthermore, the protection unit has a plurality of, and a plurality of protection units are arranged in a row.
Further, all of the first enclosure tubes and all of the second enclosure tubes enclose the bus cable body.
Furthermore, 6 connecting ribs are connected between every two adjacent first enclosing cylinders; 6 splice bars are the annular equidistant distribution.
Further, 6 limiting grooves are formed in the fixed protection unit; each second enclosing cylinder is provided with 6 limiting convex ribs on the inner side.
Thereby spacing recess cooperation spacing protruding muscle makes the activity protective unit remove more stably for fixed protective unit.
Further, the first enclosing cylinder and the second enclosing cylinder are both made of PVC materials.
Furthermore, the number of the first motor, the number of the first screw rod and the number of the first movable block are two; the second motor, the second screw rod and the second movable block are all provided with two.
When the movable protection unit is moved, the two first motors and the two second motors are used for synchronous driving, so that the driving of the movable protection unit is more stable.
Further, a temperature sensor and a smoke sensor are simultaneously installed at least one first enclosure of the plurality of first enclosures. That is to say, the temperature sensor and the smoke sensor are installed at the at least one first enclosure at the same time, so that the detection of temperature and smoke is realized.
Further, at least one first enclosure of any consecutive 10 first enclosures is simultaneously mounted with a temperature sensor and a smoke sensor.
Further, the first motor, the second motor, the valve, the fan, all the temperature sensors and all the smoke sensors are connected with the controller.
Further, the fire suppressing gas is carbon dioxide.
In addition, the application also discloses a cable, which comprises a cable body, a control unit and a protection unit, wherein the protection unit comprises a fixed protection unit and a movable protection unit, the fixed protection unit comprises a plurality of first enclosing cylinders, a plurality of connecting ribs are connected between every two adjacent first enclosing cylinders, one of the two first enclosing cylinders positioned at the two most two ends is connected with a first end part cylinder, the other one of the two first enclosing cylinders is connected with a second end part cylinder, a first motor is installed at the first end part cylinder and drives a first screw rod, a second motor is installed at the second end part cylinder and drives a second screw rod; the movable protection unit comprises a first pipe part, a second pipe part and a plurality of second surrounding pipes, wherein the first surrounding pipes and the second surrounding pipes are circular cylindrical, the inner diameter of each second surrounding pipe is equal to the outer diameter of each first surrounding pipe, the first pipe part is fixedly connected with all the second surrounding pipes, the second pipe part is fixedly connected with all the second surrounding pipes, one end of the first pipe part is closed, the other end of the first pipe part is connected with a first air chamber, the first air chamber is located at the first end part pipe and can slide along the length direction of the first end part pipe, the first air chamber is connected with a fire extinguishing gas storage unit through a first air inlet pipe, and a valve is arranged at the first air inlet pipe; one end of the second pipe part is closed, the other end of the second pipe part is connected with a second air chamber, a second air inlet pipe is arranged at the second air chamber, a fan is arranged at the second air inlet pipe, the second air chamber is positioned at the second end barrel, and the second air chamber can slide along the length direction of the second end barrel; the number of the second enclosing cylinders is one less than that of the first enclosing cylinders, a first movable block is fixed at the position, closest to the second enclosing cylinder of the first end part cylinder, of the second enclosing cylinder, a first threaded hole matched with the first screw rod is formed in the position of the first movable block, a second movable block is fixed at the position, closest to the second end part cylinder, of the second enclosing cylinder, and a second threaded hole matched with the second screw rod is formed in the position of the second movable block; the part of the first pipe part, which is positioned in the second enclosure cylinder, is provided with a first air outlet hole communicated with the interior of the second enclosure cylinder; the part of the second pipe part between the two second enclosing cylinders is provided with a second air outlet hole; a temperature sensor is installed at least one first enclosure of the first enclosures, and a smoke sensor is installed at least one first enclosure of the first enclosures.
The cable body can select the cable with heat dissipation requirement and flame retardant requirement or shielding requirement in any working process.
Further, the first end barrel is connected with a first fixing plate through a plurality of first supporting rods; the second end cylinder is connected with a second fixing plate through a plurality of second supporting rods; at least one of the other second enclosing cylinders except the two second enclosing cylinders at the most end part is connected with a connecting plate, a sliding seat is fixed at the connecting plate, the sliding seat can slide along a limiting sliding rail, and the limiting sliding rail is installed at a third fixing plate.
Further, the first surrounding barrel and the second surrounding barrel are provided with tinned copper wire shielding interlayers.
Has the advantages that: the utility model provides a cable can effectively be applicable to near nuclear power station nuclear island reactor core with long-life antiradiation field bus cable, the cable shielding of this application is effectual to can transmit control signal and electric power simultaneously, in addition, the cable of this application has the protection unit, has further strengthened shielding property, and can effectively realize putting out a fire and cooling, further realize the stability to the field device use of nuclear power plant.
Drawings
FIG. 1 is a schematic cross-sectional view of a cable;
FIG. 2 is a schematic view of the cable, in a first state;
FIG. 3 is an enlarged view A1;
FIG. 4 is an enlarged view of A2;
FIG. 5 is another perspective view of the cable, in a first state;
FIG. 6 is an enlarged view of area B;
FIG. 7 is a schematic view of the cable, in a second state;
FIG. 8 is an enlarged view of area C;
FIG. 9 is a schematic view of a fixed guard unit;
FIG. 10 is an enlarged view of area D;
FIG. 11 is a schematic view of a movable guard unit;
fig. 12 is an enlarged view of the region E.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Reference numerals are as follows: 1 a first enclosure; 1.1 connecting ribs; 1.2 limiting grooves; 2 a first end cartridge; 2.1 a first screw rod; 2.2 a first slide rail; 2.3 a first fixing plate; 3 a second end cartridge; 3.1 a second screw rod; 3.2 a second slide rail; 3.3 second fixing plate; 4 a third fixing plate; 4.1 limiting the slide rail; 5 a second enclosure; 5.1 a first movable block; 5.2 a second movable block; 6 a first pipe portion; 6.1 a first air outlet; 6.2 first air chamber; 6.3 a first air inlet pipe; 6.4 a valve; 7 a second pipe portion; 7.1 a second air outlet; 7.2 a second air chamber; 7.3 a second air inlet pipe; 8, connecting plates; 8.1 a slide seat; 20 a bus cable body; 21 power cable cores; 21.1 a first inner sheath layer; 21.2 flame retardant layer; 21.3 a first insulating layer; 21.4 a first conductor; 22 a signal cable core; 22.1 a second inner sheath layer; 22.2 outer shield layer; 22.3 intermediate shielding layer; 22.4 inner shield layer; 22.5 a second insulating layer; 22.6 a second conductor; 22.7 filling the rope; 23 tensile cords.
The following detailed description is made with reference to the accompanying drawings: a long-life radiation-resistant field bus cable used near a nuclear island reactor core of a nuclear power station sequentially comprises an outer sheath 24.2 and a total inner sheath 24.1 from outside to inside, wherein a tensile rope 23, a signal cable core 22 and a power cable core 21 are arranged in the total inner sheath 24.1, and the power cable core 21 sequentially comprises a first inner sheath 21.1, a flame-retardant layer 21.2, a first insulating layer 21.3 and a first conductor 21.4 from outside to inside; the signal cable core 22 includes second inner sheath 22.1, outer shielding layer 22.2, middle shielding layer 22.3 and inner shielding layer 22.4 from outside to inside in proper order, the inner shielding 22.4 layer has heart yearn and filling rope 22.7, the heart yearn includes second conductor 22.6 and the second insulating layer 22.5 of cladding second conductor 22.6. The filling rope 22.7 is a tubular filling rope; the first inner sheath 21.1, the second inner sheath 22.1 and the total inner sheath 24.1 are all made of polyethylene material; the flame-retardant layer 21.2 is a low-smoke halogen-free flame-retardant layer; the first conductor 21.4 is a copper conductor; the second conductor 22.6 is a silver-plated copper alloy stranded conductor; the outer sheath 24.2 is made of a cross-linked ethylene-tetrafluoroethylene copolymer material. The inner shielding layer 22.4 and the outer shielding layer 22.2 are both tinned copper wire braided shielding layers; the middle shielding layer 22.3 is a polyimide film shielding layer or an aluminum-plastic composite tape shielding layer.
In addition, in order to perform higher-level protection on the bus cable in an important area, the bus cable protection device further comprises a control unit and a protection unit, wherein the protection unit comprises a fixed protection unit and a movable protection unit, the fixed protection unit comprises a plurality of first enclosing cylinders 1, a plurality of connecting ribs 1.1 are connected between every two adjacent first enclosing cylinders 1, one of the two first enclosing cylinders 1 at the two most two ends is connected with a first end cylinder 2, the other one of the two first enclosing cylinders is connected with a second end cylinder 3, a first motor is installed at the first end cylinder 2 and drives a first screw rod 2.1, a second motor is installed at the second end cylinder 3 and drives a second screw rod 3.1; the movable protection unit comprises a first pipe part 6, a second pipe part 7 and a plurality of second enclosing cylinders 5, wherein the first enclosing cylinders 1 and the second enclosing cylinders 5 are circular cylinders, the inner diameter of each second enclosing cylinder 5 is equal to the outer diameter of each first enclosing cylinder 1, the first pipe part 6 is fixedly connected with all the second enclosing cylinders 5, the second pipe part 7 is fixedly connected with all the second enclosing cylinders 5, one end of the first pipe part 6 is closed, the other end of the first pipe part is connected with a first air chamber 6.2, the first air chamber 6.2 is positioned at the first end part cylinder 2 and can slide along the length direction of the first end part cylinder 2, the first air chamber 6.2 is connected with a fire extinguishing gas storage unit through a first air inlet pipe 6.3, and a valve 6.4 is arranged at the first air inlet pipe 6.3; one end of the second pipe part 7 is closed, the other end of the second pipe part 7 is connected with a second air chamber 7.2, a second air inlet pipe 7.3 is arranged at the position of the second air chamber 7.2, a fan is arranged at the position of the second air inlet pipe 7.3, the second air chamber 7.3 is positioned at the position of the second end barrel 3, and the second air chamber 7.2 can slide along the length direction of the second end barrel 3; the number of the second enclosing cylinders 3 is one less than that of the first enclosing cylinders 1, a first movable block 5.1 is fixed at a second enclosing cylinder 5 closest to the first end cylinder 2, a first threaded hole matched with the first screw rod 2.1 is formed in the first movable block 5.1, a second movable block 5.2 is fixed at a second enclosing cylinder 5 closest to the second end cylinder, and a second threaded hole matched with the second screw rod 3.1 is formed in the second movable block 5.2; the part of the first pipe part 6, which is positioned on the second surrounding cylinder 5, is provided with a first air outlet hole 6.1 communicated with the inside of the second surrounding cylinder 5; the part of the second pipe part 7 between the two second enclosing cylinders 5 is provided with a second air outlet 7.1; a temperature sensor is installed at least one first enclosure of the plurality of first enclosures 1, and a smoke sensor is installed at least one first enclosure of the plurality of first enclosures 1.
The first end barrel 2 is connected with a first fixing plate 2.3 through a plurality of first supporting rods; the second end barrel 3 is connected with a second fixing plate 3.3 through a plurality of second support rods; at least one of the other second enclosing cylinders 5 except the two second enclosing cylinders 5 at the end part is connected with a connecting plate 8, a sliding seat 8.1 is fixed at the connecting plate 8, the sliding seat 8.1 can slide along a limiting sliding rail 4.1, and the limiting sliding rail 4.1 is installed at the third fixing plate 4. The first pipe portion 6 and the second pipe portion 7 each have two; the two first pipe portions 6 are located at the same level, the two second pipe portions 7 are located at the same level, and the two first pipe portions 6 are higher than the two second pipe portions 7. The first end barrel 2 is provided with a first slide rail 2.2, and the first air chamber 6.2 is provided with a first slide groove matched with the first slide rail 2.2; the second end barrel 3 is provided with a second slide rail 3.2, and the second air chamber 7.2 is provided with a second slide groove matched with the second slide rail 3.2.
The first end cylinder 2 and the second end cylinder 3 are both circular cylindrical; the lengths of the first enclosing cylinders 1 are the same, the lengths of the second enclosing cylinders 5 are the same, and the lengths of the second enclosing cylinders 5 are greater than that of the first enclosing cylinders 1; fixed protection unit department has a plurality of spacing recesses, the quantity of spacing recess equals the quantity of the splice bar that single first surrounding cylinder one side has and both one-to-one, and every spacing groove connection all first surrounding cylinders 1 and all the splice bar 1.1 that this spacing recess corresponds, the inboard of second surrounding cylinder 5 has spacing protruding muscle, and the quantity of the spacing protruding muscle that every second surrounding cylinder 5 has equals the quantity of spacing recess. The first enclosing barrel 1 and the second enclosing barrel 5 are both provided with tinned copper wire shielding interlayers. The protection unit has a plurality ofly, and a plurality of protection units are arranged in one row.
The cable of this application is shown in the figure, has integrateed signal cable core and power cable core in the cable to integrated tensile rope, thereby can realize the transmission of signal and electric power, and the holistic intensity of cable and shielding property are good, and in addition, the cable of this application has protector (protector's quantity can be further selected according to the region that the cable was located), and the interior local shielding intermediate layer of protection unit, thereby further increase the barrier propterty. In addition, when the temperature at the cable is significantly higher than the first set temperature (specifically, when the measured value of any one or more temperature sensors is determined to be greater than the first set threshold), the movable protection unit may be moved by using the first and second motors, so that in the second state shown in fig. 7, the gap between the two first enclosure cylinders is exposed, and at this time, the blower is turned on to blow air, and the heat dissipation air flow comes out from the second air outlet of the second pipe portion, thereby achieving heat dissipation by blowing the cable. When a fire-retardant requirement exists (specifically, when the measured value of any one or more temperature sensors is greater than a second set threshold value or when any one or more smoke sensors sense smoke), the control cable is in a first state shown in fig. 5, the valve is opened at the moment, and the fire-retardant gas is fed from the first gas outlet hole by using the first pipe part, so that rapid fire extinguishment is realized, and an alarm is given immediately to remind maintenance personnel on site to investigate and maintain in time, so that the risk is reduced.
It is to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.
While the invention has been shown and described with respect to the preferred embodiments, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the scope of the invention as defined in the following claims.
Claims (9)
1. The long-life radiation-resistant field bus cable for the vicinity of a nuclear island reactor core of a nuclear power station is characterized by comprising an outer sheath and a total inner sheath in sequence from outside to inside, wherein a tensile rope, a signal cable core and a power cable core are arranged in the total inner sheath, and the power cable core comprises a first inner sheath, a flame-retardant layer, a first insulating layer and a first conductor in sequence from outside to inside; the signal cable core sequentially comprises a second inner protective layer, an outer shielding layer, a middle shielding layer and an inner shielding layer from outside to inside, the inner shielding layer is provided with a core wire and a filling rope, and the core wire comprises a second conductor and a second insulating layer covering the second conductor; the bus cable further comprises a control unit and a protection unit, wherein the protection unit comprises a fixed protection unit and a movable protection unit, the fixed protection unit comprises a plurality of first enclosing cylinders, a plurality of connecting ribs are connected between every two adjacent first enclosing cylinders, one of the two first enclosing cylinders at the two extreme ends is connected with a first end cylinder, the other one of the two first enclosing cylinders is connected with a second end cylinder, a first motor is installed at the first end cylinder and drives a first screw rod, a second motor is installed at the second end cylinder and drives a second screw rod; the movable protection unit comprises a first pipe part, a second pipe part and a plurality of second enclosing cylinders, the first enclosing cylinders and the second enclosing cylinders are circular cylindrical, the inner diameter of each second enclosing cylinder is equal to the outer diameter of the first enclosing cylinder, the first pipe part is fixedly connected with all the second enclosing cylinders, the second pipe part is fixedly connected with all the second enclosing cylinders, one end of the first pipe part is closed, the other end of the first pipe part is connected with a first air chamber, the first air chamber is located at the first end part cylinder and can slide along the length direction of the first end part cylinder, the first air chamber is connected with a fire extinguishing gas storage unit through a first air inlet pipe, and a valve is arranged at the first air inlet pipe; one end of the second pipe part is closed, the other end of the second pipe part is connected with a second air chamber, a second air inlet pipe is arranged at the second air chamber, a fan is arranged at the second air inlet pipe, the second air chamber is positioned at the second end barrel, and the second air chamber can slide along the length direction of the second end barrel; the number of the second enclosing cylinders is one less than that of the first enclosing cylinders, a first movable block is fixed at the position, closest to the second enclosing cylinder of the first end part cylinder, of the second enclosing cylinder, a first threaded hole matched with the first screw rod is formed in the position of the first movable block, a second movable block is fixed at the position, closest to the second end part cylinder, of the second enclosing cylinder, and a second threaded hole matched with the second screw rod is formed in the position of the second movable block; the part of the first pipe part, which is positioned in the second enclosure cylinder, is provided with a first air outlet hole communicated with the interior of the second enclosure cylinder; the part of the second pipe part between the two second enclosing cylinders is provided with a second air outlet hole; a temperature sensor is installed at least one first enclosure of the first enclosures, and a smoke sensor is installed at least one first enclosure of the first enclosures.
2. The long-life radiation-resistant fieldbus cable for use near the core of a nuclear island of a nuclear power plant as claimed in claim 1, wherein the filler rope is a tubular filler rope; the first inner protective layer, the second inner protective layer and the total inner protective layer are all made of polyethylene materials; the flame-retardant layer is a low-smoke halogen-free flame-retardant layer; the first conductor is a copper conductor; the second conductor is a silver-plated copper alloy stranded conductor; the outer sheath is made of a cross-linked ethylene-tetrafluoroethylene copolymer material.
3. The long-life radiation-resistant fieldbus cable for use near the core of a nuclear island of a nuclear power plant of claim 1, wherein the inner shield layer and the outer shield layer are both tinned copper wire braided shield layers; the middle shielding layer is a polyimide film shielding layer or an aluminum-plastic composite belt shielding layer.
4. The long life radiation tolerant fieldbus cable for use in the vicinity of a nuclear island core of a nuclear power plant of claim 1, wherein the first end barrel is connected to a first fixing plate by a plurality of first support rods; the second end cylinder is connected with a second fixing plate through a plurality of second supporting rods; at least one of the other second enclosing cylinders except the two second enclosing cylinders at the most end part is connected with a connecting plate, a sliding seat is fixed at the connecting plate, the sliding seat can slide along a limiting sliding rail, and the limiting sliding rail is installed at a third fixing plate.
5. The long life radiation tolerant fieldbus cable for use near a nuclear island core of a nuclear power plant of claim 1, wherein the first and second tube portions each have two; two first pipe portions are located same level, and two second pipe portions are located same level, and two first pipe portions are higher than two second pipe portions.
6. The long-life radiation-resistant fieldbus cable for use near a nuclear island core of a nuclear power plant as claimed in claim 1, wherein the first end barrel has a first slide rail thereon, and the first plenum has a first runner thereon for engaging the first slide rail; the second end cylinder is provided with a second sliding rail, and the second air chamber is provided with a second sliding groove matched with the second sliding rail.
7. The long life radiation tolerant fieldbus cable for use proximate to a nuclear island core of a nuclear power plant of claim 1, wherein the first and second end barrels are each cylindrical in a ring; the lengths of the first enclosing cylinders are the same, the lengths of the second enclosing cylinders are the same, and the lengths of the second enclosing cylinders are greater than that of the first enclosing cylinders; the first enclosing cylinder is provided with a limiting groove on the outer side, and the second enclosing cylinder is provided with a limiting convex rib matched with the limiting groove on the inner side.
8. The long life radiation tolerant fieldbus cable for use in the vicinity of a nuclear island core of a nuclear power plant of claim 1, wherein the first and second enclosures each have a tinned copper wire shielding interlayer.
9. The long life radiation tolerant fieldbus cable for use in the vicinity of a nuclear island core of a nuclear power plant of claim 1, wherein the containment unit comprises a plurality of containment units arranged in a row.
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| CN114283990B (en) * | 2021-12-16 | 2023-08-29 | 远东电缆有限公司 | Solid aluminum conductor aluminum pipe sheath automobile high-voltage cable |
| CN114566318B (en) * | 2022-03-17 | 2023-12-08 | 扬州华城电缆有限公司 | Durable power cable for photovoltaic power generation system |
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