60-year life thermoplastic jacketed low smoke zero halogen flame retardant radiation resistant measuring cable for class 1e, category k3, third generation nuclear power plant

Abstract

The application discloses a 1E-class K3-type 60-year life thermoplastic sheath low-smoke halogen-free flame-retardant radiation-resistant measuring cable for third-generation nuclear power plants, and relates to the cable field.The measuring cable comprises a protection assembly arranged at one end of the measuring cable for grounding protection, and the grounding state of the measuring cable can be directly observed.The protection assembly comprises a grounding piece for grounding protection of the measuring cable, and one end of the grounding piece is provided with a detection assembly for detecting the grounding state of the measuring cable.The 1E-class K3-type 60-year life thermoplastic sheath low-smoke halogen-free flame-retardant radiation-resistant measuring cable for third-generation nuclear power plants has the advantages that the grounding piece can make the shielding layer on the measuring cable be well grounded, the generated electromagnetic field can be shielded in the cable, and the surrounding elements can be protected.If the cable is damaged, the leaked current can be connected to the ground net through the grounding piece along the shielding layer, so that the active protection effect is achieved, and the operation safety of the operator is effectively ensured.

Description

Technical Field

[0001] This invention relates to the field of cables, specifically to a Class 1E K3 60-year life thermoplastic sheathed low-smoke halogen-free flame-retardant radiation-resistant measurement cable for third-generation nuclear power plants. Background Technology

[0002] Test cables are cables used to connect test instruments and devices under test (DUTs). They are mainly used to connect radio frequency microwave test instruments to DUT products. Nuclear-grade cables not only possess the general characteristics of ordinary cables, but also exhibit low smoke, halogen-free, and flame-retardant properties, as well as specific environmental resistance (such as radiation resistance and LOCA resistance).

[0003] In some special applications, radio frequency components need to be measured at a fixed frequency, such as measurement cables used in nuclear power plants. In such cases, the phase accuracy of the test system is required to be extremely high. The test cable is the biggest factor affecting the phase in the test system. The change in cable phase is not only caused by the degree of cable bending, but is also closely related to the quality of cable shielding. In the context of nuclear power plant use, the safety of measurement cables must be guaranteed at all times. Therefore, good grounding is particularly necessary. To this end, we propose a 1E-class K3-category 60-year life thermoplastic sheathed low-smoke halogen-free flame-retardant radiation-resistant measurement cable for third-generation nuclear power plants. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a Class 1E K3 thermoplastic sheathed low-smoke halogen-free flame-retardant and radiation-resistant measurement cable with a 60-year lifespan for third-generation nuclear power plants. It has advantages such as high flame retardancy and good grounding, and can effectively solve the problems in the background technology.

[0005] To achieve the above objectives, the technical solution adopted by this invention is: a 60-year lifespan thermoplastic sheathed low-smoke halogen-free flame-retardant radiation-resistant measuring cable of Class 1E K3 for third-generation nuclear power plants, comprising a measuring cable and further comprising... The protective component located at one end of the measuring cable for grounding protection allows for a direct view of the grounding status of the measuring cable; The protective component includes a grounding element for measuring cable grounding protection, and one end of the grounding element is provided with a detection component for detecting the grounding status of the measuring cable.

[0006] Preferably, the measuring cable comprises three cores, and the outer walls of each of the three cores are provided with an inner protective layer for their insulation protection.

[0007] Preferably, the outer walls of the three inner protective layers are provided with a high-strength, compressive-resistant filling layer, and the outer walls of the filling layers are provided with a shielding layer for electromagnetic shielding, and the outer walls of the shielding layers are provided with a high-strength, wear-resistant outer protective layer.

[0008] Preferably, the detection component includes its main detection element, and the lower end of the detection element is provided with a connector for securely connecting to the measuring cable.

[0009] Preferably, the detection component includes its main mounting sleeve and several wires, and one side of the mounting sleeve is provided with a light-emitting diode for visually knowing the grounding connection status of the measuring cable, the other side of the mounting sleeve is provided with a power supply for powering the light-emitting diode, and the negative terminal of the light-emitting diode is provided with a plug for connecting to the grounding component.

[0010] Preferably, the connector includes two fixed outer rings for clamping onto the outer wall of the shielding layer, and the inner walls of the two fixed outer rings are provided with multiple copper contacts. One end of the two fixed outer rings is rotatably connected, and the end of the two fixed outer rings away from their joint is provided with a fastening screw for fastening.

[0011] Preferably, the grounding component includes a main grounding wire, and both ends of the grounding wire are provided with fixing ears for connection and fixation, and a copper sleeve is provided between the two fixing ears and the grounding wire.

[0012] Preferably, one of the fixing ears is connected to an external grounding post, and the other fixing ear is connected to a fastening screw, and the plug is inserted into the inner wall of the fixing ear that is connected to the fastening screw.

[0013] Compared with existing technologies, this invention provides a Class 1E K3 category 60-year life thermoplastic sheathed low-smoke halogen-free flame-retardant radiation-resistant measurement cable for third-generation nuclear power plants, which has the following advantages: 1. The third-generation nuclear power plant uses Class 1E K3 thermoplastic sheathed low-smoke halogen-free flame-retardant radiation-resistant measurement cables with a lifespan of 60 years. The entire cable body is made of low-smoke halogen-free materials to maximize its suitability for nuclear use scenarios.

[0014] 2. The third-generation nuclear power plant uses Class 1E K3 category thermoplastic sheathed low smoke halogen-free flame retardant radiation-resistant measurement cable with a 60-year lifespan. Its body and shielding layer are covered with braided copper mesh. Due to its structure, it can play a good electromagnetic radiation shielding role, thereby indirectly ensuring the data fidelity of the measurement cable during use. In addition, the external protective components of the shielding layer can be well grounded, thereby greatly reducing the risk of leakage due to damage to the measurement cable.

[0015] 3. The third-generation nuclear power plant uses Class 1E K3 thermoplastic sheathed low-smoke halogen-free flame-retardant radiation-resistant measuring cables with a 60-year lifespan. Through the setting of protective components, the structure of the detection device is simple and the cost is low. Users can use LEDs to know in time whether the grounding of the measuring cable is good or bad, so as to quickly diagnose and maintain the grounding status of the measuring cable.

[0016] 4. This third-generation nuclear power plant uses Class 1E K3 thermoplastic sheathed low-smoke halogen-free flame-retardant radiation-resistant measurement cables with a 60-year lifespan. Through the installation of protective components and grounding devices, the shielding layer on the measurement cable is well grounded, which can shield the generated electromagnetic field in the cable to protect the surrounding components. In addition, if the cable is damaged, the leaked current will be connected to the grounding grid through the grounding device along the shielding layer, so as to play a positive protective role and effectively ensure the safety of operators. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the third-generation nuclear power plant 1E-class K3-category 60-year life thermoplastic sheathed low-smoke halogen-free flame-retardant radiation-resistant measurement cable of the present invention.

[0018] Figure 2 This is a structural cross-sectional diagram of the third-generation nuclear power plant 1E-class K3 category 60-year life thermoplastic sheathed low smoke halogen-free flame retardant radiation-resistant measurement cable of the present invention.

[0019] Figure 3 This is a schematic diagram of the assembly of the protective component for the 1E-class K3-class 60-year life thermoplastic sheathed low-smoke halogen-free flame-retardant radiation-resistant measurement cable for third-generation nuclear power plants.

[0020] Figure 4 This is a schematic diagram of the structure of the protective assembly for the 1E-class K3-type 60-year life thermoplastic sheathed low-smoke halogen-free flame-retardant radiation-resistant measurement cable used in third-generation nuclear power plants.

[0021] Figure 5 This is a schematic diagram of the detection component in the protective assembly for the third-generation nuclear power plant 1E-class K3-class 60-year life thermoplastic sheathed low-smoke halogen-free flame-retardant radiation-resistant measurement cable of the present invention.

[0022] Figure 6 This is a schematic diagram of the circuit connection of the testing component in the testing assembly for the third-generation nuclear power plant 1E-class K3-class 60-year life thermoplastic sheathed low-smoke halogen-free flame-retardant radiation-resistant measuring cable of the present invention.

[0023] Figure 7 This is a schematic diagram of the grounding component in the protective assembly for the 1E-class K3-type 60-year life thermoplastic sheathed low-smoke halogen-free flame-retardant radiation-resistant measurement cable for third-generation nuclear power plants.

[0024] In the picture: 1. Measuring cable; 2. Protective components; 11. Cable core; 12. Inner protective layer; 13. Filling layer; 14. Shielding layer; 15. Outer protective layer; 21. Detection components; 22. Grounding components; 211. Inspection component; 212. Connecting component; 2111, Mounting sleeve; 2112, Light-emitting diode; 2113, Power supply; 2114, Wire; 2115, Plug; 2121. Fixed outer ring; 2122. Copper contact; 2123. Fastening screw; 221. Grounding wire; 222. Copper sleeve; 223. Fixing lug. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0027] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0028] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0029] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0030] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Specific Implementation Example 1

[0031] To address the shortcomings of existing technologies, such as Figure 1 , 3 As shown, the present invention provides a Class 1E K3 type 60-year life thermoplastic sheathed low smoke halogen-free flame retardant radiation-resistant measurement cable for third-generation nuclear power plants, wherein the protective component 2 is detachably connected to the outer wall of one end of the measurement cable 1.

[0032] It should be noted that during the use of measuring cable 1, the operator first removes the outer protective layer 15 from the outer wall of one end of measuring cable 1, exposing the shielding layer 14. Then, the protective component 2 is installed on the outer wall of one end of measuring cable 1 based on the shielding layer 14, and the protective component 2 is grounded.

[0033] Specifically, such as Figure 1 As shown, the third-generation nuclear power plant uses a Class 1E K3 60-year life thermoplastic sheathed low-smoke halogen-free flame-retardant radiation-resistant measuring cable. Its body has three inner protective layers 12 covering the outer walls of three cable cores 11 respectively, and a filling layer 13 filling between the three inner protective layers 12 and the shielding layer 14. The shielding layer 14 covers the outer wall of the filling layer 13, and the outer protective layer 15 covers the outer wall of the shielding layer 14.

[0034] It should be noted that the present invention is a 1E-class K3-category 60-year life thermoplastic sheath low smoke halogen-free flame retardant radiation-resistant measuring cable for third-generation nuclear power plants. Its body, the inner protective layer 12 is used for insulation protection of the cable core 11. Its material is polyvinyl chloride, which has good insulation and high flame retardancy. Therefore, the service life of the measuring cable 1 can be further improved. The filling layer 13 is filled with polyester ribbon, which has high mechanical strength and excellent insulation properties, and is resistant to high and low temperatures; The outer protective layer 15 is made of thermoplastic polyurethane, which is more than five times more wear-resistant than natural rubber, and can further improve the service strength of the measuring cable 1. The shielding layer 14 is covered with a braided copper mesh, which, due to its structure, can achieve a good electromagnetic shielding effect, thereby indirectly ensuring the data fidelity of the measuring cable 1 during use. In addition, the external protective component 2 of the shielding layer 14 can be well grounded, thereby greatly reducing the risk of leakage due to damage to the measuring cable 1.

[0035] Specifically, and such as Figure 4 As shown, the protective component 2 for the 1E-class K3-category 60-year life thermoplastic sheathed low-smoke halogen-free flame-retardant radiation-resistant measurement cable used in third-generation nuclear power plants has a detection component 21 that is detachably connected to one end of the grounding component 22, and the end of the grounding component 22 away from the detection component 21 is connected to an external grounding stake.

[0036] Furthermore, such as Figure 5 , 6 As shown, the detection component 211 in the protective assembly 2 for the 60-year life thermoplastic sheathed low smoke halogen-free flame retardant radiation-resistant measurement cable of Class 1E K3 for third-generation nuclear power plants has a partially fixed outer ring 2121 connected to the lower end of the main body of the detection assembly 21. The power supply 2113 is fixedly connected to one side of the mounting sleeve 2111, and the light-emitting diode 2112 is fixedly connected to the other side of the mounting sleeve 2111. The positive terminal of the light-emitting diode 2112 is connected to the negative terminal of the power supply 2113 through the corresponding wire 2114, and the positive terminal of the power supply 2113 is connected to the fixed outer ring 2121 through the corresponding wire 2114. The negative terminal of the light-emitting diode 2112 is fixedly connected to the plug 2115 through the corresponding wire 2114, and the plug 2115 is plugged into one end of the grounding member 22.

[0037] It should be noted that the present invention is a 1E-class K3-category 60-year life thermoplastic sheathed low smoke halogen-free flame retardant radiation-resistant measuring cable for third-generation nuclear power plants. Through the set detection element 211, during the use of the measuring cable 1, the negative terminal of the power supply 2113 is normally connected to the positive terminal of the light-emitting diode 2112 through the corresponding wire 2114, and the positive terminal of the power supply 2113 is connected to the fixed outer ring 2121 through the corresponding wire. At the same time, the negative terminal of the light-emitting diode 2112 is connected to the corresponding plug 2115 and its copper sleeve 222 through the plug 2115, thereby forming a normal circuit, causing the light-emitting diode 2112 to light up normally. If the grounding component 22 and the detection component 21 have poor contact, such as the connection between the fixing ear 223 and the fastening screw 2123 is not tight enough, resulting in the fixing ear 223 and the fixing outer ring 2121 being grounded in an unsatisfactory manner, there will be an open circuit in the circuit, and the light-emitting diode 2112 will be turned off.

[0038] Among them, the detection component 211 has a simple structure and low cost. Users can use the light-emitting diode 2112 to know in a timely manner whether the grounding of the measuring cable 1 is good or bad, so as to quickly diagnose and maintain the grounding status of the measuring cable 1.

[0039] Furthermore, and such Figure 5 , 6 As shown, in the protective assembly 2 for the 1E-class K3-class 60-year life thermoplastic sheathed low-smoke halogen-free flame-retardant radiation-resistant measurement cable used in third-generation nuclear power plants, the connector 212 has two fixed outer rings 2121 connected at one end, which are rotatably connected to each other. The two fixed outer rings 2121 are also snapped into one side of the lower end of the mounting sleeve 2111. The two fixed outer rings 2121 are fixedly connected away from their connection point by fastening screws 2123. One end of the grounding component 22 is fixedly connected to the fastening screws 2123. Multiple copper contacts 2122 are tightly attached to the outer wall of the shielding layer 14.

[0040] It should be noted that the present invention is a 1E-class K3-class thermoplastic sheathed low smoke halogen-free flame retardant radiation-resistant measurement cable with a 60-year lifespan for third-generation nuclear power plants. Through the set connector 212, during the assembly of the protective component 2, the user peels off the outer protective layer 15 on the measurement cable 1 and then puts the entire protective component 2 on the outer wall of the shielding layer 14 at one end of the measurement cable 1 based on the mounting sleeve 2111. At the same time, the user rotates and tightens the fastening screw 2123, so that the two fixing outer rings 2121 are clamped relative to each other on the outer wall of the measuring cable 1 and the shielding layer 14, so that the multiple copper contacts 2122 are tightly attached to the shielding layer 14.

[0041] The multiple copper contacts 2122 are used to increase the fit between the two fixed outer rings 2121 and the shielding layer 14, so as to ensure the excellent connection between the two fixed outer rings 2121 and the shielding layer 14, and thereby indirectly ensure the installation stability of the two fixed outer rings 2121.

[0042] Furthermore, and such Figure 7 As shown, in the protective assembly 2 for the 1E-class K3-type 60-year life thermoplastic sheathed low-smoke halogen-free flame-retardant radiation-resistant measurement cable used in third-generation nuclear power plants, the grounding component 22 has two copper sleeves 222 respectively connected to the two ends of the grounding wire 221, and two fixing ears 223 are opened from the opposite ends of the two copper sleeves 222.

[0043] It should be noted that the present invention relates to the grounding component 22 in the protective assembly 2 for the 1E-class K3-category 60-year life thermoplastic sheathed low smoke halogen-free flame retardant radiation-resistant measuring cable of the third-generation nuclear power plant. During the assembly of the measuring cable 1, the user first installs the protective assembly 2 on the outer wall of one end of the measuring cable 1 based on the detection assembly 21, and at the same time connects one end of the grounding wire 221 to the fastening screw 2123 based on the corresponding copper sleeve 222 and fixes it. Then, the other end of the grounding wire 221 is connected to the grounding stake based on the corresponding fixing lug 223. The grounding component 22 ensures that the shielding layer 14 on the measuring cable 1 is properly grounded, which can shield the generated electromagnetic field in the cable to protect the surrounding components. In addition, if the cable is damaged, the leaked current will be connected to the ground grid through the grounding component 22 along the shielding layer 14, so as to play a positive protective role and effectively ensure the operation safety of the operator.

[0044] In summary, the basic working principle of this invention is as follows: During the use of the measuring cable 1, the negative terminal of the power supply 2113 is normally connected to the positive terminal of the light-emitting diode 2112 through the corresponding wire 2114, and the positive terminal of the power supply 2113 is connected to the fixed outer ring 2121 through the corresponding wire; at the same time, the negative terminal of the light-emitting diode 2112 is connected to a copper sleeve 222 through the plug 2115, thereby forming a normal circuit, causing the light-emitting diode 2112 to light up normally; if the grounding component 22 and the detection component 21 have poor contact, such as the connection between the fixing ear 223 and the fastening screw 2123 is not tight enough, resulting in the grounding of the fixing ear 223 and the fixed outer ring 2121 not being ideal, then there is an open circuit in the circuit, and the light-emitting diode 2112 goes out; when the... During the assembly of the protective component 2, the user removes the outer protective layer 15 from the measuring cable 1, and then attaches the entire protective component 2 to the outer wall of the shielding layer 14 at one end of the measuring cable 1 using the mounting sleeve 2111. At the same time, the user rotates and tightens the fastening screw 2123, so that the two fixing outer rings 2121 are clamped against the outer wall of the shielding layer 14 of the measuring cable 1, and the multiple copper contacts 2122 are tightly attached to the shielding layer 14. During the assembly of the measuring cable 1, the user first installs the protective component 2 based on the detection component 21 on the outer wall of one end of the measuring cable 1, and then connects one end of the grounding wire 221 to the fastening screw 2123 based on the corresponding copper sleeve 222 and fixes it. Then, the other end of the grounding wire 221 is connected to the grounding stake based on the corresponding fixing lug 223.

[0045] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A Class 1E K3 thermoplastic sheathed low-smoke halogen-free flame-retardant radiation-resistant measuring cable for third-generation nuclear power plants with a lifespan of 60 years, comprising a measuring cable (1), characterized in that: It also includes a protective component (2) located at one end of the measuring cable (1) for grounding protection, which can intuitively know the grounding status of the measuring cable (1); the protective component (2) includes a grounding component (22) for grounding protection of the measuring cable (1), and one end of the grounding component (22) is provided with a detection component (21) for detecting the grounding status of the measuring cable (1). The measuring cable (1) includes three cable cores (11), and the outer walls of the three cable cores (11) are provided with an inner protective layer (12) for their insulation protection. The outer walls of the three inner protective layers (12) are provided with a high-strength compressive-resistant filling layer (13), and the outer walls of the filling layer (13) are provided with a shielding layer (14) for electromagnetic shielding, and the outer walls of the shielding layer (14) are provided with a high-strength wear-resistant outer protective layer (15). The detection component (21) includes its main detection component (211), and the lower end of the detection component (211) is provided with a connector (212) for secure connection with the measuring cable (1). The detection component (211) includes its main mounting sleeve (2111) and several wires (2114). One side of the mounting sleeve (2111) is provided with a light-emitting diode (2112) for visually knowing the grounding connection status of the measuring cable (1). The other side of the mounting sleeve (2111) is provided with a power supply (2113) for powering the light-emitting diode (2112). The negative terminal of the light-emitting diode (2112) is provided with a plug (2115) for connecting to the grounding component (22). The connector (212) includes two fixed outer rings (2121) for clamping on the outer wall of the shielding layer (14), and the inner walls of the two fixed outer rings (2121) are provided with multiple copper contacts (2122). One end of the two fixed outer rings (2121) is rotatably connected, and the end of the two fixed outer rings (2121) away from their joint is provided with a fastening screw (2123) for fastening. The grounding component (22) includes its main grounding wire (221), and both ends of the grounding wire (221) are provided with fixing ears (223) for connection and fixation. A copper sleeve (222) is provided between the two fixing ears (223) and the grounding wire (221). One of the fixing ears (223) is connected to an external grounding post, and the other fixing ear is connected to a fastening screw (2123). The plug (2115) is inserted into the inner wall of the fixing ear (223) connected to the fastening screw (2123).

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