Nuclear power plant broadcast system

Abstract

The utility model discloses a nuclear power plant broadcast system, it includes broadcast backbone cable, first power amplifier, second power amplifier, first communication machine room, second communication machine room and a plurality of broadcast loudspeaker. Nuclear power plant broadcast system through being used as main line to four core lines, and adopting the double power amplifier of different machine room of division to drive 50% broadcast loudspeaker respectively, forms the redundancy structure of double circuit and double drive: when single power amplifier failure or any two core lines disconnect, only influence 50% broadcast loudspeaker, and the remaining 50% broadcast loudspeaker still can work normally, greatly reduce the influence of single point failure to the system, significantly improve the reliability of broadcast system, ensure that nuclear power plant still can maintain partial broadcast function when equipment failure, guarantee the transmission of emergency command.

Description

Technical Field

[0001] This utility model relates to the nuclear energy industry, and in particular to a broadcasting system for nuclear power plants. Background Technology

[0002] To ensure the safe and stable operation of nuclear power plants, a wired broadcasting system must be installed within the plant. During normal operation, this system is used by the main control room to call on-site operators and issue general notices. In the event of an accident, it is used to issue emergency calls and record alarm signals. It is a key subsystem of the nuclear power plant's emergency communication system.

[0003] The existing wired public address system in nuclear power plants consists of a main broadcasting unit, a control console, and loudspeakers installed in the nuclear island, conventional island, and auxiliary buildings. Each building is connected to a single four-core main broadcasting cable. One end of the cable connects to the broadcasting system's power amplifier, and the other end connects to the broadcasting terminal box inside the building. Of the four cores, only two are primary, and the other two are spares. All loudspeakers inside the building are connected to the two-core primary cable. This system presents a significant single point of failure: if the connected power amplifier malfunctions, or if any one of the two cores of the primary cable breaks, the broadcasting system in that building will become completely unusable. This directly leads to the failure of the emergency broadcasting function, making it impossible to transmit critical instructions in a timely manner during an accident, posing a serious threat to the safe operation of the nuclear power plant and personnel evacuation. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a broadcasting system for nuclear power plants.

[0005] The technical solution adopted by this utility model to solve its technical problem is: to construct a nuclear power plant broadcasting system, which includes a broadcasting backbone cable, a first power amplifier, a second power amplifier, a first communication equipment room, a second communication equipment room, and multiple broadcasting loudspeakers; The main broadcast cable has a four-core structure, and all four cores are configured as main cables. The first power amplifier is located inside the first communication equipment room, and the second power amplifier is located inside the second communication equipment room; The first power amplifier establishes an electrical connection with two of the core wires of the broadcast trunk cable, and the second power amplifier establishes an electrical connection with the other two core wires of the broadcast trunk cable; The multiple loudspeakers are electrically connected to the four core wires of the main broadcast cable. The number of loudspeakers connected to two core wires of the main broadcast cable accounts for 50% of the total number of loudspeakers, and the number of loudspeakers connected to the other two core wires of the main broadcast cable accounts for 50% of the total number of loudspeakers.

[0006] In some embodiments, when multiple loudspeakers are arranged on one side of a nuclear power plant building, the odd-numbered loudspeakers are electrically connected to two of the core wires of the main broadcast cable, and the even-numbered loudspeakers are electrically connected to the other two core wires of the main broadcast cable.

[0007] In some embodiments, when the plurality of the loudspeakers are arranged on both sides inside the nuclear power plant building, the loudspeakers on one side of the nuclear power plant building are electrically connected to two cores of the main broadcast cable, and the loudspeakers on the other side of the nuclear power plant building are electrically connected to the other two cores of the main broadcast cable.

[0008] In some embodiments, the nuclear power plant broadcasting system further includes a broadcast terminal box located inside the nuclear power plant building.

[0009] In some embodiments, the number of loudspeakers in the building is configured to be approximately 120% of the standard design number.

[0010] In some embodiments, the nuclear power plant broadcasting system further includes a broadcast host, which is communicatively connected to a first power amplifier and a second power amplifier, and is used to send broadcast control commands to the first power amplifier and the second power amplifier to control the output of broadcast content.

[0011] In some embodiments, the outer layer of the broadcast trunk cable is provided with a shielding layer.

[0012] In some embodiments, cable fixing brackets are provided along the laying path of the broadcast trunk cable.

[0013] The implementation of this utility model has the following beneficial effects: By setting all four core wires as the main lines and using dual power amplifiers in different equipment rooms to drive 50% of the broadcast speakers, a redundant structure of dual circuits and dual drives is formed in the nuclear power plant broadcast system. When a single power amplifier fails or any two core wires are disconnected, only 50% of the broadcast speakers are affected, and the remaining 50% of the broadcast speakers can still work normally. This greatly reduces the impact of single-point failures on the system, significantly improves the reliability of the broadcast system, and ensures that the nuclear power plant can still maintain some broadcast functions when equipment fails, thus ensuring the transmission of emergency instructions. Attached Figure Description

[0014] To more clearly illustrate the technical solution of this utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only show some embodiments of this utility model and should not be considered as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the first embodiment of the nuclear power plant broadcasting system in some embodiments of this utility model; Figure 2 This is a schematic diagram of the overall structure of a second embodiment of the nuclear power plant broadcasting system in some embodiments of this utility model. Detailed Implementation

[0015] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientations or positional relationships indicated by terms such as "front," "rear," "upper," "lower," "left," "right," "longitudinal," "horizontal," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," and "tail" are based on the orientations or positional relationships shown in the accompanying drawings, and are constructed and operated in a specific orientation. They are only for the convenience of describing this technical solution and do not indicate that the device or component referred to must have a specific orientation; therefore, they should not be construed as limitations on this utility model.

[0016] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. When an component is referred to as being "on" or "below" another component, the component can be located "directly" or "indirectly" on the other component, or there may be one or more intermediary components. The terms "first," "second," "third," etc., are only for the convenience of describing this technical solution and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," "third," etc., may explicitly or implicitly include one or more of that feature. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0017] Please see Figure 1 and Figure 2This invention relates to a nuclear power plant broadcasting system, as described in some embodiments of the present invention. The system includes a main broadcast cable 1, a first power amplifier 2, a second power amplifier 3, a first communication room 4, a second communication room 5, and multiple loudspeakers 6. The main broadcast cable 1 has a four-core structure, with all four cores configured as main lines. The first power amplifier 2 is located inside the first communication room 4, and the second power amplifier 3 is located inside the second communication room 5. The first power amplifier 2 is electrically connected to two cores of the main broadcast cable 1, and the second power amplifier 3 is electrically connected to the other two cores of the main broadcast cable 1. The multiple loudspeakers 6 are electrically connected to the four cores of the main broadcast cable 1, with 50% of the loudspeakers 6 connected to two cores and 50% connected to the other two cores.

[0018] Specifically, the main broadcast cable 1 has a four-core structure, with all four cores configured as primary wires, abandoning the existing design of two primary cores and two spare cores to maximize the cable's transmission capacity. The first power amplifier 2 is located inside the first communication equipment room 4, and the second power amplifier 3 is located inside the second communication equipment room 5, achieving physical isolation between the power amplifiers through separate equipment rooms. The first power amplifier 2 is electrically connected to two cores of the main broadcast cable 1, and the second power amplifier 3 is electrically connected to the other two cores of the main broadcast cable 1, forming a transmission loop driven independently by the dual power amplifiers. Multiple loudspeakers 6 are electrically connected to the four cores of the main broadcast cable 1, with 50% of the loudspeakers 6 connected to two cores and 50% connected to the other two cores, achieving balanced group driving of the loudspeakers 6. The nuclear power plant's broadcasting system uses four core wires as the main lines and employs dual power amplifiers in different equipment rooms to drive 50% of the broadcasting speakers 6, forming a redundant structure with dual circuits and dual drives. When a single power amplifier fails or any two core wires break, only 50% of the broadcasting speakers 6 are affected, while the remaining 50% of the broadcasting speakers 6 can still operate normally. This significantly reduces the impact of single-point failures on the system, greatly improves the reliability of the broadcasting system, and ensures that the nuclear power plant can still maintain some broadcasting functions and guarantee the transmission of emergency instructions when equipment fails.

[0019] To better ensure effective coverage of the building's broadcast signal in the event of a single point of failure, the number of loudspeakers 6 in the building is configured to be approximately 120% of the standard design quantity.

[0020] like Figure 1As shown, in some embodiments, when multiple loudspeakers 6 are arranged on one side within a nuclear power plant building, the odd-numbered loudspeakers 6 are electrically connected to two core wires of the main broadcast cable 1, and the even-numbered loudspeakers 6 are electrically connected to the other two core wires of the main broadcast cable 1. For scenarios requiring only one-sided loudspeaker placement, such as narrow corridors or equipment passages within a nuclear power plant, the grouping and connection of odd and even-numbered loudspeakers achieves balanced matching between the loudspeakers and the dual power amplifier circuit. This design eliminates the need for additional loudspeaker installation space, adapting to single-sided placement scenarios. While ensuring system reliability, it improves the system's adaptability to different building spaces, avoiding deployment difficulties caused by space limitations.

[0021] In a specific embodiment, multiple loudspeakers 6 are evenly arranged along the length of one side of the nuclear power plant building. The odd-numbered loudspeakers (numbered 1, 3, 5, 7, 9...) are connected via wiring to the two core wires of the main broadcast cable 1 corresponding to the first power amplifier 2; the even-numbered loudspeakers (numbered 2, 4, 6, 8, 10...) are connected via wiring to the two core wires of the main broadcast cable 1 corresponding to the second power amplifier 3. When the first power amplifier 2 fails, the odd-numbered loudspeakers (numbered 1, 3, 5, 7, 9...) stop working, while the even-numbered loudspeakers (numbered 2, 4, 6, 8, 10...) can still receive signals from the second power amplifier 3 normally. Staff can control the second power amplifier 3 to broadcast via a control console.

[0022] like Figure 2 As shown, in some embodiments, when multiple loudspeakers 6 are arranged on both sides of a nuclear power plant building, the loudspeaker 6 on one side of the building is electrically connected to two core wires of the main broadcast cable 1, and the loudspeaker 6 on the other side is electrically connected to the other two core wires of the main broadcast cable 1. For scenarios requiring loudspeakers on both sides, such as wide corridors and halls within a nuclear power plant, the two-sided group connection method ensures that each loudspeaker corresponds to a dual-amplifier circuit. This design not only improves reliability through dual-circuit redundancy but also ensures balanced sound coverage on both sides of the building, avoiding the problem of no broadcast signal on one side due to a single loudspeaker failure, further optimizing the sound coverage effect of the broadcast system, and ensuring that all personnel in all areas of the building can receive broadcast information.

[0023] In a specific embodiment, multiple loudspeakers 6 are arranged along the length of each side of the nuclear power plant building, symmetrical about the centerline of the building. The loudspeakers on one side of the building are connected via wiring to two core wires of the main broadcast cable 1 corresponding to the first power amplifier 2. The loudspeakers on the other side of the building are connected via wiring to the other two core wires of the main broadcast cable 1 corresponding to the second power amplifier 3. When the two core wires of the main broadcast cable 1 connected to the first power amplifier 2 are disconnected, the loudspeakers on that side stop working, while the loudspeakers on the other side continue to operate normally. Personnel can control the second power amplifier 3 via a control console to broadcast to the loudspeakers on that side, ensuring that personnel in the corresponding area can receive emergency instructions.

[0024] The nuclear power plant's broadcasting system also includes a broadcasting terminal box 7, which is located inside the nuclear power plant building. By installing the broadcasting terminal box 7, the connections between the main broadcasting cable 1 and the broadcasting speakers 6 are converged and transferred, making the wiring layout more organized. During later maintenance, staff can quickly locate the wiring connections through the terminal box, reducing the time spent on wiring inspection and troubleshooting.

[0025] The nuclear power plant's broadcasting system also includes a broadcast host, which is communicatively connected to the first power amplifier 2 and the second power amplifier 3. The broadcast host sends broadcast control commands to the first power amplifier 2 and the second power amplifier 3 to control the output of broadcast content. By setting up the broadcast host, centralized control of the first and second power amplifiers 3 is achieved. Operators can quickly send broadcast control commands from key locations such as the main control room and emergency command center via the control console, eliminating the need to switch operations between different equipment rooms. This shortens the time for broadcast initiation and content switching, and improves the system's emergency response efficiency.

[0026] The outer layer of the main broadcast cable 1 is equipped with a shielding layer, which can effectively block strong electromagnetic interference, reduce the impact of interference on audio signal transmission, ensure clear broadcast signals without noise, and guarantee the accurate transmission of broadcast information.

[0027] Cable fixing brackets are installed along the laying path of the main broadcast cable 1. By installing cable fixing brackets, the main cable is fixed on the predetermined path, preventing the cable from loosening or shaking, and reducing the risk of poor line contact.

[0028] Compared with existing nuclear power plant broadcasting systems, this utility model has the following advantages: Higher reliability: By using dual power amplifiers in separate equipment rooms, using four-core cables as the primary cables, and connecting 50% of the speakers in groups, the impact of single-point failures is greatly reduced, and 50% of the broadcast function can still be maintained in the event of a failure. Enhanced adaptability: Adaptable to different spatial scenarios within nuclear power plants based on two speaker arrangement schemes, one for one side and one for both sides.

[0029] It is understood that the above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present utility model patent. It should be noted that for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present utility model, all of which fall within the protection scope of the present utility model. Therefore, all equivalent transformations and modifications made within the scope of the claims of the present utility model should fall within the coverage of the claims of the present utility model.

Claims

1. A nuclear power plant broadcast system, characterized by, Includes a main broadcast cable (1), a first power amplifier (2), a second power amplifier (3), a first communication equipment room (4), a second communication equipment room (5), and multiple broadcast loudspeakers (6); The main broadcast cable (1) has a four-core structure, and all four cores are configured as main lines; The first power amplifier (2) is located inside the first communication equipment room (4), and the second power amplifier (3) is located inside the second communication equipment room (5); The first power amplifier (2) establishes an electrical connection with two of the core wires of the broadcast trunk cable (1), and the second power amplifier (3) establishes an electrical connection with the other two core wires of the broadcast trunk cable (1). Multiple loudspeakers (6) are electrically connected to the four core wires of the main broadcast cable (1). The number of loudspeakers (6) connected to two core wires of the main broadcast cable (1) accounts for 50% of the total number of loudspeakers (6), and the number of loudspeakers (6) connected to the other two core wires of the main broadcast cable (1) accounts for 50% of the total number of loudspeakers (6).

2. The nuclear power plant broadcast system in accordance with claim 1, wherein, When multiple loudspeakers (6) are arranged on one side of the nuclear power plant building, the odd-numbered loudspeakers (6) are electrically connected to two of the core wires of the main broadcast cable (1), and the even-numbered loudspeakers (6) are electrically connected to the other two core wires of the main broadcast cable (1).

3. The nuclear power plant broadcast system in accordance with claim 1, wherein, When multiple loudspeakers (6) are arranged on both sides inside the nuclear power plant building, the loudspeaker (6) on one side of the nuclear power plant building establishes an electrical connection with two of the core wires of the main broadcast cable (1), and the loudspeaker (6) on the other side of the nuclear power plant building establishes an electrical connection with the other two core wires of the main broadcast cable (1).

4. The nuclear power plant broadcast system in accordance with claim 1, wherein, The nuclear power plant broadcasting system also includes a broadcasting terminal box (7), which is located inside the nuclear power plant building.

5. The nuclear power plant broadcast system in accordance with claim 1, wherein, The number of loudspeakers (6) in the building is configured to be approximately 120% of the standard design quantity.

6. The nuclear power plant broadcast system in accordance with claim 1, wherein, The nuclear power plant broadcasting system also includes a broadcast host, which is communicatively connected to the first power amplifier (2) and the second power amplifier (3) to send broadcast control commands to the first power amplifier (2) and the second power amplifier (3) to control the output of broadcast content.

7. The nuclear power plant broadcast system in accordance with claim 1, wherein, The outer layer of the broadcast trunk cable (1) is provided with a shielding layer.

8. The nuclear power plant broadcast system in accordance with claim 1, wherein, The main broadcast cable (1) is provided with cable fixing brackets along its laying path.

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