Fire alarm system control box of nuclear power plant and fire alarm system

Abstract

The invention provides a fire alarm system control box of a nuclear power plant and a fire alarm system. The fire alarm system control box comprises a box body fixed on a wall body; the shielding layer is fixed on the inner wall of the box body; the output module is fixed in the box body; the output module is electrically connected with the signal input line and the signal output line to form an alarm loop. The output module receives fire alarm signals through the alarm loop. The output module is electrically connected with the power input line and the power output line to form a power supply loop which is used for supplying power to the output module. The output module is further electrically connected with the alarm circuit and the audible and visual alarm to form a control loop, and the output module controls the audible and visual alarm to give an alarm through the control loop when receiving the fire alarm signal. According to the fire alarm system control box of the nuclear power plant and the fire alarm system, the radiation shielding effect of the control box can be improved.

Description

Technical Field

[0001] The invention relates to the field of nuclear power, and in particular to a fire alarm system control box and a fire alarm system of a nuclear power plant. Background Art

[0002] In nuclear power plants, ensuring the reliability and durability of fire alarm systems is critical, especially in the high radiation environment of nuclear island buildings. The core function of the automatic fire alarm system is to detect and alarm fires in a timely manner to protect the safety of personnel and equipment. Among them, the control box of the fire alarm system plays a key role in the system, responsible for signal transmission between the controller and the controlled equipment and controlled components it is connected to.

[0003] The fire sound and light alarms in the automatic fire alarm system are generally divided into coded and non-coded types. The non-coded fire sound and light alarms need to be connected to the automatic fire alarm system loop through the output module to achieve the wide dissemination of the alarm signal and timely response. However, in the high-radiation areas of nuclear power plants, electronic equipment is exposed to the radiation environment for a long time, which will cause its performance to degrade or fail. Therefore, the control boxes installed in these areas must have good radiation resistance to ensure the stable operation of the automatic fire alarm system.

[0004] In view of the stringent requirements of the high radiation environment of nuclear power plants on electronic equipment, in order to improve the effect of shielding radiation, the overall weight of the traditionally designed control box is relatively large, making installation and maintenance difficult, increasing the complexity of the project and the intensity of work. Therefore, there is room for improvement. Summary of the invention

[0005] The object of the present invention is to provide a fire alarm system control box and a fire alarm system of a nuclear power plant, which can improve the radiation shielding effect of the control box.

[0006] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0007] The present invention provides a fire alarm system control box for a nuclear power plant, comprising:

[0008] The box is fixed on the wall;

[0009] A shielding layer is fixed on the inner wall of the box; and

[0010] An output module is fixed in the box;

[0011] The output module is electrically connected to the signal input line and the signal output line to form an alarm circuit, and the output module receives the fire alarm signal through the alarm circuit;

[0012] The output module is also electrically connected to the power input line and the power output line to form a power supply circuit, and the power supply circuit is used to supply power to the output module;

[0013] The output module is also electrically connected to the sound and light alarm through an alarm circuit to form a control loop. When the output module receives the fire alarm signal, it controls the sound and light alarm to sound an alarm through the control loop.

[0014] In one embodiment of the present invention, a box door is further included, wherein the box door is connected to the box body, and the shielding layer is fixed on the inner wall of the box door.

[0015] In an embodiment of the present invention, the box body and the box door are made of stainless steel.

[0016] In one embodiment of the present invention, the shielding layer is a tungsten-containing organic silicon composite flexible shielding material.

[0017] In an embodiment of the present invention, the thickness of the shielding layer is greater than or equal to 2 mm.

[0018] In one embodiment of the present invention, it further comprises a plurality of connecting members, the box body is fixed to the wall through the connecting members, and the plurality of connecting members are symmetrically connected to the periphery of the box body.

[0019] In one embodiment of the present invention, it also includes:

[0020] A guide rail fixed to the inner wall of the box; and

[0021] The terminal block is fixed on the guide rail, and the output module is electrically connected to the signal input line, the signal output line, the power input line, the power output line, and the alarm line through the terminal block.

[0022] In one embodiment of the present invention, a ground terminal is further included, one end of the ground terminal is electrically connected to the ground wire of the output module and / or the terminal block, and the other end of the ground terminal is electrically connected to the ground or the wall.

[0023] In one embodiment of the present invention, the connection cable between the output module and the terminal block is a fire-resistant copper core wire with a combustion performance not lower than B2 level.

[0024] In one embodiment of the present invention, the signal input line, the signal output line, the power input line, the power output line, and the alarm line located inside the box are fire-resistant copper core wires with a combustion performance not lower than B2 level.

[0025] In one embodiment of the present invention, a through hole is opened on one side of the bottom of the box body, and the signal input line, the signal output line, the power input line, the power output line, and the alarm line are electrically connected to the output module through the corresponding through holes.

[0026] In one embodiment of the present invention, a sealing joint is further included, and the sealing joint corresponds to the through hole. The signal input line, the signal output line, the power input line, the power output line, and the alarm line are respectively fixed to the through hole through corresponding sealing joints.

[0027] In one embodiment of the present invention, the sealing joint is a cable gland, and the material of the cable gland is polycarbonate or stainless steel.

[0028] In an embodiment of the present invention, the protection grade of the box is IP65.

[0029] The present invention also provides a fire alarm system for a nuclear power plant, comprising the fire alarm system control box for the nuclear power plant.

[0030] As described above, the present invention provides a fire alarm system control box and a fire alarm system for a nuclear power plant. By applying tungsten-containing silicone composite flexible shielding materials in the module box, its radiation resistance is greatly improved, so that it can operate safely and reliably in the high radiation environment of the nuclear island of the nuclear power plant. The module box can be designed for the connection of fire sound and light alarms and the like to the automatic fire alarm system loop, and can adapt to the installation requirements of special environments such as nuclear power plants, ensuring the stable operation of the system in high-risk areas. The module box design has good engineering installation applicability. In actual applications, installation and maintenance are more convenient and efficient, reducing construction time and difficulty. The module box is equipped with a standard wiring diagram, which ensures easy understanding and operation during construction and use, improves the versatility and maintainability of the module box, and facilitates system integration and subsequent upgrades.

[0031] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0033] Figure 1 It is a schematic diagram of a box body of a fire alarm system control box of a nuclear power plant in one embodiment of the present invention;

[0034] Figure 2This is a schematic diagram of the connection between an output module and a terminal block of a fire alarm system control box of a nuclear power plant in one embodiment of the present invention;

[0035] Figure 3 The figure is a schematic diagram of a fire alarm system of a nuclear power plant according to an embodiment of the present invention.

[0036] In the figure: 10, box body; 20, shielding layer; 30, output module; 40, terminal block; 50, guide rail; 60, connector; 70, sealing joint; 80, grounding terminal; 91, signal input line; 92, signal output line; 93, power input line; 94, power output line; 95, alarm circuit; 96, resistor; 97, sound and light alarm. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] See also Figure 1 The present invention provides a fire alarm system control box for a nuclear power plant. The fire alarm system control box may include a box body 10, a box door, a shielding layer 20, an output module 30, a terminal block 40, a guide rail 50, a connector 60, a sealing joint 70 and a grounding terminal 80.

[0039] See also Figure 1 In one embodiment, the box 10 can be fixed to the wall by a suitable fixing device to ensure the stability of its installation. The shape of the box 10 is not limited and can be selected as a regular or irregular shape according to actual needs. In this embodiment, the box 10 adopts a rectangular parallelepiped shape with specific dimensions of 200 mm in width, 200 mm in height, and 150 mm in depth. Such a design is easy to install and use.

[0040] In one embodiment, the box body 10 is provided with a door, which is hingedly connected to the box body and can be rotated around the hinge point to be opened or closed. When the door is closed, the interior of the box body 10 can be effectively sealed. To ensure the safety of the items inside, the door is designed with a lock switch, and the user can lock or open the door by a key or other safe opening method.

[0041] See also Figure 1In one embodiment, in order to adapt to various harsh use environments (such as high radiation environments in nuclear power plants), the box 10 can have a high level of protection performance, and its protection level reaches IP65, so that the box 10 can provide excellent waterproof and dustproof protection, and can effectively prevent water jets and dust from entering the box 10, thereby ensuring the safety and integrity of internal equipment or materials. The material of the box 10 and the door can be unlimited. In this embodiment, the material can be stainless steel.

[0042] See also Figure 1 In one embodiment, a specially designed shielding layer 20 is fixed on the inner wall of the box body 10 and the box door. The main function of the shielding layer 20 is to reduce the impact of external nuclear radiation on the electronic components in the box body 10 to protect their normal operation. The material of the shielding layer 20 can be a tungsten-containing organic silicon composite flexible shielding material, which has excellent shielding performance and can be selected as a key material for reducing radiation dose.

[0043] In one embodiment, the thickness of the shielding layer 20 can be designed to be greater than or equal to 2 mm. This thickness is selected to ensure the shielding effect while not affecting the internal space and overall weight of the box 10. The tungsten-containing organic silicon composite material not only has good flexibility and adaptability, but also can effectively absorb and attenuate radiation doses, providing reliable radiation protection.

[0044] In one embodiment, to ensure that the shielding layer 20 is tightly combined with the inner wall of the box body 10 and the box door, this embodiment provides a variety of fixing methods, including gluing and bolting, etc. The gluing method uses a high-strength, durable adhesive to firmly fix the shielding layer 20 on the inner wall while maintaining the flatness and integrity of the surface.

[0045] See also Figure 1 and Figure 2 In one embodiment, the output module 30 may be of model FCM-1, and is securely mounted inside the housing 10 by bolts or other suitable fixing devices.

[0046] See also Figure 1 and Figure 2In one embodiment, a guide rail 50 is designed inside the box 10, and the installation of the guide rail 50 provides a flexible way to fix and arrange components. The terminal block 40 can be slidably / fixedly connected to the guide rail. This design facilitates the installation and replacement of the terminal block 40 and allows the system to be quickly configured as needed. The output module 30 can be electrically connected to various cables and devices in the outside world through the terminal block 40 to achieve different functions. The model of the terminal block 40 can be WDU4. The connecting cable between the output module 30 and the terminal block 40 is a fire-resistant copper core wire with a combustion performance not lower than Class B2. The signal input line 91, the signal output line 92, the power input line 93, the power output line 94, and the alarm line 95 can also be a fire-resistant copper core wire with a combustion performance not lower than Class B2.

[0047] See also Figure 2 In one embodiment, the output module 30 forms an alarm circuit through electrical connection, and is respectively connected to the external signal input line 91 and the signal output line 92. The main function of the alarm circuit is to receive and process the fire alarm signal. The fire detector in the external environment transmits the signal to the output module 30. When a fire alarm is detected, the output module 30 processes the signal and transmits it to the corresponding sound and light alarm 97, so as to achieve a timely response to the fire alarm event.

[0048] In one embodiment, the signal input line 91 and the signal output line 92 may be designed as signal cables to effectively transmit data signals.

[0049] In one embodiment, the signal input line 91 can be divided into two loop lines: a first loop line SLC+ and a first loop line SLC-. The first loop line SLC- is equipped with a dedicated first shielding line to reduce the impact of external electromagnetic interference on signal stability. The first loop line SLC+, the first loop line SLC- and the first shielding line are respectively connected to pins 1, 2 and 3 of the terminal block 40. This configuration ensures the accuracy and anti-interference ability of the signal input.

[0050] In one embodiment, the signal output line 92 is also divided into two loop lines: a second loop line SLC+ and a second loop line SLC-. A second shielding line is designed on the second loop line SLC+ to further enhance the anti-interference performance during the signal output process. The second loop line SLC+, the second loop line SLC- and the second shielding line are respectively connected to pins 5, 6 and 4 of the terminal block 40. Such a layout optimizes the transmission quality of the signal output.

[0051] In one embodiment, pin 3 and pin 4 of the terminal block 40 are connected in series. This series design provides a continuous shielding loop, providing an additional shielding barrier for the input and output of the entire system signal, ensuring the integrity of signal transmission.

[0052] In one embodiment, the first circuit line SLC+ and the first circuit line SLC- of the output module 30 are respectively connected to the No. 1 and No. 2 pins of the terminal block 40, so that the output module 30 can accurately receive the signal from the signal input line 91 and maintain efficient signal transmission. The second circuit line SLC+ and the second circuit line SLC- of the output module 30 are respectively connected to the No. 5 and No. 6 pins of the terminal block 40 to ensure that the signal is transmitted to the output line and finally reaches the target device.

[0053] See also Figure 2 In one embodiment, in order to provide stable power support for the output module 30, the output module 30 also forms a power supply circuit through a power input line 93 and a power output line 94. The power supply circuit ensures that the output module 30 can work in a good electrical environment under any circumstances and maintain a continuous and uninterrupted operation state.

[0054] In one embodiment, the power input line 93 and the power output line 94 can be used to transmit DC 24V to ensure stable operation of the output module 30 and its external devices.

[0055] In one embodiment, the power input line 93 is divided into a first power line + and a first power line -. The first power line + and the first power line - can be connected to the 7th and 9th pins of the terminal row, respectively. The power output line 94 is divided into a second power line + and a second power line -. The second power line + and the second power line - are connected to the 8th and 10th pins of the terminal row, respectively. This configuration ensures the line integrity and effective transfer of energy when the power is transmitted from the output module 30 to the external device.

[0056] In one embodiment, the positive power line of the output module 30 is connected to pin 7 of the terminal block, and the negative power line is connected to pin 9. In order to provide a continuous power supply loop, pins 7 and 8 of the terminal block are connected in series, and similarly, pins 9 and 10 are connected in series. This series design ensures that the input and output of the power supply form a closed loop in the circuit to ensure the convenience of power output.

[0057] See also Figure 2 In one embodiment, the output module 30 is electrically connected to an external alarm circuit 95, a resistor 96 and an audible and visual alarm 97 to form a control loop. The function of the control loop is to control the audible and visual alarm 97 to give an alarm when the output module 30 receives a fire alarm signal. The audible and visual alarm 97 combines sound and light prompts, which can significantly improve the effectiveness of the alarm and ensure that nearby personnel can be notified of the emergency situation at the first time.

[0058] In one embodiment, the alarm circuit 95 can be used to connect the terminal block 40 and the sound and light alarm 97 to form a transmission path for the alarm signal. One end of the alarm circuit 95 is respectively connected to the No. 11 and No. 12 pins of the terminal block 40. The other end of the alarm circuit 95 is respectively connected to the two ends of the sound and light alarm 97 to achieve direct control of the sound and light alarm. Upon receiving the alarm signal, the sound and light alarm 97 can respond immediately and sound an alarm to alert the surrounding environment. The output module 30 can be connected to the No. 11 and No. 12 pins of the terminal block, thereby ensuring that the alarm signal can be transmitted from the output module 30 to the alarm circuit and effectively activate the sound and light alarm 97.

[0059] In one embodiment, the resistor 96 is connected in parallel with the sound and light alarm 97. This design provides an additional function of detecting the continuity of the circuit.

[0060] See also Figure 1 In one embodiment, the number of the connectors 60 can be multiple, in order to provide sufficient support force to firmly fix the box 10. The connector 60 can be designed as an L-shaped structure. This shape helps to increase the structural strength of the connector and provide stable fixed support. Multiple connectors 60 can be symmetrically distributed around the periphery of the box 10. The symmetrical distribution not only improves the stability of the box 10, but also ensures uniform force during installation, reducing the risk of tilting or deformation that may be caused by unilateral force.

[0061] In one embodiment, one end of the connector 60 is fixed to the housing 10 by bolts. Bolt fixing provides a reliable connection method, ensuring that the connection between the connector and the housing is firm and can withstand large external forces. The other end of the connector 60 is fixed to the wall by bolts. This design allows the housing 10 to be firmly fixed to the wall to avoid displacement due to external vibration or collision. Through bolt connection, users can easily install and disassemble, while avoiding the secondary pollution problem caused by traditional adhesive fixing methods.

[0062] See also Figure 2 In one embodiment, a plurality of through holes may be provided on one side of the bottom of the box 10, and these through holes are used for wiring to realize the electrical connection between various signal lines and power lines and the output module 30. Specifically, the signal input line 91, the signal output line 92, the power input line 93, the power output line 94, and the alarm line 95 are connected to the output module 30 through corresponding through holes. Each through hole is reasonably distributed according to the function and direction of each cable, ensuring that the line can enter the interior of the box 10 conveniently and neatly.

[0063] In one embodiment, each through hole is equipped with a sealing joint 70 for fixing and sealing various cables passing through. The sealing joint 70 adopts a cable gland structure, which can effectively prevent external factors such as dust and moisture from affecting the electrical components inside the box. The material of the cable gland is selected from polycarbonate or stainless steel to provide good adaptability in the high radiation environment of a nuclear power plant.

[0064] See also Figure 2 In one embodiment, the ground terminal 80 can be fixed to one side of the bottom of the box 10, and a position close to the output module 30 and the terminal block 40 is selected to facilitate the connection and management of the ground wire. One end of the ground terminal 80 is electrically connected to the ground wire of the output module 30 and / or the terminal block 40. This connection method ensures that all electrical components inside the box 10 can be uniformly grounded through the ground terminal. By sharing the ground wire with the output module 30 and the terminal block 40, the potential dangers caused by electrical noise and potential differences are further reduced. The other end of the ground terminal 80 is electrically connected to the ground or wall through a wire. This connection provides a low-impedance path so that any leakage current can be quickly introduced into the ground or a safe wall to prevent the equipment from causing harm to the operator due to insulation failure.

[0065] See also Figure 3 The present invention also provides a fire alarm system for a nuclear power plant, which may include one or more fire alarm system control boxes for a nuclear power plant in the above-mentioned embodiments to monitor fire alarm signals in various key areas within the nuclear power plant.

[0066] It can be seen that in the above scheme, by applying tungsten-containing silicone composite flexible shielding materials in the module box, its radiation resistance is greatly improved, so that it can operate safely and reliably in the high radiation environment of the nuclear island of the nuclear power plant. The module box can be designed for the connection of the fire automatic alarm system circuit for the fire sound and light alarm, etc., and can adapt to the installation requirements of special environments such as nuclear power plants, ensuring the stable operation of the system in high-risk areas. The module box design has good engineering installation applicability. In practical applications, installation and maintenance are more convenient and efficient, reducing construction time and difficulty. The module box is equipped with a standard wiring diagram, which ensures easy understanding and operation during construction and use, improves the versatility and maintainability of the module box, and facilitates system integration and subsequent upgrades.

[0067] The embodiments of the present invention disclosed above are only used to help illustrate the present invention. The embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A fire alarm system control box for a nuclear power plant, characterized in that: include: The box is fixed on the wall; A shielding layer is fixed on the inner wall of the box; as well as An output module is fixed in the box; The output module is electrically connected to the signal input line and the signal output line to form an alarm circuit, and the output module receives the fire alarm signal through the alarm circuit; The output module is also electrically connected to the power input line and the power output line to form a power supply circuit, and the power supply circuit is used to supply power to the output module; The output module is also electrically connected to the alarm circuit and the sound and light alarm to form a control loop. When the output module receives the fire alarm signal, it controls the sound and light alarm to sound an alarm through the control loop.

2. The fire alarm system control box of a nuclear power plant according to claim 1, characterized in that: It also includes a box door, which is connected to the box body, and the shielding layer is fixed on the inner wall of the box door.

3. The fire alarm system control box of a nuclear power plant according to claim 2, characterized in that: The box body and the box door are made of stainless steel.

4. The fire alarm system control box of a nuclear power plant according to claim 1 or 2, characterized in that: The shielding layer is a tungsten-containing organic silicon composite flexible shielding material.

5. The fire alarm system control box of a nuclear power plant according to claim 3, characterized in that: The thickness of the shielding layer is greater than or equal to 2 mm.

6. The fire alarm system control box of a nuclear power plant according to claim 1, characterized in that: It also includes a plurality of connecting pieces, through which the box is fixed to the wall, and a plurality of the connecting pieces are symmetrically connected to the periphery of the box.

7. The fire alarm system control box of a nuclear power plant according to claim 1, characterized in that: Also includes: A guide rail fixed to the inner wall of the box; as well as The terminal block is fixed on the guide rail, and the output module is electrically connected to the signal input line, the signal output line, the power input line, the power output line, and the alarm line through the terminal block.

8. The fire alarm system control box of a nuclear power plant according to claim 7, characterized in that: It also includes a grounding terminal, one end of which is electrically connected to the ground wire of the output module and / or the terminal block, and the other end of which is electrically connected to the ground or the wall.

9. The fire alarm system control box of a nuclear power plant according to claim 7, characterized in that: The connecting cable between the output module and the terminal block is a fire-resistant copper core wire with a combustion performance not lower than B2 level.

10. The fire alarm system control box of a nuclear power plant according to claim 1 or 7, characterized in that: The signal input line, the signal output line, the power input line, the power output line, and the alarm line located inside the box are fire-resistant copper core wires with a combustion performance not lower than B2 level.

11. The fire alarm system control box of a nuclear power plant according to claim 1, characterized in that: A through hole is provided on one side of the bottom of the box body, and the signal input line, the signal output line, the power input line, the power output line, and the alarm line are electrically connected to the output module through the corresponding through holes.

12. The fire alarm system control box of a nuclear power plant according to claim 11, characterized in that: It also includes a sealing joint, which corresponds to the through hole, and the signal input line, the signal output line, the power input line, the power output line, and the alarm line are respectively fixed to the through hole through the corresponding sealing joints.

13. The fire alarm system control box of a nuclear power plant according to claim 12, characterized in that: The sealing joint is a cable gland, and the material of the cable gland is polycarbonate or stainless steel.

14. The fire alarm system control box of a nuclear power plant according to claim 12, characterized in that: The protection grade of the box is IP65.

15. A fire alarm system for a nuclear power plant, characterized in that: A fire alarm system control box for a nuclear power plant comprising any one of claims 1 to 14.

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