A seismic-resistant cabinet with bracket for nuclear power plant

Abstract

The present invention relates to a nuclear power plant earthquake-resistant cabinet with a bracket, which belongs to the technical field of nuclear power plant instrumentation and control equipment. The earthquake-resistant cabinet mainly includes a cabinet body with front and rear double doors, an earthquake-resistant bracket, a server-specific tray, a top heat sink and various accessories; the cabinet body and the earthquake-resistant bracket are connected by high-strength screws, and the earthquake-resistant bracket and the embedded parts embedded in the floor are welded into a whole; the skeleton of the earthquake-resistant bracket is formed by welding a plurality of channel steels, and reinforcement plates are arranged at the welding places of adjacent channel steels, and support frames are arranged between the channel steels. The present invention can meet the use requirements of earthquake-resistant cabinets in electronic equipment rooms with raised floors in nuclear power plants. The earthquake-resistant cabinet can be directly installed on the embedded parts of the floor through the earthquake-resistant bracket without the need to build an additional concrete base. At the same time, a special tray is designed for the server inside to maximize the server function and performance in the event of an earthquake.

Description

Technical Field

[0001] The invention belongs to the technical field of instrumentation and control equipment for nuclear power plants, and in particular relates to an earthquake-resistant cabinet with a bracket for nuclear power plants. Background Art

[0002] The instrumentation and control equipment of nuclear power plants need to be installed in cabinets. For occasions with earthquake resistance requirements, the functions and performance of the instrumentation and control equipment during earthquakes are mainly realized by the cabinets they carry. Especially for rooms with raised floors and lower incoming cables (generally where servers are located), there is currently no special lower incoming cable earthquake resistance equipment on the market, or it is necessary to build suitable earthquake-resistant columns (the same height as the raised floor) in advance during civil construction. This is not only economical but also the subsequent earthquake resistance effect cannot be guaranteed. Summary of the invention

[0003] In order to solve the defects of the prior art, the purpose of the present invention is to provide a nuclear power plant earthquake-resistant cabinet with a bracket, which is suitable for places with raised floors and lower wiring, so as to fill the current technical gap in this field.

[0004] In order to achieve the above purpose, a technical solution adopted by the present invention is:

[0005] A nuclear power plant earthquake-resistant cabinet with a bracket, mainly comprising a cabinet body and an earthquake-resistant bracket fixed to the bottom of the cabinet body, wherein the earthquake-resistant bracket is fixedly connected to an embedded part embedded in a floor as a whole;

[0006] The cabinet body mainly includes a front door and a rear door, and a plurality of negative pressure heat dissipation holes are opened on the front door and the rear door, and a heat dissipation plate is arranged on the top of the cabinet body; the negative pressure heat dissipation holes and the heat dissipation plate constitute the heat dissipation system of the earthquake-resistant cabinet;

[0007] A server-specific tray for carrying and fixing the server is fixedly arranged inside the cabinet body, and the server-specific tray includes a tray with heat dissipation holes and a clamp fixed on the tray with heat dissipation holes, and the height of the clamp can be adjusted according to the height of different types of servers;

[0008] The frame of the earthquake-resistant support is formed by welding a plurality of channel steels, reinforcement sheets are arranged at the welding places of adjacent channel steels, and support frames are arranged between the channel steels.

[0009] Furthermore, in the earthquake-resistant cabinet with bracket for a nuclear power plant as described above, the cabinet body and the earthquake-resistant bracket are connected by high-strength screws, and the earthquake-resistant bracket and the embedded parts embedded in the floor are welded into a whole.

[0010] Furthermore, in the earthquake-resistant cabinet with bracket for nuclear power plant as described above, the front door and the rear door adopt a double-door structure, each door is connected to the cabinet body by a plurality of hinges, and the maximum door opening angle is 120°.

[0011] Furthermore, in the earthquake-resistant cabinet with bracket for a nuclear power plant as described above, door cross bars are arranged on the inner sides of the front door and the rear door to reduce the deformation of the cabinet door when an earthquake occurs.

[0012] Furthermore, in the earthquake-resistant cabinet with bracket for nuclear power plant as described above, a conductive strip is arranged on the cabinet body, and when the door is closed, the front door and the rear door can be tightly crimped with the conductive strip, so that the whole cabinet forms a complete electromagnetic shielding body.

[0013] Furthermore, in the earthquake-resistant cabinet with bracket for nuclear power plant as described above, the bottom of the heat sink is provided with eight DC heat sink fans, heat sink is provided with heat dissipation holes around, and the top surface is sealed.

[0014] Furthermore, in the earthquake-resistant cabinet with bracket for a nuclear power plant as described above, an alarm light is arranged on the outside of the cabinet body, and the alarm light is logically connected with the internal equipment to control the alarm light to present different colors in different situations.

[0015] Furthermore, in the earthquake-resistant cabinet with bracket for nuclear power plant as described above, a work light and a door-controlled contactor are arranged inside the cabinet body. The door-controlled contactor and the work light are interlocked through a control device. When the door is opened, the work light is automatically lit, so that maintenance personnel can carry out maintenance at any time.

[0016] Furthermore, in the earthquake-resistant cabinet with bracket for nuclear power plant as described above, a large concave cover plate is fixedly provided inside the cabinet body for installing wiring terminals and small bayonet-connected equipment inside the cabinet.

[0017] Furthermore, in the earthquake-resistant cabinet with a bracket for a nuclear power plant as described above, a grounding copper busbar is arranged inside the cabinet body, which is used to connect all grounding cables that need to be grounded internally and to lead the grounding wires of the earthquake-resistant cabinet to a unified grounding busbar in the room externally; the grounding copper busbar is separated from the cabinet body by an insulator to achieve isolation.

[0018] The use of the earthquake-resistant cabinet with bracket for a nuclear power plant according to the present invention has the following significant technical effects:

[0019] 1. The earthquake-resistant cabinet can be directly installed on the embedded parts of the floor through the earthquake-resistant bracket, without the need to build an additional concrete base;

[0020] 2. The server can be effectively fixed and protected by a dedicated server tray, which can maximize the server function and performance in the event of an earthquake. It can meet the use requirements of earthquake-resistant cabinets in electronic equipment rooms with raised floors in nuclear power plants. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of a nuclear power plant earthquake-resistant cabinet with a bracket provided in an embodiment of the present invention;

[0022] Figure 2 It is a schematic diagram of the cabinet body structure;

[0023] Figure 3 It is a schematic diagram of the internal structure of the cabinet body;

[0024] Figure 4 This is a schematic diagram of the structure of a dedicated tray for a server;

[0025] Figure 5 is a schematic diagram of the structure of the top heat sink;

[0026] Figure 6 This is a schematic diagram of the heat dissipation inside the cabinet;

[0027] Figure 7 is a schematic diagram of the structure of the bottom bracket;

[0028] Figure 8 This is a welding diagram of the bottom bracket;

[0029] In the figure: 1-cabinet body; 2-seismic bracket; 3-front door; 4-rear door; 5-negative pressure heat dissipation hole; 6-hanging ring; 7-warning light; 8-top heat sink; 9-top work light 9, 10-door control contactor; 11-server special tray; 12-concave large cover plate; 13-grounding copper busbar; 14-wiring trough; 15-triangular reinforcement plate; 16-support frame. DETAILED DESCRIPTION

[0030] The present invention will be further described below in conjunction with specific embodiments and the accompanying drawings.

[0031] As mentioned in the background technology, the present invention proposes a new design to solve these problems. The original anti-seismic columns are replaced with anti-seismic brackets that are compatible with the cabinet body, so that it becomes a whole, and the anti-seismic performance is guaranteed through overall anti-seismic tests and analysis. At the same time, by optimizing the internal structure design, heat dissipation design, human factors design, etc., the entire cabinet has a good environment and convenient operation.

[0032] Figure 1 The overall structural schematic diagram of a nuclear power plant earthquake-resistant cabinet with a bracket provided by an embodiment of the present invention is shown. The earthquake-resistant cabinet mainly includes a cabinet body 1 and an earthquake-resistant bracket 2 fixed to the bottom of the cabinet body 1. The earthquake-resistant bracket 2 is fixedly connected to an embedded part embedded in the floor as a whole.

[0033] In this embodiment, the cabinet body 1 and the anti-seismic bracket 2 are connected by high-strength screws, which ensures anti-seismic performance and facilitates transportation and on-site installation. The high-strength screws used are stainless steel hexagonal screws, 12.9 grade carbon steel, and are equipped with spring washers, flat washers and nuts, which can effectively prevent the connection from loosening.

[0034] In order to ensure the overall stability and reliability of the earthquake-resistant cabinet when an earthquake occurs, the earthquake-resistant bracket 2 is welded to the embedded parts embedded in the floor of the building into a whole. The welding point position is as follows: Figure 8 As shown, the welding points are evenly arranged around the seismic bracket 2. It should be noted that before welding, the surface coating needs to be mechanically removed until the metal color is exposed and the weld is polished flat, and then the J422 welding rod is used for welding. After welding, the welding spatter needs to be cleaned. According to the requirements of ISO5817 Class C, the weld needs to be 100% inspected for process and the suspected weld accessories need to be penetrated for inspection.

[0035] Figure 2 Schematic diagram of the structure of the cabinet body 1 , the cabinet body 1 mainly includes a front door 3 and a rear door 4 , a plurality of negative pressure heat dissipation holes 5 are opened on the front door 3 and the rear door 4 , and a heat dissipation plate 8 is arranged on the top of the cabinet body 1 .

[0036] Considering the limited space for cabinet layout and human factors, the front door 3 and the rear door 4 adopt a double-door structure. Each door is connected to the cabinet body 1 through multiple hinges, and the maximum door opening angle is 120°, which avoids the problem of a large operating space required by a single door. At the same time, since most servers are wired from the back, the rear door is also conducive to wiring and equipment maintenance.

[0037] In order to ensure earthquake resistance, door cross bars are arranged inside the front door 3 and the rear door 4 to minimize the deformation of the cabinet door during an earthquake. At the same time, when the front and rear doors are closed, they are tightly crimped with the conductive strips of the cabinet body 1, so that the entire cabinet forms a complete electromagnetic shielding body, improving the EMC capability of the internal instrumentation and control equipment.

[0038] The heat sink 8 located on the top of the cabinet body 1 has a structure as follows: Figure 5 As shown, the bottom is composed of eight DC cooling fans, and cooling holes are provided around the heat sink 8. In order to prevent other equipment from dripping or dust from entering directly above the cabinet, the top surface of the heat sink 8 is sealed.

[0039] The negative pressure heat dissipation holes 5 under the front and rear cabinet doors and the heat dissipation plate 8 at the top constitute the heat dissipation system in the entire cabinet. The heat dissipation schematic diagram inside the cabinet body is shown in FIG. Figure 6 As shown, negative pressure is formed in the cabinet through the exhaust effect of the heat sink 8, so that external cold air enters the equipment in the cabinet through the negative pressure heat dissipation holes 5 at the lower side of the cabinet and takes away the heat, gradually turning into hot air, reducing its density and moving upward, and finally being drawn away by the DC heat dissipation fan. The hot air is guided out of the cabinet through the heat dissipation holes around the equipment, thereby accelerating the air circulation and heat dissipation of the cabinet, so that the internal equipment always works at a suitable temperature.

[0040] A lifting ring 6 for equipment transportation is also provided on the top of the cabinet body 1, and its maximum bearing weight is 600 kg.

[0041] The cabinet body 1 is provided with an alarm light 7 near the top and the front and rear sides, respectively, which can be used as a status light for routine inspection by maintenance personnel. Through the logical connection of the internal equipment, when a fault occurs in the equipment in the cabinet, the inspection personnel can confirm the fault by the color of the alarm light without opening the cabinet door, so that the fault can be located and solved in time. In this embodiment, the alarm light 7 uses a two-color light. When the cabinet is powered on and there is no fault, the alarm light 7 is a red light, when the cabinet is powered on and there is a fault, the alarm light 7 is a yellow light, and when the cabinet is not powered on, the alarm light 7 is off.

[0042] Figure 3 It is a schematic diagram of the internal structure of the cabinet body 1. The interior of the cabinet body 1 mainly includes a work light 9 located on the top, a door control contactor 10, a server-specific tray 11, a concave large cover plate 12, a grounding copper bus 13 and a wiring trough 14.

[0043] The door-controlled contactor 10 and the top working light 9 can be interlocked through a control device: when the door is not opened, the door-controlled contactor 10 controls the relay to be disconnected, and the working light 9 is not on; when the door is opened, the door-controlled contactor 10 controls the relay to be closed, and the working light 9 is lit, so that maintenance personnel can perform maintenance at any time.

[0044] The server tray 11 is used to carry and fix the server in the cabinet to ensure earthquake resistance. The two sides of the server tray 11 are connected to the cabinet body 1 by bolts. The structure of the server tray 11 is as follows: Figure 4 As shown, it is mainly composed of a tray with heat dissipation holes and a clamp. The clamp can be adjusted according to the height (1U / 2U) of different types of servers. Its function is to protect the server from excessive vibration during extreme working conditions such as earthquakes, thereby meeting the functional integrity of the entire cabinet during earthquakes. In this embodiment, the tray depth is 720mm, and two clamps are arranged in parallel on the tray, and a maximum of 6 2U servers can be installed. A special wire hole is opened under each server-specific tray 11 to facilitate the equipment to enter directly under the equipment through the wire hole, and finally route the wires through the special wiring grooves 14 on both sides of the cabinet.

[0045] The large concave cover plate 12 is located on the upper side of the cabinet and is used to install various wiring terminals and small bayonet-connected equipment in the cabinet, such as circuit breakers, relays, switches, fuses, photoelectric conversion modules, etc.; equipment can be installed on both sides of the large concave cover plate 12 (corresponding to the front door and the rear door), which is convenient for future hardware implementation by engineers.

[0046] The grounding copper busbar 13 located at the bottom inner side of the cabinet body 1 is used to connect all grounding cables that need to be grounded internally, and to lead the grounding wires of the entire cabinet to the unified grounding busbar in the room externally. In this embodiment, three independent grounding copper busbars 13 are provided, and the grounding copper busbars 13 are separated from the cabinet body 1 by insulating bakelite to achieve isolation, so as to be used for protection ground, working ground and shielding ground respectively. Each type of grounding is classified and summarized and connected to the main grounding equipment in the factory, and then connected to the equipotential grounding network of the entire factory to form an equipotential body. Specifically, in this embodiment, each grounding copper busbar 13 is 6mm thick and 25mm wide, and the maximum single grounding cable core it supports is 16mm 2 , which can meet most of the on-site needs.

[0047] Figure 7 The structure diagram of the seismic bracket 2 is shown in FIG. 2 . The seismic bracket 2 is mainly composed of channel steel, reinforcement sheet 15 and support frame 16. In this embodiment, the main structure of the seismic bracket 2 is welded by twenty-one GB / T7007 channel steels. In order to meet the seismic requirements, twelve triangular reinforcement sheets 15 are added to the channel steel welding part, and eight 055 and four 301 support frames 16 are designed inside to further increase the longitudinal support force of the seismic bracket 2. A plurality of screw holes are provided on the top of the seismic bracket 2 for connecting with the cabinet body 1.

[0048] The earthquake-resistant cabinet with a bracket for a nuclear power plant provided by the present invention can be directly installed on the embedded floor parts through its bottom bracket without the need to build an additional concrete base. At the same time, a special tray is designed for the server inside the cabinet to maximize the function and performance of the server in the event of an earthquake, and can meet the use needs of the earthquake-resistant cabinet in the electronic equipment room with raised floor requirements in the nuclear power plant.

[0049] The above embodiments are merely illustrative of the present invention, and the present invention may also be implemented in other specific ways or other specific forms without departing from the gist or essential features of the present invention. Therefore, the described embodiments should be considered illustrative rather than restrictive in any respect. The scope of the present invention should be described by the appended claims, and any changes equivalent to the intent and scope of the claims should also be included within the scope of the present invention.

Claims

1. A nuclear power plant earthquake-resistant cabinet with bracket, characterized in that: The earthquake-resistant cabinet is suitable for indoor places with raised floors and bottom wiring, and mainly comprises a cabinet body (1) and an earthquake-resistant bracket (2) fixed to the bottom of the cabinet body (1), and the earthquake-resistant bracket (2) is fixedly connected to the embedded parts embedded in the floor as a whole; The cabinet body (1) mainly comprises a front door (3) and a rear door (4), and a plurality of negative pressure heat dissipation holes (5) are provided on the front door (3) and the rear door (4). A heat dissipation plate (8) is provided on the top of the cabinet body (1); the negative pressure heat dissipation holes (5) and the heat dissipation plate (8) constitute the heat dissipation system of the earthquake-resistant cabinet, and the bottom of the heat dissipation plate (8) is provided with eight DC heat dissipation fans, and the heat dissipation holes are provided around the heat dissipation plate (8), and the top surface thereof is sealed; through the exhaust effect of the heat dissipation plate, negative pressure is formed in the cabinet, so that external cold air enters the equipment in the cabinet through the negative pressure heat dissipation holes at the lower side of the cabinet and takes away heat, gradually turning into hot air, the density of the hot air decreases and moves upward, and finally is sucked away through the DC heat dissipation fan, and the hot air is guided out of the cabinet through the heat dissipation holes around the equipment, thereby accelerating the air circulation and heat dissipation of the cabinet, so that the internal equipment always works at a suitable temperature; A dedicated server tray (11) for carrying and fixing a server is fixedly arranged inside the cabinet body (1), the dedicated server tray (11) comprising a tray with heat dissipation holes and a clamp fixed on the tray with heat dissipation holes, the height of the clamp being adjustable according to the height of different types of servers; The frame of the earthquake-resistant support (2) is formed by welding a plurality of channel steels, reinforcement sheets (15) are provided at the welding positions of adjacent channel steels, and support frames (16) are provided between the channel steels; The cabinet body (1) is provided with a conductive strip, and when the door is closed, the front door (3) and the rear door (4) can be tightly pressed against the conductive strip, so that the earthquake-resistant cabinet forms a complete electromagnetic shielding body.

2. The earthquake-resistant cabinet with bracket for nuclear power plant according to claim 1, characterized in that: The cabinet body (1) and the anti-seismic bracket (2) are connected by high-strength screws, and the anti-seismic bracket (2) and the embedded parts embedded in the floor are welded into a whole.

3. The earthquake-resistant cabinet with bracket for nuclear power plant according to claim 1, characterized in that: The front door (3) and the rear door (4) adopt a double-door structure, each door is connected to the cabinet body (1) via a plurality of hinges, and the maximum door opening angle is 120°.

4. The earthquake-resistant cabinet with bracket for nuclear power plant according to claim 3, characterized in that: Door cross bars are arranged on the inner sides of the front door (3) and the rear door (4) to reduce the deformation of the cabinet doors when an earthquake occurs.

5. The earthquake-resistant cabinet with bracket for nuclear power plant according to claim 1, characterized in that: An alarm light (7) is arranged on the outside of the cabinet body (1); the alarm light (7) is logically connected to the internal device, and the alarm light (7) is controlled to present different colors under different circumstances.

6. The earthquake-resistant cabinet with bracket for nuclear power plant according to claim 1, characterized in that: A working light (9) and a door control contactor (10) are arranged inside the cabinet body (1); the door control contactor (10) and the working light (9) are interlocked through a control device; when the door is opened, the working light (9) is automatically lit, making it convenient for maintenance personnel to carry out maintenance at any time.

7. The earthquake-resistant cabinet with bracket for nuclear power plant according to claim 1, characterized in that: A large concave sealing plate (12) is fixedly arranged inside the cabinet body (1) and is used for installing wiring terminals in the cabinet and equipment with small bayonet connections.

8. The earthquake-resistant cabinet with bracket for nuclear power plant according to any one of claims 1, 5 to 7, characterized in that: A grounding copper busbar (13) is arranged inside the cabinet body (1) and is used to internally connect all grounding cables that need to be grounded and externally lead the grounding wires of the earthquake-resistant cabinet to a unified grounding busbar in the room; the grounding copper busbar (13) is separated from the cabinet body (1) by an insulator to achieve isolation.

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