Electrical cabinet with fireproof flame-retardant layer

Abstract

The invention discloses an electrical cabinet with a fireproof flame-retardant layer, and relates to the technical field of equipment fire protection, the electrical cabinet comprises a cabinet body, the cabinet body adopts a frame-type structure and is composed of stand columns and cross beams, the stand columns and the cross beams are welded and sealed by metal plates, fireproof flame-retardant plates are mounted inside and outside the side wall of the cabinet body, an opening is formed in the back surface of the cabinet body, and the opening is communicated with the opening. And an inner back plate is mounted at the opening. Fireproof flame-retardant plates such as magnesium oxide plates or calcium silicate plates are arranged on the inner side wall and the outer side wall of the cabinet body and combined with surface fireproof coatings to form double fireproof barriers, so that fire disasters of internal electrical equipment can be prevented from being conducted to the cabinet body, and invasion of external fire sources can be resisted; the inner back plate of which the back is made of a fireproof material is connected with the suspension plate through the honeycomb-shaped fireproof and flame-retardant heat dissipation cylinder, efficient heat dissipation is realized by using an open structure, cold air enters the cabinet body through the heat dissipation cylinder for cooling, the internal spontaneous combustion risk is reduced, a long and narrow flame-retardant channel prevents flame from spreading through the heat dissipation cylinder, and both fireproof and heat dissipation performances are considered.

Description

Technical Field

[0001] The invention relates to the technical field of equipment fire protection, in particular to an electrical cabinet with a fireproof and flame-retardant layer. Background Art

[0002] Electrical cabinets are enclosures used to house and protect electrical equipment. They provide a stable operating environment for internal electrical components and safeguard functions such as power distribution, control, and signal transmission. Fire-retardant electrical cabinets utilize flame-retardant materials such as inorganic fireproof panels and fire-retardant coatings, or flame-retardant plastic components, both inside and outside the cabinet. These features prevent or slow the spread of flames and heat transfer in the event of a fire. This protects the electrical equipment within the cabinet, minimizing fire losses, while also reducing the risk of fire spread and safeguarding personnel and the surrounding environment.

[0003] For example, patent CN206759906U discloses a safety electrical cabinet, including a cabinet body, a first cavity and a second cavity are provided on the top of the cabinet body from bottom to top, and partitions with ventilation holes are provided between the cabinet body and the first cavity and between the first cavity and the second cavity; air inlet holes are provided on the side surfaces of the second cavity, and a first temperature sensor and a refrigeration device are provided in the cavity, and the first temperature sensor and the refrigeration device are electrically connected; an expansion fan is provided inside the first cavity; a fire extinguishing mechanism is provided on the cabinet body, and the wall surface of the cabinet body includes an anti-corrosion layer, a heat insulation layer, a flame retardant layer and a base layer from the outside to the inside; an anti-theft mechanism is provided at the front end of the cabinet body.

[0004] However, in order to achieve effective fire retardancy, existing technologies often increase the thickness of the fire retardant layer or use denser materials, which can hinder the dissipation of heat within the electrical cabinet. Electrical equipment generates significant heat during operation. Poor heat dissipation can cause equipment temperatures to rise, accelerating equipment aging and even leading to malfunctions. Furthermore, since electrical cabinets are typically wall-mounted, excessively high internal temperatures can be directly transferred to the back panel, which then transmits them to the wall on which they are mounted. This can also easily cause a fire outside the cabinet, which can then spread from the outside to the inside, affecting the cabinet's normal operation. Summary of the Invention

[0005] The object of the present invention is to provide an electrical cabinet with a fireproof and flame-retardant layer to solve the problem proposed in the background art that adding a flame-retardant layer to achieve a fireproof effect causes heat dissipation difference, which easily causes internal and external fires.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an electrical cabinet with a fire-retardant layer, comprising a cabinet body, the cabinet body adopts a frame structure, and is composed of columns and beams. The columns and beams are sealed by welding with metal plates. Fire-retardant panels are installed inside and outside the side walls of the cabinet body. An opening is provided on the back of the cabinet body, and an inner back panel is installed at the opening. Circular openings are evenly opened on the surface of the inner back panel, and heat dissipation tubes are installed in the circular openings. The heat dissipation tubes are composed of a honeycomb structure cylinder. The inner back panel and the heat dissipation tubes are both made of fire-retardant materials. A suspension plate is installed at the other end of the heat dissipation tube, and positioning tubes are installed at the four corners of the suspension plate. The suspension plate is installed on the wall through the positioning tube, and a gap for air to pass through is left between the suspension plate and the wall.

[0007] Preferably, a fixing bolt tube is provided at one end of the positioning tube, and a fastening nail is provided at the other end of the positioning tube. The positioning tube is fixedly connected to the wall. The fixing bolt tube is made of high-strength stainless steel, and the surface is hot-dip galvanized to enhance corrosion resistance; the connecting end of the fastening nail and the positioning tube is provided with anti-slip grooves, and the threaded internal wire structure can effectively prevent loosening caused by long-term vibration, thereby ensuring the stability of the connection between the suspension plate and the wall.

[0008] Preferably, the inner wall of the positioning cylinder is provided with a threaded internal wire that cooperates with the fastening nail. The fastening nail is threadedly connected to the positioning cylinder. The threaded internal wire adopts a fine thread design, which can provide higher connection accuracy and tensile strength than conventional coarse threads. A hexagonal drive groove is provided at the tail of the fastening nail, which is suitable for quick disassembly and assembly with standard tools, thereby improving on-site construction efficiency.

[0009] Preferably, one end of the fixing bolt tube is cut to form a column head, and the fixing bolt tube is inside the positioning tube through the inner cavity of the column head. The outer diameter of the column head and the inner diameter of the positioning tube are transitionally matched to ensure that the fixing bolt tube and the positioning tube are accurately aligned; a guide chamfer is provided on the end face of the column head with an angle of 30° to facilitate quick insertion of the positioning tube during installation and reduce alignment time.

[0010] Preferably, heat sinks are installed on the outside of the cabinet, and the front of the cabinet is movably connected to the cabinet door through a hinge. The heat sink is made of aluminum alloy, and the surface has heat dissipation holes arranged at a 45° angle, with a hole diameter of 5mm and a hole spacing of 10mm. Combined with the internal honeycomb fireproof heat dissipation grille, it can effectively prevent open flame particles with a diameter of ≥5mm from invading the interior of the cabinet while ensuring air circulation efficiency.

[0011] Preferably, a control button is provided at the center of the cabinet door, and a buckle is provided on one side of the cabinet door. The cabinet door is movably connected to the cabinet body through the buckle. The buckle adopts an "L"-shaped stainless steel component, and an elastic rubber pad is provided at the contact end with the cabinet body. When closed, it can form a sealing pressure to prevent smoke and dust from entering; the surface of the control button is covered with a fire-proof transparent acrylic cover, which has both operational convenience and flame barrier ability.

[0012] Preferably, the inner wall of the cabinet is fixedly connected with a card slot, and the inner wall of the card slot is slidably connected with a terminal board. A conductive lubricating coating is provided on the inner wall of the card slot to reduce the plugging and unplugging resistance of the terminal board while improving the reliability of the conductive connection; a fire-proof insulating edging is provided on the edge of the terminal board to prevent sparks from splashing onto the side wall of the cabinet when the terminal is short-circuited.

[0013] Preferably, the outer wall of the inner back panel is fixedly connected to a fixed frame, and mounting holes are opened at equal intervals on the surface of the fixed frame. The fixed frame and the inner back panel are bonded by a fireproof adhesive and fixed with countersunk screws; the diameter of the mounting hole is set to two specifications of φ10mm and φ12mm, which are suitable for M8 and M10 standard bolts and are compatible with the installation of external equipment of different sizes.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, fire-retardant boards such as magnesium oxide boards or calcium silicate boards are provided on the inner and outer walls of the cabinet, which are combined with surface fire-retardant coatings to form a double fire barrier, which can not only prevent the internal electrical equipment fire from transmitting to the cabinet, but also resist the invasion of external fire sources; the inner back plate made of fire-retardant material on the back is connected to the suspension plate through a honeycomb-shaped fire-retardant heat dissipation tube, and the open structure is used to achieve efficient heat dissipation. Cold air enters the cabinet through the heat dissipation tube to cool it down, reducing the risk of internal spontaneous combustion. At the same time, the narrow and long flame-retardant channel prevents the flame from spreading through the heat dissipation tube, taking into account both fire prevention and heat dissipation performance.

[0015] 2. In the present invention, the suspension plate can be quickly installed and disassembled on the wall through the fixing bolt tube and fastening nails of the positioning tube, and the terminal board that is slidably connected with the buckle of the cabinet door and the slot of the inner wall is convenient for equipment inspection and line maintenance; the mounting holes of the fixed frame on the outside of the inner back panel and the fireproof heat dissipation grille of the heat sink on the outside of the cabinet body realize structural modularization while ensuring functionality, thereby reducing installation and maintenance costs.

[0016] 3. In the present invention, the circuit system adopts fireproof cables, fireproof sockets and overcurrent and short-circuit protection devices to reduce the risk of fire caused by electrical faults from the source; the fireproof ventilation valves at the top and bottom vents are combined with ventilation fans to optimize air circulation and block the intrusion path of smoke and fire; the temperature and smoke sensors are linked to the intelligent monitoring system to support remote real-time monitoring and abnormal alarms, and the perfect design of the grounding device forms an integrated "prevention-monitoring-protection" safety system, which significantly improves the safety and reliability of the operation of the electrical cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the back structure of an electrical cabinet with a fire retardant layer according to the present invention; Figure 2 This is a schematic structural diagram of a suspension plate and an inner back plate in an electrical cabinet with a fire retardant layer according to the present invention; Figure 3 The internal structure of the cabinet of an electrical cabinet with a fire retardant layer of the present invention is shown in FIG. Figure 1 ; Figure 4 This is a structural cross-sectional view of a positioning cylinder in an electrical cabinet with a fire-retardant layer according to the present invention; Figure 5 The internal structure of the cabinet of an electrical cabinet with a fire retardant layer of the present invention is shown in FIG. Figure 2 ; Figure 6 A schematic diagram of the ventilation and heat dissipation structure of an electrical cabinet with a fire retardant layer according to the present invention Figure 1 ; Figure 7 A schematic diagram of the ventilation and heat dissipation structure of an electrical cabinet with a fire retardant layer according to the present invention Figure 2 .

[0018] In the figure: 1. Cabinet body; 2. Heat sink; 3. Cabinet door; 31. Control button; 32. Buckle; 4. Suspension plate; 41. Positioning tube; 42. Fixing bolt tube; 43. Fastening nail; 5. Inner back plate; 51. Fixing frame; 52. Mounting hole; 6. Heat sink; 7. Terminal board; 8. Slot. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0020] Example 1: Reference Figure 1-7 As shown: An electrical cabinet with a fire-retardant layer includes a cabinet body 1. The cabinet body 1 adopts a frame structure and is composed of columns and beams. The columns and beams are welded and sealed with metal plates. Fire-retardant panels are installed inside and outside the side walls of the cabinet body 1. An opening is provided on the back of the cabinet body 1, and an inner back panel 5 is installed at the opening. Circular openings are evenly opened on the surface of the inner back panel 5, and heat dissipation tubes 6 are installed in the circular openings. The heat dissipation tubes 6 are composed of a honeycomb structure cylinder. The inner back panel 5 and the heat dissipation tubes 6 are both made of fire-retardant material. A suspension plate 4 is installed at the other end of the heat dissipation tube 6. Positioning tubes 41 are installed at the four corners of the suspension plate 4. The suspension plate 4 is installed on the wall through the positioning tubes 41. A gap for air to pass through is left between the suspension plate 4 and the wall.

[0021] In this embodiment, fire-retardant panels are arranged inside and outside the cabinet 1. The internal fire-retardant panels can isolate the electrical equipment from the cabinet 1 to prevent the flame and heat from being directly transferred to the cabinet 1 when a fire occurs. The external fire-retardant panels can resist the invasion of the cabinet 1 by external fire sources and protect the safety of the internal electrical equipment. The fire-retardant panels are made of magnesium oxide boards or calcium silicate boards, etc., which have good fire-proof properties, are non-flammable and can effectively block heat transfer. At the same time, they also have a certain mechanical strength and can withstand a certain amount of pressure and impact. The fire-retardant panels are scientifically bonded according to the characteristics of different materials. Before bonding, the cabinet 1 and the fire-retardant layer are cleaned and polished to ensure that the surface is flat and oil-free, so as to increase the bonding area and bonding strength. In addition, the fire-retardant coating is applied to the surface of the cabinet 1 to further achieve the fire-retardant function.

[0022] In order to avoid the problem of heat transfer between the back panel of the cabinet 1 and the wall, the back panel is connected with a suspension panel 4 and an inner back panel 5 that are far away from each other. The suspension panel 4 and the inner back panel 5 are connected to each other through a heat dissipation tube 6. The inner back panel 5 is installed on the inner wall of the cabinet 1 and is made of fire-retardant material. It can directly block the spread of fire. The suspension panel 4 is installed on the wall and is separated from the interior of the cabinet 1 by a certain distance. No fire-retardant is required. There is enough space between the suspension panel 4 and the inner back panel 5. The heat is dissipated outward from the inner back panel 5. Most of the heat is directly dissipated in the external space, and only a small amount of heat is transferred to the suspension panel 4 through the heat dissipation tube 6.

[0023] Since the heat dissipation tube 6 is supported by a material with strong thermal conductivity and the suspension plate 4 and the inner back plate 5 are open, the outer surface area of the heat dissipation tube 6 is large, which is conducive to the timely dissipation of heat during the transfer process, reducing the heat of the wall, and effectively preventing the wall from spontaneously combusting due to high temperature. Before spontaneous combustion occurs in the cabinet 1 due to high temperature, cold air directly enters the interior of the cabinet 1 through the heat dissipation tube 6, timely reducing the internal temperature of the cabinet 1, and effectively preventing it from reaching the ignition point. If a fire occurs, since the heat dissipation tube 6 is made of fire-retardant material and its internal channel is deep, it is difficult for the flame to pass through the narrow and long flame-retardant channel in the heat dissipation tube 6, and it can also prevent the fire inside the cabinet 1 from spreading to the outside.

[0024] Example 2: According to Figure 1 、 Figure 2 and Figure 4 As shown, a fixing bolt barrel 42 is provided at one end of the positioning barrel 41, and a fastening nail 43 is provided at the other end of the positioning barrel 41, securing the positioning barrel 41 to the wall. The inner wall of the positioning barrel 41 is provided with a threaded internal thread that mates with the fastening nail 43, which is threadedly connected to the positioning barrel 41. One end of the fixing bolt barrel 42 is cut to form a stud, which is then inserted into the positioning barrel 41 through the stud cavity.

[0025] In this embodiment, in order to install the suspension plate 4 in the air on the wall and leave a certain gap between the suspension plate 4 and the wall, a fixing bolt cylinder 42 is installed at one end of the positioning cylinder 41, and the fixing bolt cylinder 42 is driven into the wall through an expansion screw. A column head that is adapted to the shape of the positioning cylinder 41 is also provided on the fixing bolt cylinder 42, so that the fixing bolt cylinder 42 and the positioning cylinder 41 can be docked to quickly install the electrical cabinet, and a fastening nail 43 is installed at the other end of the positioning cylinder 41, and the fastening nail 43 is inserted into the positioning cylinder 41. Then, the fastening nail 43 is screwed into the fixing bolt cylinder 42, so that the positioning cylinder 41 and the fastening nail 43 can be connected, thereby forming a quick disassembly.

[0026] Example 3: According to Figure 1 、 Figure 3 and Figure 5 As shown, the outer side of the cabinet 1 is mounted with heat sinks 2, and the front of the cabinet 1 is movably connected to a cabinet door 3 via a hinge. A control button 31 is provided at the center of the cabinet door 3, and a latch 32 is provided on one side of the cabinet door 3, which movably engages with the cabinet 1 via the latch 32. A slot 8 is fixedly connected to the inner side wall of the cabinet 1, and a terminal board 7 is slidably connected to the inner side wall of the slot 8. A fixed frame 51 is fixedly connected to the outer side wall of the inner back panel 5, and mounting holes 52 are evenly spaced on the surface of the fixed frame 51.

[0027] In this embodiment, heat sinks 2 are provided on both sides of the cabinet 1. The heat sink 2 is installed with a fireproof heat dissipation grille through special heat dissipation holes, which can ensure air circulation and prevent flames and heat from spreading through the holes. A freely openable cabinet door 3 is installed on the front of the cabinet 1. Several display lights showing the power status of the cabinet 1 are installed on the surface of the cabinet door 3. The control button 31 is used to control the on and off of the display light. Two clips 32 are installed on one side of the cabinet door 3. The outer end of the clip 32 is connected to the knob. After rotating ninety degrees, the clip 32 can be staggered with the cabinet 1, so that the cabinet 1 and the cabinet door 3 can be opened normally. When reversed ninety degrees, the clip 32 blocks the inner edge of the cabinet 1, forming a fixation of the cabinet 1 and the cabinet door 3.

[0028] Example 4: The electrical cabinet also adopts four-fold protection of fire prevention design of the circuit system, ventilation system, intelligent monitoring system and grounding system to avoid fire.

[0029] Fireproof design of the circuit system: Fireproof cables and wires are used. The outer layer of these cables and wires has fire-retardant properties, which can prevent the spread of flames to a certain extent and protect the safety of the circuit system. Fireproof sockets and switches are installed. These sockets and switches are made of fire-resistant materials and can effectively prevent fires caused by electrical faults. Overcurrent protection devices and short-circuit protection devices are installed in the circuit system. When overcurrent or short circuit occurs in the circuit, these protection devices can immediately cut off the power supply and prevent the occurrence of fire.

[0030] Optimization of the ventilation system: Ventilation openings are provided at the top and bottom of cabinet 1, and fire-resistant ventilation dampers are installed at the vents. In the event of a fire, the fire-resistant ventilation dampers will automatically close to prevent flames and smoke from entering cabinet 1. Ventilation fans are installed to accelerate air circulation inside cabinet 1, reduce the temperature, and improve the operating efficiency of electrical equipment.

[0031] Application of an intelligent monitoring system: Temperature and smoke sensors are installed to monitor the temperature and smoke concentration inside cabinet 1 in real time. When the temperature or smoke concentration exceeds the set value, the sensor will promptly issue an alarm, prompting staff to take appropriate measures. With the intelligent monitoring system, staff can remotely monitor the operation of cabinet 1 via mobile phone or computer, identifying and addressing any problems promptly.

[0032] Improve the grounding system: Install a grounding device to ground the outer casing of electrical equipment. If a leakage occurs, the current flows through the grounding device to the earth, preventing electric shock and fire. Regularly inspect and maintain the grounding system to ensure its reliability.

[0033] The usage and working principle of this device: The cabinet 1 adopts a frame structure, and fire-retardant panels are installed on the inside and outside of its side walls. Double fire protection is achieved through surface cleaning and polishing, bonding technology and fire-retardant coating on the surface of the cabinet 1. The internal panel isolates the electrical equipment from the cabinet 1, blocking the direct transmission of flame heat, and the external panel resists external fire sources; the inner back panel 5 at the opening on the back of the cabinet 1 is made of fire-retardant material, and the circular opening on the surface is equipped with a heat dissipation tube 6, which is connected to the suspension plate 4 through the heat dissipation tube 6. The suspension plate 4 is fixed to the wall through the positioning tube 41 and leaves an air gap with the wall. The heat dissipation tube 6 adopts a honeycomb structure cylinder with strong thermal conductivity and a large surface area. The heat in the cabinet 1 is dissipated outward through the inner back panel 5 and the heat dissipation tube 6, most of which is dissipated to the outside and a small amount is dissipated to the outside. The heat is transmitted to the suspension plate 4, and the cold air can enter the cabinet 1 through the heat dissipation tube 6 to cool down. In case of fire, the narrow flame-retardant channel in the heat dissipation tube 6 can prevent the flame from spreading; one end of the positioning tube 41 passes through a fixing bolt tube 42 with a column head, and the other end is connected by a fastening nail 43 with a threaded connection to achieve quick installation and disassembly; the heat sink 2 on the outside of the cabinet 1 assists in heat dissipation, the front cabinet door 3 is opened and closed by hinges and buckles 32, the inner slot 8 is slidably connected to the terminal board 7, and the outer fixed frame 51 of the inner back plate 5 is provided with a mounting hole 52 for equipment installation.

[0034] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An electrical cabinet with a fire retardant layer, comprising a cabinet body (1), wherein the cabinet body (1) adopts a frame structure and is composed of columns and beams, and the columns and beams are sealed by welding metal plates, and the characteristics are: Fireproof and flame-retardant panels are installed inside and outside the side walls of the cabinet (1). An opening is provided on the back of the cabinet (1), and an inner back panel (5) is installed at the opening. Circular openings are evenly opened on the surface of the inner back panel (5), and heat dissipation tubes (6) are installed in the circular openings. The heat dissipation tubes (6) are composed of a honeycomb-shaped cylinder. The inner back panel (5) and the heat dissipation tubes (6) are made of fireproof and flame-retardant materials. A suspension plate (4) is installed at the other end of the heat dissipation tube (6). Positioning tubes (41) are installed at the four corners of the suspension plate (4). The suspension plate (4) is installed on the wall through the positioning tubes (41). A gap for air to pass through is left between the suspension plate (4) and the wall.

2. The electrical cabinet with a fire retardant layer according to claim 1, characterized in that: One end of the positioning tube (41) is provided with a fixing bolt tube (42), and the other end of the positioning tube (41) is provided with a fastening nail (43), and the positioning tube (41) is fixedly connected to the wall.

3. The electrical cabinet with a fire retardant layer according to claim 2, characterized in that: The inner side wall of the positioning cylinder (41) is provided with a threaded internal thread that cooperates with the fastening nail (43), and the fastening nail (43) is threadedly connected to the positioning cylinder (41).

4. The electrical cabinet with a fire retardant layer according to claim 3, characterized in that: One end of the fixing bolt cylinder (42) is cut to form a column head, and the fixing bolt cylinder (42) is inside the positioning cylinder (41) through the column head inner cavity.

5. The electrical cabinet with a fire retardant layer according to claim 1, characterized in that: Heat sinks (2) are installed on the outer sides of the cabinet body (1), and a cabinet door (3) is movably connected to the front side of the cabinet body (1) via a hinge.

6. The electrical cabinet with a fire retardant layer according to claim 5, characterized in that: A control button (31) is provided at the center of the cabinet door (3), and a buckle (32) is provided on one side of the cabinet door (3). The cabinet door (3) is movably connected to the cabinet body (1) via the buckle (32).

7. The electrical cabinet with a fire retardant layer according to claim 1, characterized in that: The inner side wall of the cabinet (1) is fixedly connected with a card slot (8), and the inner side wall of the card slot (8) is slidably connected with a terminal board (7).

8. The electrical cabinet with a fire retardant layer according to claim 1, characterized in that: The outer side wall of the inner back plate (5) is fixedly connected to a fixed frame (51), and the surface of the fixed frame (51) is provided with mounting holes (52) at equal intervals.

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