Fireproof and explosion-proof distribution box for emergency response to disaster situation

Abstract

The invention discloses a fire-proof and explosion-proof distribution box for emergency response to disasters, which comprises a distribution box body, an explosion-proof cavity in the distribution box body is divided into a plurality of compartments by a plurality of partition plates, a U-shaped mounting seat is fixedly connected in each compartment, and a lower cavity of each U-shaped mounting seat is communicated with the outside of the corresponding compartment. The U-shaped mounting seat, the distribution box body and the partition plate define a closed compartment; a pressure relief channel, fire extinguishing nozzles, a flame sensor and a pressure sensor are arranged in the compartment, the fire extinguishing nozzles, the flame sensor and the pressure sensor are all connected with the control system, and the multiple fire extinguishing nozzles are installed on the periphery of the interior of the compartment; when the power distribution box is in use, the fire can be extinguished in time even if the fire breaks out in the compartment, and the generated high pressure can be released in time through the pressure release channel, so that the pressure is prevented from being excessively accumulated in the power distribution box body, and components in other compartments are protected from being affected and damaged.

Description

Technical Field

[0001] The present invention relates to the technical field of distribution boxes, and specifically to a fireproof and explosion-proof distribution box for emergency response to disasters. Background Art

[0002] A distribution box is an electrical equipment, which has the characteristics of small volume, simple installation, special technical performance, fixed position, unique configuration function, not restricted by the site, relatively common application, stable and reliable operation, high space utilization rate, less land occupation and environmental protection effect; it requires switchgear, measuring instruments, protective electrical appliances and auxiliary equipment to be assembled in a closed or semi-closed metal cabinet or screen to form a low-voltage distribution box; the distribution box can reasonably distribute electric energy, facilitate the opening and closing operation of the circuit, has a high safety protection level, and can intuitively display the conduction state of the circuit.

[0003] Explosion-proof distribution boxes are often used in production sites where there is a mixture of explosive gases or a relatively high concentration of combustible dust in the air. Such sites are extremely prone to disasters, and explosion-proof distribution boxes will inevitably generate electric sparks during operation; when a component in the explosion-proof distribution box, such as a circuit breaker, catches fire, the existing structure is difficult to prevent other surrounding components from being damaged by the fire, resulting in damage to all the components inside the entire distribution box and causing unnecessary economic losses. Summary of the Invention

[0004] To solve the above technical problems, the present invention provides a fireproof and explosion-proof distribution box for emergency response to disasters to meet the needs of actual production.

[0005] The technical solution of the present invention is: a fireproof and explosion-proof distribution box for emergency response to disasters, including a distribution box body. An explosion-proof chamber and an increased-safety chamber are provided inside the distribution box body. The explosion-proof chamber is divided into several compartments by a number of partition plates. A U-shaped mounting seat is fixedly connected inside each compartment. The lower cavity of the U-shaped mounting seat communicates with the outside of the compartment. The U-shaped mounting seat, the distribution box body, and the partition plates enclose the closed compartment; a pressure relief channel, a fire sprinkler, a flame sensor, and a pressure sensor are provided inside the compartment. The fire sprinkler, the flame sensor, and the pressure sensor are all connected to a control system. There are several fire sprinklers and they are installed around the inside of the compartment.

[0006] Further, a wire hole is provided at the side end of the U-shaped mounting seat. The power supply wires of the components installed at the upper end of the U-shaped mounting seat pass through the wire hole and the lower cavity of the U-shaped mounting seat and are connected to the components inside the increased-safety chamber.

[0007] Further, the U-shaped mounting seat is made of a heat-conducting metal material. One end of a heat pipe is connected to the inner wall of the lower cavity of the U-shaped mounting seat, and the other end of the heat pipe penetrates through the distribution box body and is provided with a heat sink.

[0008] Further, the heat sink is a paraffin phase change material, and the heat sink has a porous structure.

[0009] Further, the fire extinguishing nozzle is connected to the aerosol storage tank through a pipeline. The pipeline includes a main pipe and branch pipes. The main pipe is connected to the aerosol storage tank, and the main pipe is respectively connected to a plurality of the fire extinguishing nozzles through a plurality of branch pipes. Solenoid valves connected to the control system are provided on both the main pipe and the fire extinguishing nozzles. One main pipe corresponds to one compartment.

[0010] Further, the pressure relief channel includes a pressure relief port and a spiral channel. A solenoid valve connected to the control system is provided on the pressure relief port, and the spiral channel is communicated with the pressure relief port.

[0011] Furthermore, a plurality of buffer plates are provided inside the spiral channel, and adjacent two buffer plates are arranged staggeredly.

[0012] Furthermore, a buffer cavity is provided between the pressure relief port and the spiral channel, and the cross-sectional area of the buffer cavity is respectively larger than the cross-sectional areas of the pressure relief port and the spiral channel.

[0013] Further, the main body of the distribution box is a carbon fiber reinforced composite material; a steel plate explosion-proof layer is provided inside the main body of the distribution box, and a nano fire-proof layer is provided outside.

[0014] Further, the main body of the distribution box includes a box body, an explosion-proof cavity cover and an increased safety cavity cover, and a groove for cooperating with the partition board is provided inside the explosion-proof cavity cover.

[0015] Compared with the prior art, the advantages of the present invention are as follows: In the present invention, the explosion-proof cavity inside the main body of the distribution box is divided into a plurality of compartments by a plurality of partition boards, and the U-shaped mounting seat, the main body of the distribution box and the partition board enclose a sealed compartment. A pressure relief channel, a fire extinguishing nozzle and a flame sensor are provided in the compartment. Even if a fire breaks out in the compartment, it will be extinguished in time, and the high pressure generated therein will also be released in time through the pressure relief channel, avoiding excessive accumulation of pressure inside the main body of the distribution box, thereby protecting the components in other compartments from being affected and damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

[0017] Figure 1Schematic diagram of the overall structure of the present invention; Figure 2 Schematic diagram of the structure of the pressure relief channel in the present invention; Figure 3 Cross-sectional view of a part of the structure of the present invention.

[0018] Wherein: 1, distribution box body; 2, flameproof cavity; 3, increased safety cavity; 4, partition board; 5, U-shaped mounting seat; 6, aerosol storage tank; 7, pressure relief port; 8, buffer port; 9, tension spring; 10, buffer cavity; 11, spiral channel; 12, buffer plate; 13, flameproof cavity cover; 14, fire extinguishing nozzle; 15, components; 16, lower cavity; 17, wire hole. Detailed implementation manners

[0019] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope protected by the present invention.

[0020] The following will describe the detailed implementation manners of the present invention in conjunction with the drawings: As Figures 1 to 3 shown, a fire and explosion-proof distribution box for emergency response to disasters includes a distribution box body 1. Inside the distribution box body 1, there are a flameproof cavity 2 and an increased safety cavity 3. Components 15 that may generate sparks, arcs or high temperatures during normal operation are usually installed in the flameproof cavity 2. For example, main circuit control components 15 such as circuit breakers, contactors, and relays are generally installed in the flameproof cavity 2; Components 15 in the increased safety cavity 3 are mainly those with higher safety requirements but that do not directly generate sparks or high temperatures. For example, some components 15 of the auxiliary control circuit (such as indicator lights, auxiliary relays, etc.) can be installed in the increased safety cavity 3; The flameproof cavity 2 is divided into several compartments by a number of partition boards 4, and the partition boards 4 are fire and explosion-proof materials. For example, the partition boards 4 are made of high-strength fire and explosion-proof glass fiber composite materials; Inside each compartment, a U-shaped mounting seat 5 is fixedly connected. The lower cavity 16 of the U-shaped mounting seat 5 communicates with the outside of the compartment. One end of a heat pipe is connected to the inner wall of the lower cavity 16 of the U-shaped mounting seat 5, and the other end of the heat pipe penetrates the distribution box body 1 and is provided with a heat sink; The U-shaped mounting seat 5 is a heat-conducting metal material. For example, aluminum or copper-nickel alloy, etc. all have good heat conductivity and high-temperature resistance, enabling the components 15 mounted on the U-shaped mounting seat 5 to dissipate heat quickly. Moreover, the heat sink is a paraffin phase change material, and the heat sink has a porous structure, increasing the contact area with the paraffin, further improving the heat dissipation efficiency, and enabling the components 15 sealed inside the distribution box body 1 to operate normally; Among them, the U-shaped mounting base 5, the distribution box body 1, and the partition 4 enclose a sealed compartment; even if the components 15 in one compartment catch fire, the components 15 in other compartments will not be damaged. The two ends of the U-shaped mounting base 5 are fixedly connected to the partition 4, and the lower end is fixedly connected to the distribution box body 1. Moreover, the components 15 are connected to the U-shaped mounting base 5 in a relatively sealed manner such as by bolts, and the bolts do not penetrate the U-shaped mounting base 5. There are a pressure relief channel, a fire sprinkler 14, a flame sensor, and a pressure sensor in the compartment. The fire sprinkler 14, the flame sensor, and the pressure sensor are all connected to the control system. There are several fire sprinklers 14 installed around the inside of the compartment. That is, when the flame sensor detects that the components 15 in the compartment catch fire, the fire sprinkler 14 immediately extinguishes the fire. The high pressure generated therein, the pressure generated by an explosion, or the excessive concentration of harmful gases are released through the pressure relief channel to avoid excessive accumulation of pressure inside the compartment or the distribution box body 1, thereby protecting the components 15 in other compartments from being damaged. A wire hole 17 is provided at the side end of the U-shaped mounting base 5. The power supply wires of the components 15 installed at the upper end of the U-shaped mounting base 5 pass through the wire hole 17 and the lower cavity 16 of the U-shaped mounting base 5 to be connected to the components 15 in the increased safety cavity 3. For example, the coils of the main circuit control components 15 (such as contactors and relays) in the explosion-proof cavity 2 are connected to the control components 15 such as buttons and switches in the increased safety cavity 3 through control signals. Different from the conventional wire hole 17 directly provided on the U-shaped mounting base 5 at the bottom end of the component 15, the wire hole 17 of the present invention is provided at the side end of the U-shaped mounting base 5. In this way, when the components 15 installed on the U-shaped mounting base 5 catch fire or explode, it can be avoided that the components 15 outside the compartment are directly affected. That is, flames and the like will not extend to the outside of the compartment through the lower cavity 16 of the U-shaped mounting base 5 immediately, avoiding damage to the components 15 in other compartments. Moreover, a sealing rubber sleeve is provided between the wire hole 17 and the power supply wire to enhance the sealing performance of the compartment. Moreover, after the power supply wire comes out of the lower cavity 16 of the U-shaped mounting base 5, it has to be bent before being connected to the components 15 in the increased safety cavity 3 to avoid direct connection.

[0021] The fire extinguishing nozzle 14 is connected to the aerosol storage tank 6 through a pipeline. The pipeline includes a main pipe and branch pipes. The main pipe is connected to the aerosol storage tank 6, and the main pipe is connected to several fire extinguishing nozzles 14 through several branch pipes respectively. Solenoid valves connected to the control system are provided on both the main pipe and the fire extinguishing nozzle 14. One main pipe corresponds to one compartment. Among them, the aerosol storage tank 6 is installed in the explosion-proof chamber 2 outside the compartment. The main pipe is a T-shaped pipe. The vertical pipe of the T-shaped pipe is connected to the aerosol storage tank 6, and the horizontal pipe of the T-shaped pipe is connected to multiple branch pipes. The partition 4 and the interior of the distribution box body 1 are provided with cavities. The vertical pipe of the T-shaped pipe extends into the cavity, and the branch pipes communicate with the horizontal pipe inside the cavity and are routed inside the cavity and then connected to the fire extinguishing nozzles 14 installed on the inner wall of the partition 4. The inner walls of the partition 4 corresponding to the four end faces of the U-shaped mounting seat 5 or the inner wall of the distribution box body 1 are the surroundings of the compartment. Therefore, at least four fire extinguishing nozzles 14 in one compartment are arranged facing the components 15 on the U-shaped mounting seat 5. In this way, fire extinguishing operations can be carried out around the components 15, quickly extinguishing the fire and playing a role in emergency response to disasters. Moreover, the branch pipes connecting the fire extinguishing nozzles 14 are routed inside the cavity, avoiding damage to the branch pipes by flames and the like. The pressure relief channel includes a pressure relief port 7 and a spiral channel 11. A solenoid valve connected to the control system is provided on the pressure relief port 7, and the spiral channel 11 is communicated with the pressure relief port 7. The pressure relief port 7 is arranged at the inner bottom end of the distribution box body 1. When the pressure sensor or gas concentration sensor installed inside the compartment detects that the internal pressure value reaches a certain threshold or the concentration of flammable and explosive gases inside, such as hydrogen, methane, etc. exceeds the safe range, the solenoid valve opens so that the pressure or gas is discharged and released, avoiding safety accidents. The setting of the spiral channel 11 increases the length of the pressure or gas release path, enabling the pressure or gas to be further buffered during the release process. More preferably, several buffer plates 12 are provided inside the spiral channel 11, and adjacent two buffer plates 12 are arranged staggeredly, so that the pressure or gas is further buffered during the release process. Furthermore, a buffer chamber 10 is provided between the pressure relief port 7 and the spiral channel 11. The cross-sectional area of the buffer chamber 10 is larger than the cross-sectional areas of the pressure relief port 7 and the spiral channel 11 respectively. Such a design enables the pressure or gas inside the compartment to be further buffered before being released to the outside, avoiding injury to people. Additionally, a buffer port 8 is provided at the inner bottom end of the distribution box body 1 or on the partition 4. The buffer port 8 is communicated with the buffer chamber 10. A baffle is provided on the buffer port 8, and the baffle is arranged inside the buffer chamber 10. The baffle is connected to the inner bottom end of the distribution box body 1 or the tension spring 9 of the partition 4. Under the action of the tension spring 9, the baffle usually seals the buffer port 8. When an explosion occurs in the compartment, the powerful air pressure blows open the baffle, enabling a part of the gas to be discharged from the buffer port 8 and reducing the air pressure inside the compartment, avoiding damage to the partition 4 and the like caused by high pressure and the like when the pressure relief port 7 fails to open in time at the moment of explosion.

[0022] The distribution box body 1 is made of carbon fiber reinforced composite material, which has good structural stability at high temperatures. Moreover, the carbon fiber has a low thermal conductivity, which can effectively reduce the heat transfer speed. A steel plate explosion-proof layer is provided inside the distribution box body 1 to prevent the explosion inside the distribution box body 1 from hurting people. A nano fire-proof layer is provided outside. The nano fire-proof layer is nano fire-proof paint, which includes flame retardant, waterproof, mildew-proof, acid and alkali resistant, non-toxic and odorless, and can decompose and eliminate harmful gases in the air. It can quickly expand to form a dense foam layer when encountering fire, isolate oxygen, and reflect heat at the same time, preventing the fire outside the distribution box body 1 from affecting the internal components 15.

[0023] The distribution box body 1 includes a box body, an explosion-proof cavity cover 13 and an increased safety cavity cover. A groove for fitting the partition plate 4 is provided inside the explosion-proof cavity cover 13. The box body is detachably and hermetically connected to the explosion-proof cavity cover 13 and the increased safety cavity cover through bolts and gaskets, etc. This is the prior art and will not be elaborated here. A groove for fitting the partition plate 4 is provided inside the explosion-proof cavity cover 13, and a gasket is provided on the contact surface between the partition plate 4 and the groove, which not only enhances the sealing performance but also enhances the stability of the installation of the partition plate 4.

[0024] Working principle: When the components 15 in the compartment are operating normally, when the pressure sensor or gas concentration sensor detects that the pressure value inside reaches a certain threshold or the concentration of flammable and explosive gases inside exceeds the safe range, the solenoid valve opens to discharge and release the pressure or gas, preventing safety accidents from occurring. When the flame sensor detects that the components 15 in the compartment catch fire or explode, at this time, the solenoid valve of the fire extinguishing nozzle 14 is controlled to open by the control system, and the fire extinguishing nozzle 14 extinguishes the fire on the components 15. After the fire is extinguished, when the pressure sensor or gas concentration sensor detects that the pressure value inside reaches a certain threshold or the concentration of the gas inside exceeds the safe range, the solenoid valve opens to discharge and release the pressure or gas, and at the same time, it also discharges the harmful gases remaining after the fire extinguishing. It should be noted that when an element is referred to as "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "upper", "lower", "left", "right", "front", "rear" and similar expressions used in this article are only for the purpose of illustration.

[0025] The above are only the preferred embodiments of the present invention and do not impose any formal limitations on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments by using the above-disclosed technical content without departing from the technical solution of the present invention. However, as long as it does not depart from the technical solution content of the present invention, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A fireproof and explosion-proof distribution box for emergency response to disasters, comprising a distribution box body (1), characterized in that: A flameproof chamber (2) and an increased safety chamber (3) are provided inside a distribution box body (1); the flameproof chamber (2) is divided into a plurality of compartments by a plurality of partitions (4); a U-shaped mounting seat (5) is fixedly connected inside each compartment; a lower cavity (16) of the U-shaped mounting seat (5) is communicated with the outside of the compartment; the U-shaped mounting seat (5), the distribution box body (1), and the partitions (4) form a closed compartment; a pressure relief channel, a fire extinguishing nozzle (14), a flame sensor, and a pressure sensor are provided inside the compartment; the fire extinguishing nozzle (14), the flame sensor, and the pressure sensor are all connected to a control system; and a plurality of fire extinguishing nozzles (14) are provided and are installed around the inside of the compartment.

2. The fireproof and explosion-proof distribution box for emergency response to disasters according to claim 1 is characterized by: A wire hole (17) is provided at a side end of the U-shaped mounting seat (5), and a power line of a component (15) mounted on the upper end of the U-shaped mounting seat (5) is connected to the component in the increased safety cavity (3) through the wire hole (17) and the lower cavity (16) of the U-shaped mounting seat (5).

3. The fireproof and explosion-proof distribution box for emergency response to disasters according to claim 1 is characterized by: The U-shaped mounting seat (5) is made of a heat-conducting metal material; the inner wall of the lower cavity (16) of the U-shaped mounting seat (5) is connected to one end of a heat pipe; the other end of the heat pipe passes through the distribution box body (1) and is provided with a heat sink.

4. The fireproof and explosion-proof distribution box for emergency response to disasters according to claim 3 is characterized by: The heat sink is made of paraffin phase change material and has a porous structure.

5. The fireproof and explosion-proof distribution box for emergency response to disasters according to claim 1 is characterized by: The fire extinguishing nozzle (14) is connected to the aerosol storage tank (6) via a pipeline, the pipeline comprising a main pipe and a branch pipe, the main pipe is connected to the aerosol storage tank (6), the main pipe is respectively connected to a plurality of fire extinguishing nozzles (14) via a plurality of branch pipes, the main pipe and the fire extinguishing nozzle (14) are both provided with a solenoid valve connected to a control system, and one main pipe corresponds to one compartment.

6. The fireproof and explosion-proof distribution box for emergency response to disasters according to claim 1, characterized in that: The pressure relief channel comprises a pressure relief port (7) and a spiral channel (11); a solenoid valve connected to a control system is provided on the pressure relief port (7); and the spiral channel (11) is in communication with the pressure relief port (7).

7. The fireproof and explosion-proof distribution box for emergency response to disasters according to claim 6, characterized in that: A plurality of buffer plates (12) are arranged inside the spiral channel (11), and two adjacent buffer plates (12) are arranged staggered with each other.

8. The fireproof and explosion-proof distribution box for emergency response to disasters according to claim 6, characterized in that: A buffer chamber (10) is provided between the pressure relief port (7) and the spiral channel (11); the cross-sectional area of ​​the buffer chamber (10) is larger than the cross-sectional areas of the pressure relief port (7) and the spiral channel (11).

9. The fireproof and explosion-proof distribution box for emergency response to disasters according to claim 1, characterized in that: The distribution box body (1) is made of carbon fiber reinforced composite material; a steel plate explosion-proof layer is provided inside the distribution box body (1), and a nano fireproof layer is provided outside.

10. The fireproof and explosion-proof distribution box for emergency response to disasters according to claim 1, characterized in that: The distribution box body (1) comprises a box body, a flameproof cavity cover (13) and an increased safety cavity cover, and a groove matching the partition plate (4) is provided inside the flameproof cavity cover (13).

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