Electrical connector with fire extinguishing function

Abstract

The utility model belongs to the technical field of electrical safety, discloses an electrical connector with a fire extinguishing function, and adopts the specific technical scheme that the electrical connector comprises a fixed bracket and a junction box, the junction box is arranged on the fixed bracket, a wiring board is arranged in the junction box, a dry powder storage tank is arranged in the junction box, and a dry powder extinguishing agent and pressure nitrogen are stored in the dry powder storage tank; the spray head is communicated with the interior of the dry powder storage tank through an air spraying pipe, the spray head and the air spraying pipe are separated through a metal fusible piece, the pressure switch is communicated with the spray head through a pressure pipeline, and the pressure switch is sequentially connected with the fire-fighting input module and the fire-fighting controller through a fire-fighting cable. The metal fusible piece is fused, dry powder in the dry powder storage tank is sprayed to the electric connection position through the spray head, fire is extinguished in time, nitrogen pressure triggers the pressure switch, an alarm signal is accurately sent to a fire control room at the first time through the alarm bus, troubleshooting and maintenance are conducted in time, and safe operation of the whole line is recovered as soon as possible.

Description

Technical Field

[0001] The utility model belongs to the technical field of electrical safety, and in particular relates to an electrical connector with fire extinguishing and alarm functions. Background Art

[0002] Electrical junction boxes are a commonly used building accessory in buildings. Due to unreasonable design of junction boxes, aging of internal wiring in junction boxes, poor contact between power supply cables and insulation piercing wire clamps, etc., arc discharges ignite flammable and combustible materials such as cable sheaths, and then spread into more serious fires, causing casualties. Since non-fire cables are easy to burn, most electrical fires are caused by improper cable connection contact and arc discharge igniting combustibles when the setting value of the electrical cable protection switch is correctly selected. Since most current fire alarms are judged by the smoke concentration value or temperature value of the burning material, when the smoke concentration value or temperature value received by the fire alarm exceeds the preset value, the fire may be difficult to control at this time, which may easily cause more serious consequences. Therefore, in order to ensure the safety of life and property and prevent such accidents from happening at the source, an electrical connector with fire extinguishing and fire alarm functions is urgently needed. Utility Model Content

[0003] In order to solve the technical problems existing in the prior art, the utility model provides an electrical connector with fire extinguishing and alarm functions, which can extinguish the fire point from the source in time and send out an alarm signal in time.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: an electrical connector with a fire extinguishing function, comprising a fixed bracket, a first connecting through hole is opened at one end of the fixed bracket, and a second connecting through hole is opened at the other end of the fixed bracket, and the fixed bracket is positioned by screws passing through the first connecting through hole and the second connecting through hole.

[0005] The device also includes a junction box, which is mounted on a fixed bracket, a junction board is arranged in the junction box, a plurality of electrical connectors are installed on the junction board, a dry powder storage tank is arranged in the junction box, and the dry powder storage tank and the junction board are arranged in different areas. The dry powder storage tank stores dry powder fire extinguishing agent, and the dry powder storage tank is filled with pressurized nitrogen.

[0006] The device also includes a nozzle, which is connected to the interior of the dry powder storage tank through an injection pipe, and the nozzle and the injection pipe are separated by a metal fusible piece. The outlet of the nozzle is arranged toward multiple electrical connectors, and the dry powder in the dry powder storage tank directly acts on the electrical connectors after being sprayed out.

[0007] The device also includes a pressure switch, which is connected to the sprinkler head through a pressure pipe. The pressure switch is connected to the fire input module and the fire controller in sequence through a fire cable. After receiving the pressure alarm signal, the pressure switch transmits the alarm signal to the fire control system.

[0008] The pressure value of the pressurized nitrogen in the dry powder storage tank is 1.2MPa.

[0009] A wire threading hole is opened on the junction box, the pressure pipe passes through the wire threading hole, and the wire threading hole is sealed with fireproof mud, so that a closed space is formed inside the junction box.

[0010] Preferably, the junction box has a length of 86 mm, a width of 86 mm, and a height of 50 mm.

[0011] Compared with the prior art, the utility model has the following specific beneficial effects: the utility model arranges a pressure dry powder storage tank at the electrical connection of the junction box, and utilizes the closedness of the box body of the junction box. When a fire point is generated at the electrical connection in the junction box, the temperature in the junction box rises and exceeds the preset temperature, the metal fusible piece melts, and the dry powder in the dry powder storage tank is sprayed by the nozzle at the electrical connection, so as to extinguish the fire in time, avoid the extension of the fire, and eliminate the fire point at the source at the first time. In addition, during the powder spraying process, the nitrogen pressure triggers the pressure switch, and the alarm signal will be accurately sent to the fire control room through the alarm bus at the first time, so as to conduct timely investigation and maintenance and restore the safe operation of the entire line as soon as possible. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model.

[0013] Figure 2 This is a layout diagram of the internal connection relationship of the utility model.

[0014] In the figure, 1 is a fixed bracket, 11 is a first connecting through hole, 12 is a second connecting through hole, 2 is a junction box, 3 is a junction board, 31 is an electrical connector, 4 is a dry powder storage tank, 41 is a nozzle, 42 is a jet pipe, 5 is a pressure switch, 6 is a pressure pipe, 7 is a fire input module, 8 is a fire controller, and 9 is a threading hole. DETAILED DESCRIPTION

[0015] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0016] like Figure 1-2 As shown, the electrical connector with fire extinguishing function includes a fixing bracket 1, a first connecting through hole 11 is opened at one end of the fixing bracket 1, and a second connecting through hole 12 is opened at the other end of the fixing bracket 1. The apertures of the first connecting through hole 11 and the second connecting through hole 12 are 10 mm. The fixing bracket 1 is positioned on the building by screws passing through the corresponding first connecting through hole 11 and the second connecting through hole 12.

[0017] The device also includes a junction box 2, which is 86 mm long, 86 mm wide, and 50 mm high. The junction box 2 is mounted on a fixed bracket 1. A junction board 3 is arranged in the junction box 2, and a plurality of electrical connectors 31 are mounted on the junction board 3. A dry powder storage tank 4 is installed in the junction box 2, and the dry powder storage tank 4 and the junction board 3 are arranged in different areas. Dry powder fire extinguishing agent is stored in the dry powder storage tank 4, and pressurized nitrogen is filled in the dry powder storage tank 4. The pressure value of the pressurized nitrogen in the dry powder storage tank 4 is 1.2 MPa. The capacity of the dry powder fire extinguishing agent is calculated according to the formula 3.2.2 in the "Design Specification for Dry Powder Fire Extinguishing System" GB50347-2004. The 86 junction box commonly used in construction is used as a template. The principles and calculation methods of the socket and the distribution box are the same. Combined with the size of the dry powder storage tank 4, the weight of the dry powder fire extinguishing agent is 60g, and the remaining tank space is used to store driving nitrogen.

[0018] The device also includes a nozzle 41, which is connected to the interior of the dry powder storage tank 4 through an injection pipe 42. The injection pipe 42 is a metal pipe with a diameter of 8 mm and a wall thickness of 0.5 cm. The nozzle 41 and the injection pipe 42 are separated by a metal fusible piece. The outlet of the nozzle 41 is arranged toward multiple electrical connectors 31. After the dry powder in the dry powder storage tank 4 is sprayed out, it directly acts on the electrical connector 31 to block the combustion chain, that is, the electrical fire is quickly extinguished by chemical suppression.

[0019] The fusing temperature of the metal fusible link is set to a redundant temperature of ambient temperature + 30 degrees. The ambient temperature refers to the maximum temperature of long-term operation of wires and cables in the table below. For example: the ambient temperature of the plastic wire is 70 degrees, so its fusing action temperature is 70+30=100 degrees, and the size is a thin cylinder with a diameter of 1.6 cm and a thickness of 1 mm.

[0020] The device also includes a pressure switch 5, which is connected to the nozzle 41 through a pressure pipe 6. The pressure switch 5 is connected to the fire input module 7 and the fire controller 8 in sequence through a fire cable. The fire cable adopts a ZR-RVS-2X1.5JDG20 cable. After receiving the pressure alarm signal, the pressure switch 5 transmits the fire alarm signal to the fire control system.

[0021] The pressure value of the pressurized nitrogen in the dry powder storage tank 4 is 1.2 MPa.

[0022] A wire threading hole 9 is opened on the junction box 2, and the pressure pipe passes through the wire threading hole 9. The wire threading hole 9 is sealed with fireproof mud, and the interior of the junction box 2 forms a closed space.

[0023] The utility model utilizes the closedness of the interior of the junction box 2 itself, and configures a dry powder storage tank 4 and a metal fusible piece inside the junction box 2. Once an electrical fire occurs in the junction box 2, the temperature inside the junction box 2 rises. Once the temperature exceeds the fusing temperature of the metal fusible piece, the metal fusible piece melts, the nozzle 41 and the injection pipe 42 are connected but will not leak. The dry powder in the dry powder storage tank 4 is sprayed out by the nozzle 41 under the pressure of nitrogen, and the sprayed dry powder fire extinguishing agent puts out the ignition point in the junction box 2, thereby realizing chemical fire extinguishing. At the same time, the sprayed nitrogen drives the pressure switch 5 to operate, and accurately sends a fire alarm signal to the fire control room through the alarm bus at the first time, so that timely investigation and maintenance are carried out to maintain the safe operation of the entire circuit system.

[0024] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the scope of the present invention.

Claims

1. An electrical connector with fire extinguishing function, characterized in that: It comprises a fixing bracket (1), one end of the fixing bracket (1) is provided with a first connecting through hole (11), and the other end of the fixing bracket (1) is provided with a second connecting through hole (12); It also comprises a junction box (2), the junction box (2) being mounted on the fixed bracket (1), a junction board (3) being arranged inside the junction box (2), a plurality of electrical connectors (31) being mounted on the junction board (3), a dry powder storage tank (4) being mounted inside the junction box (2), a dry powder fire extinguishing agent being stored in the dry powder storage tank (4), and pressurized nitrogen being filled in the dry powder storage tank (4); It also includes a nozzle (41), the nozzle (41) being connected to the interior of the dry powder storage tank (4) via an injection pipe (42), the nozzle (41) and the injection pipe (42) being separated by a metal fusible sheet, and the outlet of the nozzle (41) being arranged toward a plurality of electrical connectors (31); It also includes a pressure switch (5), which is connected to the nozzle (41) through a pressure pipe (6), and the pressure switch (5) is connected to the fire input module (7) and the fire controller (8) in sequence through a fire cable.

2. The electrical connector with fire extinguishing function according to claim 1, characterized in that: The pressure value of the pressurized nitrogen in the dry powder storage tank (4) is 1.2 MPa.

3. The electrical connector with fire extinguishing function according to claim 1, characterized in that: The junction box (2) is provided with a threading hole (9), the pressure pipe passes through the threading hole (9), and the threading hole (9) is sealed with fireproof mud.

4. The electrical connector with fire extinguishing function according to claim 1, characterized in that: The junction box (2) is 86 mm long, 86 mm wide and 50 mm high.

Images