Electrical fire monitoring device and method

Abstract

The invention discloses an electrical fire monitoring device and method, and relates to the technical field of power distribution. The electrical fire monitoring device comprises a monitoring unit, a fireproof unit and a control unit; the power distribution cabinet is internally provided with a mounting rack for mounting electrical elements, and the fireproof unit comprises a compression tank, a dry powder storage assembly and a spraying assembly; the compression tank is fixedly installed at the bottom end of the interior of the power distribution cabinet, compressed carbon dioxide gas is stored in the compression tank, the dry powder storage assembly comprises a powder storage box fixedly arranged at the top end of the interior of the power distribution cabinet, and the bottom of the powder storage box communicates with a vertical discharging channel. The monitoring unit collects temperature, humidity and smoke information in the power distribution cabinet in real time, after an electrical element is on fire, the control unit only needs to control the electromagnetic valve to be opened, the pair of injection pipes can rotationally inject carbon dioxide gas mixed with dry powder towards the electrical element in all directions, flames are rapidly extinguished, and the safety of the power distribution cabinet is improved. And the fireproof safety of the power distribution cabinet is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power distribution, in particular to the technical field of fire protection of power distribution cabinets, in particular to an electrical fire monitoring device and method. Background Art

[0002] At present, with the continuous development of social economy, electric energy has become an indispensable energy source in people's daily life and social development. Distribution boxes are used in the process of transmitting and controlling electric energy, and a large number of distribution modules are used inside the distribution cabinet. The heat is concentrated between the distribution modules, and the power modules are prone to aging and short circuit, and are easily affected by the external environment, resulting in the distribution cabinet often having the potential safety hazard of fire. The current distribution cabinet has poor fire resistance. Once an electrical fire occurs in the distribution cabinet and it is not discovered in time, it will cause an electrical short circuit, causing immeasurable economic losses and safety accidents to the enterprise.

[0003] Chinese patent publication number CN114744495B discloses an electrical fire monitoring method and device. This patent can monitor the internal situation of a distribution box in real time through a camera. When an electrical fire is detected in the distribution box, the first driving member and the second driving member are started to drive the absorbent cotton block to face the location where the electrical fire occurs, and then the third driving member is started to make the absorbent cotton block abut the location of the electrical fire. Therefore, before the inspection personnel come to the distribution box for maintenance, the fire can be suppressed by the absorbent cotton block with water, thereby improving the efficiency of handling the distribution box where the electrical fire occurs.

[0004] However, this patent has the following defects: when a large-scale fire occurs in the distribution box, the effect of suppressing the flame by absorbent cotton is poor, which can easily cause the flame to spread, and the fire protection effect of the distribution cabinet is poor. Summary of the invention

[0005] The object of the present invention is to provide an electrical fire monitoring device and method to solve the problems raised in the above background technology.

[0006] In order to achieve the above-mentioned invention object, the present invention adopts the following technical scheme: The present invention provides an electrical fire monitoring device, comprising a monitoring unit, a fire prevention unit and a control unit; a mounting frame for installing electrical components is provided in the power distribution cabinet, and the fire prevention unit comprises a compression tank, a dry powder storage component and a spray component; The compression tank is fixedly installed at the bottom end of the power distribution cabinet, and compressed carbon dioxide gas is stored in the compression tank. The dry powder storage assembly includes a powder storage box fixedly arranged at the top end of the power distribution cabinet. The bottom of the powder storage box is connected to a vertical feeding channel, and the bottom end of the feeding channel is connected to a horizontal mixing pipe. One end of the mixing pipe is connected to the output port of the compression tank through a first connecting pipe, and the first connecting pipe is provided with a solenoid valve. The injection assembly includes injection pipes symmetrically and rotatably mounted on both sides of the distribution cabinet door, the injection pipes are located in the distribution cabinet, and the injection pipes are vertically arranged, and strip injection holes are evenly arranged on the outer wall of the injection pipe along its length direction, the injection assembly also includes a covering shell sleeved on the outside of the injection pipe, and a strip notch facing the mounting frame is reserved on the covering shell; the injection assembly also includes a driving component for driving the injection pipe to rotate, and a second connecting pipe is arranged at one end of the mixing pipe away from the first connecting pipe, and the second connecting pipe has two output ends, and the two output ends of the second connecting pipe are respectively connected to the top ends of a pair of injection pipes through rotating joints.

[0007] Furthermore, the bottom of the powder storage box is conical to form a conical portion, a columnar cavity is formed in the discharge channel, a part of the upper half of the columnar cavity is in the conical portion, a part of the lower half of the columnar cavity is in the mixing pipe, a rotating shaft is rotatably arranged at the center position of the columnar cavity, blades are evenly arranged on the outside of the rotating shaft, and the outer walls of the blades are tightly attached to the inner wall of the columnar cavity.

[0008] Furthermore, a pneumatic channel is vertically arranged on the top of the mixing pipe, and the pneumatic channel is located on the side of the feeding channel close to the first connecting pipe, and a sliding channel is arranged on the side of the conical part close to the pneumatic channel, and the sliding channel is located at the output port of the conical part; A movable plate is provided in the air pressure channel for sealing sliding, a first sliding plate is vertically provided on the top of the movable plate, a first inclined surface facing the sliding channel is provided on the top of the first sliding plate, a second sliding plate is provided in the sliding channel for sealing sliding, a second inclined surface facing the air pressure channel is provided at one end of the second sliding plate away from the conical portion, the second inclined surface is tightly fitted with the first inclined surface, and the second inclined surface and the first inclined surface are slidably matched through a keyway structure; a return spring is also provided in the air pressure channel to provide elastic damping when the movable plate moves upward.

[0009] Furthermore, a side of the second sliding plate away from the first sliding plate is provided with an upwardly inclined insertion surface, and strip-shaped grooves are evenly penetrated on the inclined insertion surface.

[0010] Furthermore, the driving component includes a motor, and the motor is transmission-connected to the injection pipe via a reducer.

[0011] Furthermore, the driving component comprises a spiral blade arranged at the top end of the injection pipe, two side edges of the spiral blade are welded to the inner wall of the injection pipe, and the spiral blade forms two spiral channels at the top end of the injection pipe.

[0012] Furthermore, the monitoring unit includes a temperature sensor, a humidity sensor and a smoke sensor installed in the power distribution cabinet.

[0013] Furthermore, the control unit includes a CPU logic control module, a logic execution control module, a 485 communication interface module, a data storage module, a wireless transmission module, a GPRS communication output module, a power supply management module and a human-machine interface module.

[0014] The present invention also provides an electrical fire monitoring method using the above device, the method comprising: Acquire the collected temperature, humidity, and smoke information of the monitoring unit, and determine whether an electrical fire occurs in the mounting frame by the control unit based on the collected temperature, humidity, and smoke information; If an electrical fire occurs, the control unit will control the solenoid valve to open, releasing the dioxide gas inside the compression tank. The dioxide gas is mixed with the dry powder and discharged from the strip-shaped injection holes of the injection pipe to quickly extinguish the electrical fire.

[0015] Furthermore, if an electrical fire occurs, the method further comprises: 1) The control unit immediately notifies the staff through the GPRS communication output module, and quickly transmits the alarm information to the centralized control center through the 485 communication interface module; 2) The control unit drives the external sound and light alarm through the logic execution control module.

[0016] Compared with the prior art, one or more of the above technical solutions have the following beneficial effects: The present invention uses a monitoring unit to collect temperature, humidity and smoke information in the distribution cabinet in real time. When an electrical component catches fire, the control unit only needs to control the solenoid valve to open, so that a pair of spray pipes can rotate to spray carbon dioxide gas mixed with dry powder toward the electrical component in all directions, so that the flame is quickly extinguished, which greatly increases the fire safety of the distribution cabinet.

[0017] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0019] Figure 1It is a schematic diagram of the structure of the power distribution cabinet of the present invention; Figure 2 It is a schematic diagram of the internal structure of the power distribution cabinet of the present invention; Figure 3 This is a schematic diagram of the structure of the present invention without the power distribution cabinet; Figure 4 It is a schematic diagram of the structure of the dry powder storage assembly of the present invention; Figure 5 It is a schematic diagram of a vertically cut three-dimensional structure of a power distribution cabinet of the present invention; Figure 6 yes Figure 5 Schematic diagram of the local structure at A; Figure 7 yes Figure 3 Another perspective structural diagram of; Figure 8 yes Figure 7 Schematic diagram of the local structure at B; Fig. 9 It is a schematic diagram of the vertical cross-section structure of the power distribution cabinet of the present invention; Fig.10 yes Fig. 9 Schematic diagram of the local structure at C; Fig.11 It is a schematic diagram of the cross-sectional structure of the power distribution cabinet of the present invention; Fig.12 is a schematic structural diagram of a driving component of Embodiment 2 of the present invention; Fig.13 is a schematic structural diagram of a driving component of Embodiment 3 of the present invention; Fig.14 It is a schematic diagram of the CPU logic control module, data storage module, logic execution control module, wireless transmission module and GPRS communication output module of the present invention; Fig.15 It is the circuit principle diagram of the 485 communication interface module of the present invention; Fig.16 It is a schematic diagram of the power management module of the present invention.

[0020] In the figure: 1-power distribution cabinet; 11-mounting frame; 2-compression tank; 21-first connecting pipe; 22-solenoid valve; 3-dry powder storage assembly; 31-powder storage box; 32-feeding channel; 321-columnar cavity; 33-mixing pipeline; 34-conical part; 35-rotating shaft; 36-blade; 4-injection assembly; 41-injection pipe; 42-strip injection hole; 43-coating shell; 44-strip notch; 45-second connecting pipeline; 5-air pressure channel; 51-movable plate; 52-first sliding plate; 53-first inclined plane; 54-reset spring; 6-sliding channel; 61-second sliding plate; 611-oblique insertion surface; 612-strip groove; 62-second inclined plane; 7-motor; 8-spiral blade; 81-spiral channel. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0022] See also Figure 1-Figure 11 The present invention provides embodiment 1: an electrical fire monitoring device, comprising a monitoring unit, a fire prevention unit and a control unit; wherein the monitoring unit is used to collect temperature, humidity and smoke information in the distribution cabinet 1 and transmit the information to the control unit, and the control unit determines whether the electrical component is on fire according to the information transmitted by the monitoring unit. When the electrical component is on fire, the control unit can activate the fire prevention unit to quickly extinguish the flame, thereby greatly increasing the fire safety of the distribution cabinet 1.

[0023] The power distribution cabinet 1 is provided with a mounting frame 11 for mounting gas components, the fire protection unit includes a compression tank 2, a dry powder storage assembly 3 and an injection assembly 4, the compression tank 2 is fixedly installed at the bottom of the power distribution cabinet 1, and the compression tank 2 stores compressed carbon dioxide gas; the dry powder storage assembly 3 includes a powder storage box 31 fixedly arranged at the top of the power distribution cabinet 1, the bottom of the powder storage box 31 is connected to a vertically arranged feed channel 32, and the bottom end of the feed channel 32 is connected to a horizontal mixing pipe 33, one end of the mixing pipe 33 is connected through a first connection The pipe 21 is connected to the output port of the compression tank 2, and the first connecting pipe 21 is provided with a solenoid valve 22; the injection assembly 4 includes injection pipes 41 symmetrically and rotationally mounted on both sides of the door of the power distribution cabinet 1, the injection pipe 41 is in the power distribution cabinet 1, and the injection pipe 41 is vertically arranged, the two ends of the injection pipe 41 are sealed, and the outer wall of the injection pipe 41 is uniformly provided with strip injection holes 42 along its length direction, the injection assembly 4 also includes a covering shell 43 sleeved on the outside of the injection pipe 41, and the covering shell 43 is reserved with a strip notch 44 facing the mounting frame 11; A second connecting pipeline 45 is provided at one end of the mixing pipeline 33 away from the first connecting pipe 21 . The second connecting pipeline 45 has two output ends. The two output ends of the second connecting pipeline 45 are respectively connected to the top ends of a pair of injection pipes 41 through rotating joints.

[0024] This embodiment is based on the above-mentioned setting. When the electrical component catches fire, the control unit controls the solenoid valve 22 to open. At this time, the carbon dioxide gas stored in the compression tank 2 will enter the mixing pipe 33 through the first connecting pipe 21. When the carbon dioxide gas passes through the unloading channel 32 of the powder storage box 31 in the mixing pipe 33, the dry powder in the powder storage box 31 will be mixed with the carbon dioxide gas and enter the injection pipe 41 through the second connecting pipe 45 respectively. At this time, the driving component drives a pair of injection pipes 41 to rotate. During the rotation of the pair of injection pipes 41, when the strip injection hole 42 of the injection pipe 41 rotates to the strip notch 44 of the covering shell 43, the carbon dioxide gas mixed with the dry powder will be ejected from the strip injection hole 42, wherein the dry powder will cover the surface of the electrical component to extinguish the flame and prevent the flame from spreading, and the carbon dioxide will diffuse around the electrical component to isolate oxygen and quickly extinguish the flame, thereby greatly increasing the fire safety of the distribution cabinet 1.

[0025] In this embodiment, the bottom of the powder storage box 31 is conical to form a conical portion 34, and a columnar cavity 321 is formed in the discharge channel 32. A part of the upper half of the columnar cavity 321 is in the conical portion 34, and a part of the lower half of the columnar cavity 321 is in the mixing pipe 33. A rotating shaft 35 is rotatably arranged at the center position of the columnar cavity 321, and blades 36 are evenly arranged on the outside of the rotating shaft 35, and the outer wall of the blade 36 is tightly attached to the inner wall of the columnar cavity 321.

[0026] Based on the above design, when the rotating shaft 35 is not rotating, the blades 36 of the rotating shaft 35 can have a blocking effect, that is, the discharge channel 32 is in a blocked state, so that the dry powder can be sealed and stored in the powder storage box 31, and when the carbon dioxide gas enters the mixing pipe 33, the carbon dioxide gas will push the blades 36 to move and thereby cause the rotating shaft 35 to rotate. After the rotating shaft 35 rotates, the dry powder stored in the powder storage box 31 will be evenly brought to the mixing pipe 33 by the blades 36 for quantitative mixing with the carbon dioxide gas, thereby avoiding excessive discharge of dry powder in the powder storage box 31, which will cause blockage of the pipeline.

[0027] In this embodiment, a pneumatic channel 5 is vertically provided at the top of the mixing pipe 33, and the pneumatic channel 5 is located on the side of the unloading channel 32 close to the first connecting pipe 21, and a sliding channel 6 is provided on the side of the conical portion 34 close to the pneumatic channel 5, and the sliding channel 6 is located at the output port of the conical portion 34; A movable plate 51 is sealed and slidably arranged in the air pressure channel 5, a first sliding plate 52 is vertically arranged on the top of the movable plate 51, a first inclined surface 53 facing the sliding channel 6 is arranged on the top of the first sliding plate 52, a second sliding plate 61 is sealed and slidably arranged in the sliding channel 6, a second inclined surface 62 facing the air pressure channel 5 is arranged at one end of the second sliding plate 61 away from the conical portion 34, the second inclined surface 62 is tightly fitted with the first inclined surface 53, and the second inclined surface 62 and the first inclined surface 53 are slidably matched through a keyway structure; a return spring 54 is also arranged in the air pressure channel 5 to provide elastic damping when the movable plate 51 moves upward.

[0028] As mentioned above, the pair of injection tubes 41 rotate continuously during operation (the purpose of such design is to limit the injection range of the injection tube 41 through the strip-shaped notch 44 of the covering tube, so that the carbon dioxide gas of the mixed dry powder is continuously swung and ejected from the front of the electrical component); therefore, during the rotation of the injection tube 41, the strip-shaped injection hole 42 of the injection tube 41 will be gap-blocked by the covering tube; When the strip-shaped injection hole 42 of the injection tube 41 is blocked by the covering tube, the air pressure in the mixing pipe 33 increases. At this time, the movable plate 51 moves up through the first sliding plate 52 to push the second sliding plate 61 to move toward the conical portion 34; when the strip-shaped injection hole 42 of the injection tube 41 rotates to the strip-shaped notch 44 of the covering tube, the air pressure in the mixing pipe 33 decreases. Under the action of the return spring 54, the movable plate 51 moves down through the first sliding plate 52 to pull the second sliding plate 61 to move away from the conical portion 34. In this way, the second sliding plate 61 can move left and right in the conical portion 34 to disturb and crush the dry powder and prevent the dry powder from bridging, so as to avoid the dry powder in the conical portion 34 from being blocked due to compaction and unable to fall into the discharge channel 32 normally.

[0029] In this embodiment, a side of the second sliding plate 61 away from the first sliding plate 52 is provided with an upwardly inclined insertion surface 611 , and strip-shaped grooves 612 are uniformly provided on the inclined insertion surface 611 .

[0030] Embodiment 2, as Fig.12 As shown, based on Example 1, the driving component is a motor 7, and the motor 7 is connected to the spray pipe 41 through a reducer. When the electrical component catches fire, the motor 7 can drive a pair of spray pipes 41 to rotate through the reducer, so that the spray pipes 41 can swing from the front of the electrical component to spray dry powder.

[0031] Embodiment 3, as Fig.13 As shown, based on Example 1, the driving component includes a spiral blade 8 disposed at the top of the injection pipe 41, and both sides of the spiral blade 8 are welded to the inner wall of the injection pipe 41. The spiral blade 8 forms two spiral channels 81 at the top of the injection pipe 41. When the carbon dioxide gas enters the two spiral channels 81 of the injection pipe 41, the injection pipe 41 can automatically rotate under the impact of the carbon dioxide gas.

[0032] Embodiment 3, based on Embodiment 1, the monitoring unit comprises a temperature sensor, a humidity sensor and a smoke sensor (all not shown) installed in the power distribution cabinet 1 .

[0033] The control unit includes a CPU logic control module, a logic execution control module, a 485 communication interface module, a data storage module, a wireless transmission module, a GPRS communication output module, a power supply management module and a human-machine interface module.

[0034] Among them, the control unit collects the real-time data of temperature, humidity and smoke uploaded by the monitoring unit through the wireless transmission module, and detects, calculates and judges through the CPU logic control module, and saves it in the storage module.

[0035] After the CPU logic control module performs calculations and judgments, if there is a dangerous situation, it will immediately notify the staff through the GPRS communication output module, and quickly transmit the alarm information to the centralized control center through the 485 communication interface module. The logic execution control module drives the external sound and light alarm to promptly and effectively remind the current on-duty personnel to deal with it in time and minimize the loss. When the external power outage occurs, the backup power supply starts immediately to provide power to the control unit to ensure the normal output of the alarm information. The human-machine interface uses a touch screen Chinese character display, which is easy to operate.

[0036] Specifically: like Fig.14 As shown, D3 is the CPU logic control module (hereinafter referred to as CPU) of the control unit, the power supply is 3.3V, and the 48th pin is the power supply pin; C4, C6 and G1 constitute the oscillator circuit, which provides the CPU with a reference oscillation frequency of 8MHz, ensuring that the CPU can multiply to an accurate 200MHz operation, ensuring the speed and accuracy of CPU calculations; C7, C8, C9, C10, C11, C12, C13 are the power supply filter circuit; D5 is the wireless transmission module of the control unit, which is a wireless receiving circuit. After the temperature, humidity and smoke information of the monitoring area is sent by the external monitoring unit, it is transmitted to the CPU through pins 6, 7, 8 and 9. After the CPU receives the information from D5, it makes a judgment through high-speed calculation and now stores the result in D4 (data storage module) for reference, and makes corresponding logic control according to the judgment result.

[0037] When the CPU determines that there is a fire alarm, it sends information to the 1 and 3 interfaces of D8 (logic execution module) through the 16 and 17 control interfaces. After receiving the instructions from the CPU, D8 controls the KA1 and KA2 relays to close through the 14 and 16 feet, and controls the external sound and light alarm to sound a fire alarm.

[0038] When the CPU determines that there is a fire alarm, while completing the above alarm, it sends information to the 6th and 7th pins of TX1 (GPRS communication output module) through the 19th and 20th pin control interface. After TX1 receives the instruction from the CPU, it sends the alarm information to the relevant person in charge through the antenna connected to the transmitting pin 19th pin, thus completing the entire monitoring alarm purpose.

[0039] Power supply management module: like Fig.16 As shown, P2 is the external power input interface, and pin 1 of P2 is the ground terminal of the entire system controller. Pin 1 of P2 is connected to the input pin 8 of D15 (PW4203 switching power management chip) through anti-reverse diodes D11 and D12 and filtered by capacitor C17.

[0040] D13 prevents voltage backflow; resistor R37 and light-emitting diode RED form a power display circuit. RED lights up to indicate power is available, and RED off to indicate no external power supply; RONR1 and RONR2 form a reference feedback voltage circuit. D15 monitors the midpoint voltage of the two resistors through pin 4 to control the output voltage; L1 and RPROG1 form an oscillation voltage regulation circuit, which is connected to pins 2 and 7 of D15 to form a circuit for adjusting the output voltage; when the voltage is adjusted to 12V, it is output from pin 3 of D15, and after filtering by C23 and C24 and D16 to prevent reverse power supply, it outputs VOUT, achieving the function of automatic voltage regulation of the power supply.

[0041] P3 is an external power switch, which plays a role in controlling the start and stop. When P3 is closed, the power supply VOUT (+12v) is connected to the input pin 1 of the voltage regulator U1 (78M05) after being filtered by C18 and C20. After being stabilized to +5v by U1, it is output from the 3rd pin of U1, filtered by C21 and C22, and then to the input pin 3 of the voltage regulator N1 (AMS1117-3.3V). After being stabilized to +3.3V by N1, it is filtered by C25 and C26 and used as the power supply for the CPU. In this way, after two-stage voltage stabilization, the 12V has completed the different working voltage levels required by this system controller.

[0042] In this embodiment, the control unit quickly transmits the alarm information to the centralized control center through 1RS485 communication (A3, B3), and 2RS485 communication (A4, B4) is reserved. The working principle of RS485 is as follows: Fig.15 As shown (taking A3 and B3 as examples): The power supply system of RS485 is U2. The power supply management module inputs 5V voltage into pins 1 and 2 of U2, and outputs it from pins 3 and 4 after internal conversion to provide power for RS485.

[0043] When the CPU detects an abnormality, the TX and RX interfaces send and receive information, which is connected to the internal power supply 3.3V through the pull-up resistors R40 and R41 to ensure signal stability. The signal is isolated from the external interface through the photoelectric isolation E5 and E6 to ensure that the CPU will not be damaged.

[0044] The CPU's send and receive data is transmitted to pins 1 and 4 of D18 (SP485 chip) via pin 1 of E5 and pin 4 of E6. R44 and R45 are pull-up resistors to stabilize the voltage to 5V. R47 and R49 are bias resistors for the base and collector of the automatic send and receive transistor Q6.

[0045] Pins 5 and 8 of the D18 (SP485) chip are power supply pins; pins 6 and 7 are external communication interfaces, R52 and R53 are pull-up and pull-down resistors of the external interface to ensure the stability of communication; R56 and R57 are connected in series with the external interface circuit to prevent short circuit of the communication line; V4 and V6 are transient diodes, which play the role of voltage clamping of the communication line, that is, to prevent high voltage and lightning strikes.

[0046] Embodiment 4: Based on Embodiment 3, this embodiment further provides an electrical fire monitoring method, the method comprising: Acquire the collected temperature, humidity, and smoke information of the monitoring unit, and determine whether an electrical fire occurs in the mounting frame 11 by the control unit according to the collected temperature, humidity, and smoke information; If an electrical fire occurs, the control unit controls the electromagnetic valve 22 to open, so that the dioxide gas inside the compression tank 2 is released. The dioxide gas is mixed with the dry powder and discharged from the strip injection hole 42 of the injection pipe 41 to quickly extinguish the electrical fire.

[0047] In this embodiment, if an electrical fire occurs: 1. The control unit immediately notifies the staff through the GPRS communication output module, and quickly transmits the alarm information to the centralized control center through the 485 communication interface module.

[0048] 2. The control unit drives the external sound and light alarm through the logic execution control module, which promptly and effectively reminds the current on-duty personnel to take timely measures to minimize the losses.

[0049] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An electrical fire monitoring device, comprising a monitoring unit, a fire prevention unit and a control unit; characterized in that: A mounting frame for installing gas components is provided in the power distribution cabinet, and the fire protection unit includes a compression tank, a dry powder storage assembly and a spray assembly; The compression tank is fixedly installed at the bottom end of the power distribution cabinet, and compressed carbon dioxide gas is stored in the compression tank. The dry powder storage assembly includes a powder storage box fixedly arranged at the top end of the power distribution cabinet. The bottom of the powder storage box is connected to a vertical feeding channel, and the bottom end of the feeding channel is connected to a horizontal mixing pipe. One end of the mixing pipe is connected to the output port of the compression tank through a first connecting pipe, and the first connecting pipe is provided with a solenoid valve. The injection assembly includes injection pipes symmetrically and rotatably mounted on both sides of the distribution cabinet door, the injection pipes are located in the distribution cabinet, and the injection pipes are vertically arranged, and strip injection holes are evenly arranged on the outer wall of the injection pipe along its length direction, the injection assembly also includes a covering shell sleeved on the outside of the injection pipe, and a strip notch facing the mounting frame is reserved on the covering shell; the injection assembly also includes a driving component for driving the injection pipe to rotate, and a second connecting pipe is arranged at one end of the mixing pipe away from the first connecting pipe, and the second connecting pipe has two output ends, and the two output ends of the second connecting pipe are respectively connected to the top ends of a pair of injection pipes through rotating joints.

2. The electrical fire monitoring device according to claim 1, characterized in that: The bottom of the powder storage box is conical to form a conical portion, a columnar cavity is formed in the discharge channel, a part of the upper half of the columnar cavity is in the conical portion, a part of the lower half of the columnar cavity is in the mixing pipe, a rotating shaft is rotatably arranged at the center position of the columnar cavity, blades are evenly arranged on the outside of the rotating shaft, and the outer walls of the blades are tightly attached to the inner wall of the columnar cavity.

3. The electrical fire monitoring device according to claim 2, characterized in that: A pneumatic channel is vertically arranged on the top of the mixing pipeline, and the pneumatic channel is located on the side of the feeding channel close to the first connecting pipe, and a sliding channel is arranged on the side of the conical part close to the pneumatic channel, and the sliding channel is located at the output port of the conical part; A movable plate is provided in the air pressure channel for sealing sliding, a first sliding plate is vertically provided on the top of the movable plate, a first inclined surface facing the sliding channel is provided on the top of the first sliding plate, a second sliding plate is provided in the sliding channel for sealing sliding, a second inclined surface facing the air pressure channel is provided at one end of the second sliding plate away from the conical portion, the second inclined surface is tightly fitted with the first inclined surface, and the second inclined surface and the first inclined surface are slidably matched through a keyway structure; a return spring is also provided in the air pressure channel to provide elastic damping when the movable plate moves upward.

4. The electrical fire monitoring device according to claim 3, characterized in that: A side of the second sliding plate away from the first sliding plate is provided with an upwardly inclined insertion surface, and strip-shaped grooves are evenly penetrated on the inclined insertion surface.

5. The electrical fire monitoring device according to claim 1, characterized in that: The driving component comprises a motor, and the motor is drivingly connected to the injection pipe via a reducer.

6. The electrical fire monitoring device according to claim 1, characterized in that: The driving component comprises a spiral blade arranged at the top end of the injection pipe, two sides of the spiral blade are welded to the inner wall of the injection pipe, and the spiral blade forms two spiral channels at the top end of the injection pipe.

7. The electrical fire monitoring device according to claim 1, characterized in that: The monitoring unit includes a temperature sensor, a humidity sensor and a smoke sensor installed in the power distribution cabinet.

8. The electrical fire monitoring device according to claim 7, characterized in that: The control unit includes a CPU logic control module, a logic execution control module, a 485 communication interface module, a data storage module, a wireless transmission module, a GPRS communication output module, a power supply management module and a human-machine interface module.

9. An electrical fire monitoring method, based on the electrical fire monitoring device of claim 8, characterized in that: The method comprises: Acquire the collected temperature, humidity, and smoke information of the monitoring unit, and determine whether an electrical fire occurs in the mounting frame by the control unit based on the collected temperature, humidity, and smoke information; If an electrical fire occurs, the control unit will control the solenoid valve to open, releasing the dioxide gas inside the compression tank. The dioxide gas is mixed with the dry powder and discharged from the strip-shaped injection holes of the injection pipe to quickly extinguish the electrical fire.

10. The electrical fire monitoring method according to claim 9, characterized in that: If an electrical fire occurs, the method further comprises: 1) The control unit immediately notifies the staff through the GPRS communication output module, and quickly transmits the alarm information to the centralized control center through the 485 communication interface module; 2) The control unit drives the external sound and light alarm through the logic execution control module.

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