A power line fire monitoring system and method

Abstract

The application discloses a kind of power transmission line fire monitoring system and method, comprising: controller, beidou positioning module and beidou short message module, power transmission line, power transmission line is connected with manual power-off switch, the power transmission line is divided into main circuit, branch circuit by manual power-off switch, main circuit is close to power grid, branch circuit is close to user end;First CT power module, first CT power module is powered from branch circuit, and power supply for controller;Power-off protection module, power-off protection module is normally closed state, is connected in series on main circuit, and the disconnection of power-off protection module is controlled by controller.Electrical current, voltage and other signals are monitored to control the existing power grid fire monitoring, if it is other situation occurs fire, after fire occurs, power-off switch and monitoring element are located in fire, personnel cannot enter fire to control manual power-off switch, it is not conducive to the problem of using conventional water for fire extinguishing.

Description

Technical Field

[0001] This invention relates to the field of power grid fire monitoring technology, and in particular to a power transmission line fire monitoring system and method. Background Technology

[0002] The power grid is a networked system used to transmit electrical energy. When the transmission of electrical energy is abnormal, it can generate sparks and high temperatures, which can ignite surrounding flammable materials and cause fires. According to statistics, fires caused by electrical equipment account for more than 33.6% of all fire accidents every year. Therefore, it is very necessary to monitor fires caused by the power grid.

[0003] In general, branch lines of power grids that transmit power to factories are equipped with manual and automatic power-off switches, which are controlled by monitoring signals such as current and voltage. If a fire occurs under other circumstances (not caused by electrical faults), after the fire breaks out, the power-off switch and monitoring components are located in the fire, and personnel cannot enter the fire to control the manual power-off switch, which is not conducive to the subsequent use of conventional water for fire extinguishing. Therefore, this invention provides a power transmission line fire monitoring system and method. Summary of the Invention

[0004] In order to overcome the shortcomings and deficiencies of the prior art, the purpose of this invention is to provide a power transmission line fire monitoring system and method.

[0005] The technical solution of the present invention is: a power transmission line fire monitoring system, comprising: a controller, a Beidou positioning module and a Beidou short message module, wherein the controller is electrically connected to the Beidou positioning module and the controller is electrically connected to the Beidou short message module;

[0006] The transmission line is set between the power grid and the user end, and a manual power-off switch is connected to the transmission line. The transmission line is divided into a main line and a branch line by the manual power-off switch. The main line is close to the power grid and the branch line is close to the user end.

[0007] The first CT power supply module draws power from the branch line and supplies power to the controller;

[0008] A power failure protection module, which is normally closed, is connected in series with the main line, and the power failure protection module is controlled to open by the controller;

[0009] The sensing module is one or more of a temperature sensor, a smoke sensor, and a radiation intensity sensor. The sensing module is installed around the branch line and transmits the monitoring data to the controller.

[0010] Preferably, the power failure protection module includes:

[0011] The outer casing is fixedly connected to the outside of the manual power-off switch;

[0012] The device comprises connecting feet, a Z-shaped metal plate, a high-temperature resistant substrate, and a spring. The high-temperature resistant substrate is fixedly connected to the inner bottom of the outer shell. The Z-shaped metal plate is slidably connected to the inside of the outer shell and is located above the high-temperature resistant substrate. A spring is provided between the bottom of the Z-shaped metal plate and the high-temperature resistant substrate. The two ends of the Z-shaped metal plate have two elastic feet in an elastic state. There are two connecting feet, both of which are fixedly connected to the outer shell. Part of the connecting feet is located outside the outer shell, and part of the connecting feet is located inside the outer shell. The part located inside the outer shell has a latch, and the top of the latch has an slant. The two elastic feet cooperate with the latches on the two connecting feet.

[0013] The explosion-proof transistor consists of a first metal block, a second metal block, and an explosion-proof transistor. The first and second metal blocks are fixedly connected to the top of a U-shaped metal sheet, and the first and second metal blocks are provided with an insulating thin layer. The outer shell of the explosion-proof transistor is fixedly connected to the U-shaped metal sheet. The emitter of the explosion-proof transistor is connected to the first metal block, the collector of the explosion-proof transistor is connected to the second metal block, and the base of the explosion-proof transistor is connected to the control signal terminal of the controller.

[0014] It also includes a second CT power supply module, which supplies power to the first metal block and the second metal block.

[0015] Preferably, the sensing module includes:

[0016] The device comprises an installation cylinder, a rotating part, and a detection crossbar. The installation cylinder is sleeved on the branch line. One end of the rotating part is rotatably connected to the outer side of the installation cylinder, and the other end of the rotating part is fixedly connected to the side of the detection crossbar. Sensors are installed at both ends of the detection crossbar.

[0017] Preferably, the portion of the connecting foot located on the outer side of the housing has mounting plate holes.

[0018] Preferably, the outer casing has a first connecting end, a second connecting end, and a control end on its side. One end of the first connecting end is connected to the second metal block, and the other end of the first connecting end is provided with a connecting card portion. One end of the second connecting end is connected to the first metal block, and the other end of the second connecting end is provided with a connecting card portion. One end of the control end is connected to the base of the explosion-proof transistor.

[0019] Preferably, the bottom of the Z-shaped metal sheet is provided with a positioning seat, and the top of the spring is located inside the positioning seat.

[0020] Preferably, both the first CT power supply module and the second CT power supply module are DC inductive power supply components.

[0021] Preferably, the distance between the power failure protection module and the manual power failure switch is 10-100M.

[0022] Preferably, it also includes an alarm, which is electrically connected to the controller.

[0023] A method for monitoring power grid fires based on the BeiDou Navigation Satellite System includes the following steps;

[0024] S1. Install fuse switches in the branch lines between the power grid and the user end to melt the line and cut off the power supply between the power grid and the user end in the event of a fire.

[0025] S2. Power is drawn from upstream of the fuse switch to supply power to the alarm, sensing module, and controller equipped with the fuse switch;

[0026] S3. Power is drawn downstream of the fuse switch to supply power to the heating part of the fuse switch. A control switch is installed in the circuit that draws power downstream of the fuse switch. When the sensing module detects a fire, it transmits a signal to the controller to control the connection of the circuit that draws power downstream.

[0027] The beneficial effects of this invention are as follows: Compared with the prior art, this invention, by setting a first CT power-taking module to draw power from the branch line to supply power to the controller and sensing module, will only react when the branch line is still energized during a fire, controlling the power-off protection module to cut off power to the branch line near the user end. This simplifies the fire situation and makes it easier for firefighters to directly use water to extinguish the fire. Specifically, the thermal triggering structure of the power-off protection module relies on the second CT power-taking module to draw power from the main line. When the power-off protection module responds, there will be no overload or overvoltage, and it will not impact the power grid, thus ensuring stable power transmission. Attached Figure Description

[0028] Figure 1 This is an overall schematic diagram of the present invention;

[0029] Figure 2 This is a schematic diagram of the sensing module of the present invention;

[0030] Figure 3 This is a perspective view of the power failure protection module of the present invention;

[0031] Figure 4 This is a cross-sectional view of the power failure protection module of the present invention;

[0032] Figure 5 This is a schematic diagram of the internal structure of the power failure protection module of the present invention;

[0033] Figure 6 for Figure 4 Enlarged view at point C;

[0034] Figure 7 This is a schematic diagram illustrating the signal transmission principle of the present invention.

[0035] Legend:

[0036] 1. Manual power-off switch; 2. Controller; 3. First CT power supply module; 4. Sensing module; 41. Mounting cylinder; 42. Rotating part; 43. Detector crossbar; 5. Alarm; 6. Power failure protection module; 61. Housing; 62. High temperature resistant substrate; 63. Z-shaped metal piece; 64. Elastic foot; 65. Connecting foot; 66. Bayonet; 67. Slanted part; 68. Mounting plate hole; 69. Spring; 610. Insulating layer; 611. First metal block; 612. Second metal block; 613. Explosion-proof transistor; 614. First connecting end; 615. Second connecting end; 616. Control end; 7. Second CT power supply module; 8. Beidou short message module; 9. Beidou positioning module; a. Main line; b. Branch line. Detailed Implementation

[0037] The invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0038] refer to Figures 1 to 7 A power transmission line fire monitoring system includes: a controller 2, a Beidou positioning module 9, and a Beidou short message module 8. The controller 2 is electrically connected to the Beidou positioning module 9 and the controller 2 is electrically connected to the Beidou short message module 8.

[0039] The data monitored by controller 2 is first transmitted to the monitoring terminal via Beidou short message module 8 for monitoring and management of the power grid system. Relying on the positioning information of Beidou positioning module 9, the monitoring data is matched with the location information so that staff can quickly reach the monitoring location and respond quickly in the event of an accident, reducing the damage caused by a fire.

[0040] The power transmission line is installed between the power grid and the user end, and a manual power-off switch 1 is connected to the power transmission line for manually cutting off the power supply during use. If the power transmission line is manually cut off at the beginning of a fire, the fire is a simple fire situation, and ordinary people in the vicinity can put out the fire. The manual power-off switch 1 separates the main line a and the branch line b. The main line a is close to the power grid, and the branch line b is close to the user end.

[0041] The first CT power supply module 3 draws power from branch line b and supplies power to controller 2; the power failure protection module 6 is normally closed, connected in series on the main line a, and is controlled by controller 2 to open. When no fire occurs, the power failure protection module 6 is normally closed to ensure normal operation of the line; the sensing module 4 is one or more of a temperature sensor, a smoke sensor, and a radiation light intensity sensor. The sensing module 4 is located around branch line b and transmits monitoring data to controller 2.

[0042] Temperature sensors, smoke sensors, and radiation intensity sensors are all components used for fire detection. After a fire occurs, if branch line b is still energized, the first CT power supply module 3 draws power from branch line b to supply power to controller 2. At this time, controller 2 is still in normal working condition. If people nearby discover a fire, they can disconnect the manual power-off switch 1. At this time, controller 2 will stop working, and there will be no leakage in the fire, which will facilitate fire handling. If no one discovers the fire, controller 2 will work, transmit the fire information to the power grid monitoring system through the Beidou system, and control the power-off protection module 6 to disconnect the power from branch line b to the user end.

[0043] Reference Appendix Figures 3-6 In one embodiment, the disclosed power-off protection module 6 includes: a housing 61, which is fixedly connected to the outside of the manual power-off switch 1; a connecting pin 65, a U-shaped metal piece 63, a high-temperature resistant substrate 62, and a spring 69. The high-temperature resistant substrate 62 is fixedly connected to the inner bottom of the housing 61, the U-shaped metal piece 63 is slidably connected to the inside of the housing 61, and the U-shaped metal piece 63 is located above the high-temperature resistant substrate 62. A spring 69 is provided between the bottom of the U-shaped metal piece 63 and the high-temperature resistant substrate 62. 69. Apply elastic force to make the Z-shaped metal piece 63 tend to slide upward. The two ends of the Z-shaped metal piece 63 have two elastic feet 64 in an elastic state. There are two connecting feet 65, both of which are fixedly connected to the outer shell 61. The connecting feet 65 are partially located outside the outer shell 61 and partially located inside the outer shell 61. The part located inside the outer shell 61 has a slot 66. The top of the slot 66 has an inclined part 67. The two elastic feet 64 cooperate with the slots 66 on the two connecting feet 65.

[0044] like Figure 4 , Figure 5 In this state, the two connecting feet 65 are located at both ends of the Z-shaped metal piece 63. The elastic feet 64 at both ends of the Z-shaped metal piece 63 have outward elasticity and can be stably locked in the two connecting feet 65.

[0045] The system comprises a first metal block 611, a second metal block 612, and an explosion-proof transistor 613. The first metal block 611 and the second metal block 612 are fixedly connected to the top of a U-shaped metal sheet 63. An insulating thin layer 610 is provided between the first metal block 611 and the U-shaped metal sheet 63, and the second metal block 612 and the U-shaped metal sheet 63 are also provided with the insulating thin layer 610. The insulating thin layer 610 is made of thermally conductive silicone and serves as insulation. The outer shell of the explosion-proof transistor 613 is fixedly connected to the U-shaped metal sheet 63. The emitter of the explosion-proof transistor 613 is connected to the first metal block 611, the collector of the explosion-proof transistor 613 is connected to the second metal block 612, and the base of the explosion-proof transistor 613 is connected to the control signal terminal of the controller 2. The system also includes a second CT power supply module 7, which supplies power to the first metal block 611 and the second metal block 612.

[0046] The second CT power supply module 7 draws DC power from the main line a. Since the explosion-proof transistor 613 between the first metal block 611 and the second metal block 612 is in a non-conductive state, it cannot draw power and there is no current between them. When the controller 2 continuously provides a high voltage to the base of the explosion-proof transistor 613, the explosion-proof transistor 613 is in a conductive state, that is, the circuit where the second CT power supply module 7 is located is in a connected state. Current is generated in the first metal block 611 and the second metal block 612 and heats up, causing the Z-shaped metal piece 63 to deform due to heat. The elastic force of the elastic feet 64 at both ends is basically ineffective. Under the action of the spring 69, it is pushed upward and disconnected from the connection foot 65, cutting off the connection between the main line and the branch line. At this time, the power grid can be automatically protected.

[0047] When the aforementioned power failure protection module 6 is working, it relies on the second CT power supply module 7 for power, which will not cause short circuits or overloads in the branch lines, and has virtually no impact on the power grid, thus ensuring the stability of the power grid operation.

[0048] Reference Appendix Figure 2 The sensing module 4 includes:

[0049] The device consists of a mounting cylinder 41, a rotating part 42, and a detection crossbar 43. The mounting cylinder 41 is sleeved on the branch line b. One end of the rotating part 42 is rotatably connected to the outer side of the mounting cylinder 41, and the other end of the rotating part 42 is fixedly connected to the side of the detection crossbar 43. Sensors are provided at both ends of the detection crossbar 43.

[0050] Users can install various types of sensors at both ends of the detection crossbar 43, which may include one or more of temperature sensors, smoke sensors, radiation intensity sensors, and gas sensors, and their positions can be set arbitrarily, resulting in excellent performance.

[0051] The portion of the connecting pin 65 located on the outside of the housing 61 is provided with a mounting plate hole 68 to facilitate the connection of the connecting pin 65 to the power grid cable.

[0052] Reference Appendix Figure 3 The outer casing 61 has a first connecting end 614, a second connecting end 615, and a control end 616 on its side. One end of the first connecting end 614 is connected to the second metal block 612, and the other end of the first connecting end 614 is provided with a connecting card part. One end of the second connecting end 615 is connected to the first metal block 611, and the other end of the second connecting end 615 is provided with a connecting card part. One end of the control end 616 is connected to the base of the explosion-proof transistor 613.

[0053] This structural design allows the power failure protection module 6 to be independent, while the second CT power supply module 7 and the controller 2 are connected by detachable wires, which facilitates the maintenance and use of the device.

[0054] It is worth noting that the power failure protection module 6 is a one-time use structure, meaning that it will be damaged and cannot be reset after use. When it is activated, there is a certain delay. The material thickness of the Z-shaped metal sheet 63 can be set to be thicker, and it generally needs to be heated for 5-10 minutes before it disconnects.

[0055] A positioning seat is provided at the bottom of the Z-shaped metal piece 63, and the top of the spring 69 is located inside the positioning seat to limit the spring 69 and prevent it from tilting.

[0056] Both the first CT power supply module 3 and the second CT power supply module 7 mentioned above are DC induction power supply components.

[0057] The distance between the power failure protection module 6 and the manual power failure switch 1 is 10-100M. The manual power failure switch 1 is relatively close to the factory or inside the factory. In the event of a fire, personnel can quickly disconnect the manual power failure switch 1. When the fire begins to spread, personnel can no longer enter the location of the manual power failure switch 1, and the power failure protection module 6 will automatically respond and disconnect.

[0058] It also includes: alarm 5, which is electrically connected to controller 2. In the event of a fire, alarm 5 can alert people in the vicinity, enabling them to detect the fire in time and reduce losses.

[0059] A method for monitoring power grid fires based on the BeiDou system includes the following steps;

[0060] S1. Install fuse switches in the branch lines between the power grid and the user end to melt the line and cut off the power supply between the power grid and the user end in the event of a fire.

[0061] S2. Power is drawn from upstream of the fuse switch to supply power to the alarm, sensing module, and controller equipped with the fuse switch;

[0062] S3. Power is drawn downstream of the fuse switch to supply power to the heating part of the fuse switch. A control switch is installed in the circuit that draws power downstream of the fuse switch. When the sensing module detects a fire, it transmits a signal to the controller to control the connection of the circuit that draws power downstream.

[0063] When the upstream of the fuse switch has been de-energized, this device will not respond because it cannot receive power. When the upstream of the fuse switch is energized, the sensing module detects the occurrence of a fire and draws power from the downstream of the fuse switch to supply power to the heating part of the fuse switch, causing it to heat up and melt, thus breaking the circuit.

[0064] The fuse circuit is heated by power drawn from downstream, without requiring a high current to blow the fuse. This acts as an additional heating element, ensuring that the upstream of the fuse is not affected during the process, thus guaranteeing the normal operation of other areas in the power grid.

[0065] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A power transmission line fire monitoring system, comprising: The controller (2), the Beidou positioning module (9), and the Beidou short message module (8) are electrically connected. The controller (2) is electrically connected to the Beidou positioning module (9) and the controller (2) is electrically connected to the Beidou short message module (8). Its characteristic is that it further includes: The transmission line is set between the power grid and the user end, and a manual power-off switch (1) is connected to the transmission line. The transmission line is divided into a main line (a) and a branch line (b) by the manual power-off switch (1). The main line (a) is close to the power grid, and the branch line (b) is close to the user end. The first CT power supply module (3) draws power from the branch line (b) and supplies power to the controller (2); Power outage protection module (6), which is normally closed, is connected in series on the main line (a), and is controlled by controller (2) to disconnect the power outage protection module (6); The sensing module (4) is one or more of a temperature sensor, a smoke sensor, and a radiation intensity sensor. The sensing module (4) is located around the branch line (b) and transmits the monitoring data to the controller (2). The power failure protection module (6) includes: The outer casing (61) is fixedly connected to the outside of the manual power-off switch (1); The system includes a connecting foot (65), a U-shaped metal plate (63), a high-temperature resistant substrate (62), and a spring (69). The high-temperature resistant substrate (62) is fixedly connected to the inner bottom of the outer shell (61). The U-shaped metal plate (63) is slidably connected inside the outer shell (61) and is located above the high-temperature resistant substrate (62). A spring (69) is provided between the bottom of the U-shaped metal plate (63) and the high-temperature resistant substrate (62). Both ends of the U-shaped metal plate (63) have... The two elastic feet (64) in the elastic state, the two connecting feet (65) are provided, and both are fixedly connected to the outer shell (61). The connecting feet (65) have a part located outside the outer shell (61) and a part located inside the outer shell (61). The part located inside the outer shell (61) is provided with a slot (66). The top of the slot (66) is provided with an inclined part (67). The two elastic feet (64) cooperate with the slots (66) on the two connecting feet (65). The first metal block (611), the second metal block (612), and the explosion-proof transistor (613) are fixedly connected to the top of the Z-shaped metal sheet (63). The first metal block (611) and the Z-shaped metal sheet (63) are provided with an insulating thin layer (610), and the second metal block (612) and the Z-shaped metal sheet (63) are provided with an insulating thin layer (610). The outer shell of the explosion-proof transistor (613) is fixedly connected to the Z-shaped metal sheet (63). The emitter of the explosion-proof transistor (613) is connected to the first metal block (611), the collector of the explosion-proof transistor (613) is connected to the second metal block (612), and the base of the explosion-proof transistor (613) is connected to the control signal terminal of the controller (2). It also includes a second CT power supply module (7), which supplies power to the first metal block (611) and the second metal block (612).

2. The power transmission line fire monitoring system according to claim 1, characterized in that, The sensing module (4) includes: The device consists of an installation cylinder (41), a rotating part (42), and a detection crossbar (43). The installation cylinder (41) is sleeved on the branch line (b). One end of the rotating part (42) is rotatably connected to the outer side of the installation cylinder (41), and the other end of the rotating part (42) is fixedly connected to the side of the detection crossbar (43). Sensors are provided at both ends of the detection crossbar (43).

3. The power transmission line fire monitoring system according to claim 1, characterized in that, The connecting foot (65) located on the outside of the outer casing (61) is provided with mounting plate holes (68).

4. The power transmission line fire monitoring system according to claim 1, characterized in that, The outer casing (61) has a first connection end (614), a second connection end (615), and a control end (616) on its side. One end of the first connection end (614) is connected to the second metal block (612), and the other end of the first connection end (614) is provided with a connection card. One end of the second connection end (615) is connected to the first metal block (611), and the other end of the second connection end (615) is provided with a connection card. One end of the control end (616) is connected to the base of the explosion-proof transistor (613).

5. The power transmission line fire monitoring system according to claim 1, characterized in that, The bottom of the zigzag metal piece (63) is provided with a positioning seat, and the top of the spring (69) is located inside the positioning seat.

6. The power transmission line fire monitoring system according to claim 1, characterized in that, Both the first CT power supply module (3) and the second CT power supply module (7) are DC induction power supply components.

7. The power transmission line fire monitoring system according to claim 1, characterized in that, The distance between the power failure protection module (6) and the manual power failure switch (1) is 10-100M.

8. The power transmission line fire monitoring system according to claim 1, characterized in that, Also includes: An alarm (5) is electrically connected to a controller (2).

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