Outdoor power transmission tower multi-zone optical flame detection device

Abstract

The invention provides a multi-zone optical flame detection device for an outdoor power transmission tower, which relates to the technical field of optical flame detection devices and comprises a two-zone flame detector, a four-zone flame detector and a super vision multi-zone flame detector. A base, a printed circuit board and a transparent protective shell are arranged in each of the two-zone flame detector, the four-zone flame detector and the super vision multi-zone flame detector, and lightning detection modules are fixedly welded to the printed circuit boards in the two-zone flame detector, the four-zone flame detector and the super vision multi-zone flame detector. The printed circuit board is provided with a moist protective coating, the transparent protective shell is fixedly arranged on the base in a covering mode, the multi-area optical flame detector can accurately judge whether fire behavior around the power transmission tower is far away from the tower body or moves towards the tower body, key information is provided for evaluating the risk and possibility of a fire source, targeted countermeasures can be taken in time, and the safety of power transmission tower fire hazards is improved. And loss caused by fire disasters is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of optical flame detection devices, and more specifically, particularly relates to a multi-zone optical flame detection device for an outdoor transmission tower. Background Art

[0002] In the field of power transmission, especially high voltage cable systems involving transmission towers, there are a series of problems related to fire and safety.

[0003] As the climate changes, windy weather becomes more frequent and intense. In such an environment, the high-voltage cables on transmission towers are prone to swinging, touching and flickering, which can cause brush fires (bush fires). However, in most cases, these fires are not directly caused by transmission lines, but utility companies are often blamed for the losses caused by fires.

[0004] Conventional optical flame detectors currently in use have significant limitations. They cannot effectively distinguish whether the high-voltage cables on the transmission tower come into contact with surrounding objects and generate sparks, nor can they determine whether the origin of the fire is related to the transmission tower or the cables. In the case of a brush fire, it is impossible to accurately determine whether it was caused by a lightning strike or cable contact.

[0005] In addition, the high-frequency discharge phenomenon of ultra-high voltage transmission towers may not only cause fires, but also cause harm to pedestrians under the towers. Especially in high-humidity weather, the risk of such discharge increases, but existing detection methods cannot provide effective warnings in a timely manner. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a multi-zone optical flame detection device for an outdoor transmission tower to solve the above problems.

[0007] A multi-zone optical flame detection device for an outdoor transmission tower comprises a two-zone flame detector, a four-zone flame detector and a super-vision multi-zone flame detector, wherein the two-zone flame detector, the four-zone flame detector and the super-vision multi-zone flame detector are all provided with a base, a printed circuit board and a transparent protective shell, a lightning detection module is fixedly welded on the printed circuit board in the two-zone flame detector, the four-zone flame detector and the super-vision multi-zone flame detector, the base is coated with aluminum and titanium, the printed circuit board is provided with a moisture protection coating, and the transparent protective shell is fixedly covered on the base and is made of infrared-compatible transparent material.

[0008] Preferably, the two-zone flame detector further includes a T-shaped support frame, the lower end of the T-shaped support frame is fixedly installed inside the base, the printed circuit board is sleeved on the outer ring at the bottom of the T-shaped support frame, and at least two narrow view angle infrared sensors and wide view angle infrared sensors are fixedly welded on the T-shaped support frame. The four-zone flame detector further includes a sensor bracket, the lower end of the sensor bracket is fixedly installed on the bottom of the base, the printed circuit board is sleeved outside the bottom of the sensor bracket, the bottom projection of the sensor bracket is a hexagon, the top is a triangle, and the three equilateral faces are all triangles, the top area of ​​the sensor bracket is a first sensor mounting surface, and the three side areas are second sensor mounting surfaces, and each of the first sensor mounting surface and the second sensor mounting surface surface has three narrow view angle infrared sensors fixedly welded on it.

[0009] Preferably, the upper half of the super vision multi-zone flame detector is the same as the two-zone flame detector, and the lower half also includes an ultraviolet sensor and a transparent dome shell, the transparent dome shell fixed cover is arranged under the base, the ultraviolet sensor is fixedly installed at the lower end of the base, the spectral range of the ultraviolet sensor is 160nm to 250nm, the printed circuit board includes a PCB circuit board, the upper and lower layers of the PCB circuit board are wrapped in sequence by an insulating coating, a copper foil, a metal coating and a conformal coating, the PCB circuit board is wrapped with an electromagnetic shielding material, each of the lightning detection modules includes an electromagnetic sensor and an acoustic microphone, the electromagnetic sensor receives the electrical signal of the discharge, and the acoustic microphone captures the roar of thunder, and calculates the distance of the lightning by the discharge delay and sound wave pickup.

[0010] Preferably, the two-zone flame detector has an overall diameter of 100 mm to 150 mm, a detection speed of 3 seconds to 10 seconds, and a weight of approximately 1 kg or less. When the installation height is 20 meters, the narrow view angle infrared sensor has a coverage circle radius of 10 meters on the ground, and the wide view angle infrared sensor has a coverage circle radius of 35 meters on the ground. The four-zone flame detector has an overall diameter of 100 mm to 150 mm, a detection speed of 3 seconds to 10 seconds, and a weight of approximately 1 kg or less. When installed on a 20-meter-high tower, it can detect four areas from the center height of the tower downward, and the ground coverage range can be divided into 13 areas through overlapping logic. The super vision multi-zone flame detector has an overall diameter of 100 mm to 150 mm, a detection speed of 3 seconds to 10 seconds, and the ultraviolet sensor monitors the upper space of the tower, and the narrow view angle infrared sensor or the wide view angle infrared sensor detects the two-zone space below the tower.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] In the present invention, the multi-zone optical flame detector can accurately determine whether the fire around the transmission tower is moving away from the tower body or towards the tower body, providing key information for assessing the risk and possibility of the fire source, helping to take targeted response measures in a timely manner and reduce the losses caused by the fire.

[0013] By monitoring the dynamics of fire in real time, when the fire may endanger the tower structure, the fire extinguishing agent can be released in time to effectively protect the tower from high temperature damage, extend the service life of the transmission tower, and ensure the stability of power transmission.

[0014] Multi-zone optical flame detectors can accurately detect whether a fire on a tower is caused by a lightning strike or a natural phenomenon, providing a strong basis for clarifying the cause of the fire and attribution of responsibility, and preventing utility companies from being wrongly accused.

[0015] When faced with brush fires, the ability to quickly detect and respond when the fire is still small enhances the timeliness and effectiveness of fire extinguishing, reduces the probability of large-scale brush fires, and protects the surrounding environment and ecology. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the two-zone flame detector of the present invention;

[0017] Figure 2 It is a schematic diagram of the two-zone flame detector of the present invention used for tower detection;

[0018] Figure 3 It is a schematic diagram of ground detection in two areas of the present invention;

[0019] Figure 4 It is a schematic diagram of the overall structure of the four-zone flame detector of the present invention;

[0020] Figure 5 This is a schematic diagram of a four-zone flame detector used for tower detection in the present invention;

[0021] Figure 6 is a ground schematic diagram of the second detection area of ​​the present invention;

[0022] Figure 7 It is a schematic diagram of the overall structure of the super vision multi-zone flame detector of the present invention;

[0023] Figure 8 It is a schematic diagram of the structure of the ultraviolet sensor of the present invention;

[0024] Fig. 9 This is a schematic diagram of the super vision multi-zone flame detector of the present invention used for tower detection;

[0025] Fig.10 It is a schematic diagram of the overall structure of the printed circuit board of the present invention.

[0026] In the figure, the correspondence between the component names and the figure numbers is: 1. First detection area; 11. Second detection area; 12. Third detection area; 13. Fourth detection area; 15. PCB circuit board; 16. Insulation coating; 17. Copper foil; 18. Metal coating; 19. Conformal coating; 2. Two-zone flame detector; 21. Lightning detection module; 22. T-shaped support frame; 23. Narrow view angle infrared sensor; 24. Wide view angle infrared sensor; 25. Printed circuit board; 26. Transparent protective shell; 27. Base; 3. Four-zone flame detector; 31. Sensor bracket; 32. First sensor mounting surface; 33. Second sensor mounting surface; 37. Fifth detection area; 38. Sixth detection area; 4. Super vision multi-zone flame detector; 41. Transparent dome shell; 42. UV sensor. DETAILED DESCRIPTION

[0027] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0028] See also Figure 1-Figure 10 The present invention provides an outdoor transmission tower multi-zone optical flame detection device, comprising a two-zone flame detector 2, a four-zone flame detector 3 and a super-vision multi-zone flame detector 4, wherein the two-zone flame detector 2, the four-zone flame detector 3 and the super-vision multi-zone flame detector 4 are all provided with a base 27, a printed circuit board 25 and a transparent protective shell 26, wherein the base 27 is made of aluminum and titanium coating to maintain a sand-proof and corrosive environment, the printed circuit board 25 is provided with a moisture protection coating, the transparent protective shell 26 is fixedly covered on the base 27, and the transparent protective shell 26 is a transparent DOM made of an infrared-compatible transparent material (such as FEP or ETFE), the two-zone flame detector 2, the four-zone flame detector 3 and the super-vision multi-zone flame detector 4 are all fixedly installed with a printed circuit board 25 at the bottom of the base 27, and each printed circuit board 25 is fixedly welded with a lightning detection module 21;

[0029] Among them, the two-zone flame detector 2 (such as Figure 1 ) also includes a T-shaped support frame 22, the lower end of the T-shaped support frame 22 is fixedly installed inside the base 27, and the printed circuit board 25 is sleeved on the outer ring at the bottom of the T-shaped support frame 22, and at least two narrow view angle infrared sensors 23 and wide view angle infrared sensors 24 are fixedly welded on the T-shaped support frame 22;

[0030] Among them, the four-zone flame detector 3 (such as Figure 4) also includes a sensor bracket 31 inside, the lower end of the sensor bracket 31 is fixedly mounted on the bottom of the base 27, and the printed circuit board 25 is sleeved outside the bottom of the sensor bracket 31, the bottom projection of the sensor bracket 31 is a hexagon, the top of the sensor bracket 31 is a triangle, and the three equilateral faces of the sensor bracket 31 are all triangles, the top area of ​​the sensor bracket 31 is a first sensor mounting surface 32, and the three side areas of the sensor bracket 31 are second sensor mounting surfaces 33, and each of the first sensor mounting surface 32 and the second sensor mounting surface 33 is fixedly welded with three narrow view angle infrared sensors 23;

[0031] Among them, super vision multi-zone flame detector 4 (such as Figure 7 and 8 ) is exactly the same as the two-zone flame detector 2, and the lower half of the super-vision multi-zone flame detector 4 also includes an ultraviolet sensor 42 and a transparent dome shell 41, the transparent dome shell 41 is fixedly covered under the base 27, and the ultraviolet sensor 42 is fixedly installed at the lower end of the base 27. The spectrum range of the ultraviolet sensor 42 is 160nm to 250nm, and the spectrum range of the ultraviolet sensor 42 is not covered by the natural ultraviolet emission of the sun. The number of the narrow view angle infrared sensor 23 and the wide view angle infrared sensor 24 inside the super-vision multi-zone flame detector 4 is at least two, which can monitor two-zone or four-zone flame monitoring;

[0032] Among them, the components of the printed circuit board 25 (such as Fig.10 ) includes a PCB circuit board 15, and the upper and lower layers of the PCB circuit board 15 are wrapped in sequence by an insulating coating 16, a copper foil 17, a metal coating 18 (such as a powder coating, a phosphorus alloy coating, or a nickel-based powder coating) and a conformal coating 19. The high-voltage iron tower will emit electromagnetic waves and interfere with the functions of nearby electronics. The multi-zone flame detector relies on a sensitive infrared sensor and requires a high signal-to-noise ratio to work reliably. The PCB circuit board 15 is wrapped with an electromagnetic shielding material. The insulating coating 16 can prevent the PCB from short-circuiting with the shielding material. If the magnetic field penetrates the copper foil 17, eddy currents will be generated. The eddy current magnetic field is used to offset the penetrated magnetic field. The approaching magnetic field guides the metal coating 18 away by the surface Hy-Mu material, and the conformal coating 19 protects the circuit from moisture exposure.

[0033] Among them, each lightning detection module 21 includes an electromagnetic sensor and an acoustic microphone. The electromagnetic sensor receives the electrical signal of the discharge, and the microphone can capture the roar of thunder. The time delay of the discharge and the sound wave pickup are used to calculate the distance of the lightning. The timing delay from the discharge signal to the thunder noise will allow the device to determine the distance of the source of the electrical flash, and it can be judged whether the fire is caused by close-range lightning or other reasons.

[0034] Example:

[0035] Embodiment 1: Two-zone flame detector, comprising two-zone flame detector 2 (such as Figure 1 ), the overall size of the two-zone flame detector 2 is 100 mm to 150 mm in diameter, the detection speed is from 3 seconds to 10 seconds, and the weight is about 1 kg or less;

[0036] If the height of the installed two-zone flame detector 2 is 20 meters, the radius of the coverage circle on the ground by the narrow view angle infrared sensor 23 is 10 meters. If the height of the installed two-zone flame detector 2 is 20 meters, the radius of the coverage circle on the ground by the wide view angle infrared sensor 24 is 35 meters.

[0037] like Figure 2 A two-zone flame detector 2 is shown at a height of 20 meters on the tower, where the fifth detection zone 37 and the sixth detection zone 38 are supervised areas below the tower, and these areas overlap with each other. If a fire is detected, the detection time of each area can determine whether the fire moves from the outside to the inside, and whether the external fire moves from the inside to the outside. The two-zone flame detector 2 can detect a 0.3X0.3-meter fire of 80 meters within 3 seconds for each area. The lightning detection module 21 can distinguish between electrical discharges through high-voltage transmission lines, or lightning discharges. If lightning starts a fire behind, it can be confirmed that the fire was caused by lightning.

[0038] Ground Coverage:

[0039] At 60 feet (20 meters) high, the wide-view angle infrared sensor 24-view detector will cover a ground area with a radius of 104 feet (3 meters for a four-zone flame detector).

[0040] At 60 feet (20 meters) in height, the narrow-view angle infrared sensor 23 viewing angle detector will cover a ground area with a radius of 35 feet (10 meters).

[0041] Ground coverage of two-zone flame detector 2 (such as Figure 3 ), there are 2 concentric zones, zone 1 is the inner circle zone. When the fire starts from the inner circle, the alarm will start from zone 1 (for a 4-meter-high tower of a super vision multi-zone flame detector, the coverage area of ​​the zone is about 4 meters in diameter of the super vision multi-zone flame detector);

[0042] Zone 2, if the fire starts in the outer ring, the alarm can only be seen in Zone 2, (for a super vision multi-zone flame detector 4 meter high tower, the zone coverage is about 80 meters diameter).

[0043] Depending on the location of the transmission tower, different multi-zone flame detector coverage can be selected. If automatic fire extinguishers are used, flame detectors with wider coverage can be selected.

[0044] Embodiment 2: Four-zone flame detector, the four-zone flame detector 3 has an overall diameter of 100 mm to 150 mm, a detection speed of 3 seconds to 10 seconds, and a weight of about 1 kg or less. The four-zone flame detector 3 is mounted on a 20-meter-high tower (such as Figure 5 ), the four-zone flame detector 3 detects four areas from the center height of the tower downwards. These four areas are displayed as 4 circles on the ground. The first detection area 1, the second detection area 11, the third detection area 12 and the fourth detection area 13 are the supervised areas under the tower. These areas overlap with each other. If a fire is detected, the detection time of each area can determine whether the fire moves from the outside to the inside, and whether the external fire moves from the inside to the outside;

[0045] A first sensor mounting surface 32 and three second sensor mounting surfaces 33 are provided in the four-zone flame detector 3. The first sensor mounting surface 32 is used to detect the fourth detection zone 13, and the other three second sensor mounting surfaces 33 are used to detect the first detection zone 1, the second detection zone 11 and the third detection zone 12 respectively. The lightning detection module 21 in the four-zone flame detector 3 is also used to detect lightning.

[0046] Through overlapping logic, the four areas detected by the four-zone flame detector 3 can divide the ground coverage into 13 areas. According to the partition information, the flame detectors in these four areas can send commands to the fire extinguisher system to selectively extinguish the fire in a specific area;

[0047] The fourth detection zone 13 is covered in all directions by the narrow view angle infrared sensor 23 in the first sensor mounting surface 32 (for a super vision multi-zone flame detector 4-meter high tower, the ground cover diameter is 3 meters for the two-zone flame detector 2 to the four-zone flame detector);

[0048] The first detection zone 1, the second detection zone 11 and the third detection zone 12 are fully covered by the narrow view angle infrared sensors 23 in the three second sensor mounting surfaces 33 on the side of the sensor bracket 31 (for a super vision multi-zone flame detector 4-meter high tower, the ground cover diameter is 3 meters for two-zone flame detector 2 to four-zone flame detector);

[0049] Through overlapping logic, these four zone flame detectors can divide the ground coverage into 13 zones. Based on the zone information, these four zone flame detectors can send commands to the fire extinguishing system to selectively extinguish specific areas.

[0050] Embodiment 3: Super vision multi-zone flame detector, the super vision multi-zone flame detector 4 has an overall size of 100 mm in diameter to 150 mm on the PCB, and the detection speed is from 3 seconds to 10 seconds. The super vision multi-zone flame detector 4 is installed on a tower (such as Fig. 9), the ultraviolet sensor 42 in the super vision multi-zone flame detector 4 can monitor the upper space of the tower, monitor the overhead wires, and monitor the electric shock and lightning protection. At the same time, the lightning detection module 21 can perform a second confirmation on the ultraviolet sensor 42 to prevent the ultraviolet sensor 42 from falsely reporting lightning. At the same time, the narrow view angle infrared sensor 23 or the wide view angle infrared sensor 24 in the super vision multi-zone flame detector 4 detects the two zones of space below the tower.

[0051] The embodiments of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. An outdoor transmission tower multi-zone optical flame detection device, characterized in that: The invention comprises a two-zone flame detector (2), a four-zone flame detector (3) and a super-vision multi-zone flame detector (4), wherein each of the two-zone flame detector (2), the four-zone flame detector (3) and the super-vision multi-zone flame detector (4) is provided with a base (27), a printed circuit board (25) and a transparent protective shell (26), wherein each of the two-zone flame detector (2), the four-zone flame detector (3) and the super-vision multi-zone flame detector (4) is fixedly welded with a lightning detection module (21), wherein the base (27) is coated with aluminum and titanium, the printed circuit board (25) is provided with a moisture protection coating, and the transparent protective shell (26) is fixedly covered on the base (27) and is made of an infrared-compatible transparent material.

2. The multi-zone optical flame detection device for outdoor transmission tower according to claim 1, characterized in that: The two-zone flame detector (2) further comprises a T-shaped support frame (22) inside, the lower end of the T-shaped support frame (22) is fixedly mounted inside a base (27), the printed circuit board (25) is sleeved on an outer ring at the bottom of the T-shaped support frame (22), and at least two narrow view angle infrared sensors (23) and a wide view angle infrared sensor (24) are fixedly welded on the T-shaped support frame (22).

3. The multi-zone optical flame detection device for outdoor transmission tower according to claim 1, characterized in that: The four-zone flame detector (3) further comprises a sensor bracket (31) inside, the lower end of the sensor bracket (31) is fixedly mounted on the bottom of the base (27), the printed circuit board (25) is sleeved outside the bottom of the sensor bracket (31), the bottom projection of the sensor bracket (31) is a hexagon, the top is a triangle, and the three equilateral faces are all triangles, the top area of ​​the sensor bracket (31) is a first sensor mounting surface (32), and the three side areas are second sensor mounting surfaces (33), and three narrow view angle infrared sensors (23) are fixedly welded on the surface of each of the first sensor mounting surface (32) and the second sensor mounting surface (33).

4. The multi-zone optical flame detection device for outdoor transmission tower according to claim 3, characterized in that: The upper half of the super vision multi-zone flame detector (4) is the same as the two-zone flame detector (2), and the lower half further comprises an ultraviolet sensor (42) and a transparent dome shell (41), wherein the transparent dome shell (41) is fixedly covered below the base (27), and the ultraviolet sensor (42) is fixedly mounted at the lower end of the base (27), and the spectrum range of the ultraviolet sensor (42) is 160nm to 250nm.

5. The multi-zone optical flame detection device for outdoor transmission tower according to claim 1, characterized in that: The printed circuit board (25) comprises a PCB circuit board (15), wherein the upper and lower layers of the PCB circuit board (15) are wrapped in sequence by an insulating coating (16), a copper foil (17), a metal coating (18) and a conformal coating (19), and the PCB circuit board (15) is wrapped by an electromagnetic shielding material.

6. The multi-zone optical flame detection device for outdoor transmission tower according to claim 1, characterized in that: Each lightning detection module (21) comprises an electromagnetic sensor and an acoustic microphone, wherein the electromagnetic sensor receives the electrical signal of the discharge, and the acoustic microphone captures the roar of thunder, and calculates the distance of the lightning through the time delay of the discharge and the sound wave pickup.

7. The multi-zone optical flame detection device for outdoor transmission tower according to claim 2, characterized in that: The overall size of the two-zone flame detector (2) is 100 mm to 150 mm in diameter, the detection speed is from 3 seconds to 10 seconds, and the weight is about 1 kg or less. When the installation height is 20 meters, the coverage circle radius of the narrow view angle infrared sensor (23) on the ground is 10 meters, and the coverage circle radius of the wide view angle infrared sensor (24) on the ground is 35 meters.

8. The multi-zone optical flame detection device for outdoor transmission tower according to claim 3, characterized in that: The four-zone flame detector (3) has an overall diameter of 100 mm to 150 mm, a detection speed of 3 seconds to 10 seconds, and a weight of about 1 kg or less. When installed on a 20-meter-high tower, it can detect four zones from the center height of the tower downward, and the ground coverage area can be divided into 13 zones through overlapping logic.

9. The multi-zone optical flame detection device for outdoor transmission tower according to claim 4, characterized in that: The super vision multi-zone flame detector (4) has an overall diameter of 100 mm to 150 mm and a detection speed of 3 seconds to 10 seconds.

10. The multi-zone optical flame detection device for outdoor transmission tower according to claim 9, characterized in that: The ultraviolet sensor (42) monitors the space above the tower, and the narrow-view angle infrared sensor (23) or the wide-view angle infrared sensor (24) detects two zones of space below the tower.

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