An alarm device for thermal control in a thermal power plant

Abstract

The present invention discloses an alarm device for thermal control in a thermal power plant, which includes a smoke exhaust housing, a smoke detector, a protection mechanism and a water spraying mechanism. Through the cooperation of the protection mechanism and the water spraying mechanism, the present invention uses the cooling effect of water circulation to cool and protect the surroundings of the smoke detector and the infrared thermometer, preventing high temperature from damaging the smoke detector and the infrared thermometer, reducing the use cost, and at the same time being able to discharge the thick smoke generated by the fire outdoors and spraying water on the fire to extinguish it. When in use, the closed cover completely blocks all the ventilation holes II on the cooling cylinder, and at this time, the smoke detector is also blocked in the cooling cylinder. At this time, the outside smoke no longer enters the cooling cylinder, avoiding damage to the smoke detector caused by heat accumulation. The present invention relates to the technical field of fire prevention, and specifically provides an alarm device for thermal control in a thermal power plant.

Description

Technical Field

[0001] The present invention relates to the technical field of fire prevention, and particularly to an alarm device for thermal control in a thermal power plant. Background Art

[0002] A thermal power plant, abbreviated as a thermal power station, is a factory that uses coal, oil, or natural gas as fuel to produce electric energy. Its basic production process is as follows: The fuel burns in the boiler to heat water into steam, converting the chemical energy of the fuel into heat energy. The steam pressure drives the steam turbine to rotate, converting heat energy into mechanical energy. Then the steam turbine drives the generator to rotate, converting mechanical energy into electric energy.

[0003] Most of the existing alarm devices for thermal control in thermal power plants are fixedly installed on the ceiling of the thermal control equipment room in the power plant, lacking a protection device. When the temperature in the thermal control equipment room of the power plant is too high due to a fire, it will be melted or charred, resulting in the smoke alarm losing its alarm effect and being unable to continuously monitor and warn of the fire situation. Moreover, the alarm device installed at a high place will have a delay in warning of a fire occurring on the ground. In addition, most of the existing alarm devices for thermal control in thermal power plants have a single function and can only give an early warning, but cannot extinguish the fire, easily causing the fire to spread and causing greater harm, threatening the lives and property safety of the staff.

[0004] Therefore, we propose an alarm device for thermal control in a thermal power plant. Summary of the Invention

[0005] In view of the above situation, to overcome the defects of the prior art, the present invention provides an alarm device for thermal control in a thermal power plant that can quickly detect a fire and protect the alarm.

[0006] The technical solution adopted by the present invention is as follows: An alarm device for thermal control in a thermal power plant of the present invention includes a smoke exhaust housing, a smoke alarm, a protection mechanism, and a water spraying mechanism. The smoke exhaust housing is cylindrical, and its top is open. A partition is horizontally and fixedly arranged inside the smoke exhaust housing. The protection mechanism is arranged at the bottom of the partition. The smoke alarm is fixedly arranged at the bottom of the partition and is located inside the protection mechanism. The water spraying mechanism is arranged inside the smoke exhaust housing and is located below the protection mechanism. The water spraying mechanism is connected to the protection mechanism. An air inlet is opened on the circumferential wall of the smoke exhaust housing, and the air inlet is communicated with the protection mechanism and the smoke alarm. An infrared thermometer is installed through the bottom wall inside the smoke exhaust housing.

[0007] Further, the protection mechanism includes a cooling cylinder and an annular channel. The cooling cylinder is fixedly arranged at the bottom of the partition board, and the bottom end of the cooling cylinder is open. The smoke alarm is located inside the cooling cylinder. The annular channel is fixedly arranged at the bottom of the partition board and sleeved outside the cooling cylinder. Air-permeating holes I are formed on both annular inner walls of the annular channel, and the air-permeating holes I are located on the left and right sides of the cooling cylinder. Air-permeating holes II are distributed on the annular inner wall of the cooling cylinder. The air inlet is located around the annular channel, and the water spraying mechanism is connected to the cooling cylinder.

[0008] Further, the protection mechanism further includes an exhaust fan. The exhaust fan is fixedly arranged at the top of the partition board. An exhaust port is formed on the partition board, and the exhaust port communicates with the top of the annular channel.

[0009] Further, the water spraying mechanism includes a lifting plate, a closed cover and a water pressure driving component. The water pressure driving component is arranged on the inner bottom wall of the exhaust smoke housing. The lifting plate is fixedly arranged on the upper part of the water pressure driving component. The closed cover is fixedly arranged on the top of the lifting plate. The top of the closed cover is open. The closed cover is slidably inserted into the cooling cylinder and blocks the air-permeating holes II. The smoke alarm enters the closed cover.

[0010] Further, the water pressure driving component includes a piston cylinder and a support rod. The support rod is fixedly arranged on the inner bottom wall of the exhaust smoke housing. The piston cylinder is fixedly arranged at the top of the support rod. A piston plate is slidably and sealingly arranged inside the piston cylinder. A top rod is fixedly arranged at the top of the piston plate. The top end of the top rod slidably penetrates through the top of the piston cylinder. The lifting plate is fixedly arranged at the top end of the top rod. The lifting plate is disc-shaped and is slidably adapted to the inside of the exhaust smoke housing.

[0011] Further, the water pressure driving component further includes a first spring. The first spring abuts between the inner top wall of the piston cylinder and the top of the piston plate.

[0012] Further, the water pressure driving component further includes a connecting pipe. One end of the connecting pipe communicates with the bottom of the piston cylinder. The inner wall of the cooling cylinder is of a hollow structure, and a spiral water pipe is arranged around the inner wall of the cooling cylinder. One end of the spiral water pipe is connected to the other end of the connecting pipe. A water inlet pipe penetrates through the inner wall of the exhaust smoke housing. The other end of the spiral water pipe is connected to the water inlet pipe. The connecting pipe movably passes through the lifting plate.

[0013] Furthermore, the water pressure driving assembly further includes a buckle unit. The buckle unit is arranged on the inner top wall of the piston cylinder and is connected to the ejector rod. The buckle unit includes a fixed cylinder, a clamping strip, a sliding rod and a second spring. The fixed cylinder is fixedly arranged on the inner top wall of the piston cylinder and is located on one side of the ejector rod. The clamping strip is slidably arranged in the fixed cylinder, and one end of it slidably penetrates through the right end of the fixed cylinder. The sliding rod slidably penetrates through the left end of the fixed cylinder. One end of the sliding rod extends into the fixed cylinder and is fixedly connected to one end of the clamping strip. A limiting plate is fixedly arranged at the end of the sliding rod outside the fixed cylinder. The second spring is slidably sleeved on the sliding rod and abuts between the inner wall of the left end of the fixed cylinder and one end of the clamping strip. The end of the clamping strip extending out of the fixed cylinder is an inclined surface end. A clamping groove is formed on the side wall of the ejector rod. The inclined surface end of the clamping strip is clamped with the clamping groove.

[0014] Furthermore, the water pressure driving assembly further includes an electromagnetic plate. The electromagnetic plate is fixedly arranged on the inner top wall of the piston cylinder and is located on one side of the limiting plate. The limiting plate is made of iron material. The electromagnetic plate attracts the limiting plate.

[0015] Furthermore, the water pressure driving assembly further includes a water outlet pipe. The top end of the water outlet pipe is fixedly arranged at the bottom of the piston plate. A sleeve is arranged through the bottom of the piston cylinder. A through hole is formed on the water outlet pipe. The water outlet pipe is slidably inserted into the sleeve, and the sleeve seals the through hole. The bottom end of the water outlet pipe slidably penetrates through the bottom wall of the smoke exhaust housing. A sputtering disc is fixedly arranged at the bottom of the smoke exhaust housing, and the water outlet pipe is aligned with the sputtering disc. The infrared thermometer is located obliquely above the sputtering disc.

[0016] Furthermore, the exhaust fan, the electromagnetic plate, the smoke alarm and the infrared thermometer are all electrically connected to an external terminal device.

[0017] The beneficial effects achieved by the present invention with the above structure are as follows:

[0018] 1. Through the cooperation of the smoke alarm and the infrared thermometer provided in the present invention, the infrared thermometer can timely monitor the temperature change of the fire ignition point, and thus can monitor the occurrence of a fire in the first time, and feed the data back to the external terminal device, and then control the exhaust fan to start sucking, so that the smoke generated in the initial stage of the fire enters the cooling cylinder through the air inlet, the first ventilation hole and the second ventilation hole. The smoke approaches and concentrates at the smoke alarm, and then the smoke alarm alarms the fire in time.

[0019] 2. Through the cooperation of the protection mechanism and the water spraying mechanism, the present invention utilizes the cooling effect of the water cycle to cool and protect the surroundings of the smoke alarm and the infrared thermometer, preventing high temperature from damaging the smoke alarm and the infrared thermometer, reducing the use cost, and at the same time being able to discharge the thick smoke generated by the fire outdoors and spray water on the fire to extinguish it. When in use, the closed cover completely blocks all the ventilation holes II on the cooling cylinder. At this time, the smoke alarm is also blocked inside the cooling cylinder. At this time, the outside smoke no longer enters the cooling cylinder, avoiding damage to the smoke alarm caused by heat accumulation. At the same time, there is continuously water flowing through the spiral water pipe to cool the cooling cylinder, and then cool the smoke alarm inside the cooling cylinder, further avoiding damage to the smoke alarm caused by high temperature.

[0020] When the piston plate rises, it drives the outlet pipe to rise. The through hole on the outlet pipe moves above the sleeve. At this time, the water in the piston cylinder enters the outlet pipe through the through hole and is discharged. The sprayed water splashes on the sputtering plate and splashes around to extinguish the fire. Through the continuously flowing water inside the piston cylinder, the piston cylinder is cooled. The piston cylinder is made of aluminum alloy material with good thermal conductivity, and then heat exchange cooling is carried out on the space between the piston cylinder and the smoke exhaust housing, and then the infrared thermometer is cooled to avoid damage to the infrared thermometer caused by high temperature. In order to increase the cooling effect, aluminum alloy fin plates are also welded on the outer wall of the piston cylinder to improve the heat exchange effect.

[0021] 3. The present invention realizes the downward movement and reset of the outlet pipe through the cooperation of the electromagnetic plate and the limiting plate on the buckle unit. When the fire is over, the electromagnetic plate is energized to generate magnetism, and then a suction force is generated on the iron limiting plate. The limiting plate moves to the left, driving the sliding rod to move to the left, driving the clamping strip to move to the left, and leaving the clamping groove, releasing the limit of the ejector rod. At this time, under the resilience of the first spring, the piston plate moves downward, driving the ejector rod to move downward, driving the outlet pipe to move downward, and blocking the through hole with the sleeve again to prepare for the next spraying operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention. In the drawings:

[0023] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0024] Figure 2 is a top view of the present invention;

[0025] Figure 3 is a three-dimensional structural schematic diagram of another perspective of the present invention;

[0026] Figure 4 isFigure 2 Schematic cross-sectional view at A-A;

[0027] Figure 5 Partial sectional view of the present invention;

[0028] Figure 6 Partial sectional view of the present invention from another perspective;

[0029] Figure 7 Schematic three-dimensional structure view of the protection mechanism of the present invention;

[0030] Figure 8 Schematic cross-sectional view of the protection mechanism of the present invention;

[0031] Figure 9 Partial sectional view of the water spraying mechanism of the present invention;

[0032] Figure 10 Schematic cross-sectional view of the water spraying mechanism of the present invention;

[0033] Figure 11 is Figure 10 Enlarged view at A;

[0034] Figure 12 is Figure 10 Enlarged view at B.

[0035] Wherein, 1, smoke exhaust housing; 2, smoke alarm; 3, protection mechanism; 4, water spraying mechanism; 5, partition board; 6, air inlet; 7, infrared thermometer; 8, sputtering disc; 31, cooling cylinder; 32, annular channel; 33, ventilation hole one; 34, ventilation hole two; 35, smoke exhaust fan; 36, smoke exhaust port; 37, spiral water pipe; 38, water inlet pipe; 41, lifting plate; 42, closed cover; 43, water pressure driving component, including 431, piston cylinder; 432, support rod; 433, piston plate; 434, ejector rod; 435, spring one; 436, connecting pipe; 437, buckle unit, including 4371, fixed cylinder; 4372, clamping bar; 4373, sliding rod; 4374, spring two; 4375, limiting plate; 4376, clamping groove; 438, electromagnetic plate; 439, water outlet pipe; 4310, sleeve; 4311, through hole. Detailed implementation manner

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0037] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0038] As Figures 1 - 12 shown, an alarm device for thermal control in a thermal power plant according to the present invention includes a smoke exhaust housing 1, a smoke alarm 2, a protection mechanism 3 and a water spraying mechanism 4. The smoke exhaust housing 1 is cylindrical, and its top is open. A partition 5 is horizontally and fixedly arranged inside the smoke exhaust housing 1. The protection mechanism 3 is arranged at the bottom of the partition 5. The smoke alarm 2 is fixedly arranged at the bottom of the partition 5 and is located inside the protection mechanism 3. The water spraying mechanism 4 is arranged inside the smoke exhaust housing 1 and is located below the protection mechanism 3. The water spraying mechanism 4 is connected to the protection mechanism 3. An air inlet 6 is opened on the circumferential wall of the smoke exhaust housing 1. The air inlet 6 is communicated with the protection mechanism 3 and the smoke alarm 2. An infrared thermometer 7 is installed through the bottom wall inside the smoke exhaust housing 1.

[0039] As Figures 1 - 12 shown, the protection mechanism 3 includes a cooling cylinder 31 and an annular channel 32. The cooling cylinder 31 is fixedly arranged at the bottom of the partition 5, and the bottom end of the cooling cylinder 31 is open. The smoke alarm 2 is located inside the cooling cylinder 31. The annular channel 32 is fixedly arranged at the bottom of the partition 5 and is sleeved outside the cooling cylinder 31. Air permeation holes one 33 are opened on both annular inner walls of the annular channel 32, and the air permeation holes one 33 are located on the left and right sides of the cooling cylinder 31. Air permeation holes two 34 are distributed on the annular inner wall of the cooling cylinder 31. The air inlet 6 is located around the annular channel 32. The water spraying mechanism 4 is connected to the cooling cylinder 31.

[0040] Working principle: The top opening of the smoke exhaust housing 1 is connected to the external smoke exhaust pipe, enabling the thick smoke generated by the fire to be discharged outdoors from the power plant thermal control equipment through the external smoke exhaust pipe. At the same time, through the cooperation of the smoke alarm 2 and the infrared temperature detector 7, when a fire starts, the temperature at the ignition point rises and smoke begins to be generated. In the initial stage of the fire, the smoke concentration is small and the diffusion area is also small. Therefore, it is difficult for the smoke alarm 2 to detect the occurrence of the fire in a timely manner. At this time, by setting the infrared temperature detector 7, the temperature change at the ignition point can be detected in a timely manner, and thus the occurrence of the fire can be detected at the first time. When the infrared temperature detector 7 detects the occurrence of the fire, it feeds the data back to the external terminal device, and then controls the smoke exhaust fan 35 to start sucking, so that the smoke generated in the initial stage of the fire enters the cooling cylinder 31 through the air inlet 6, the first ventilation hole 33 and the second ventilation hole 34. The smoke approaches and concentrates at the smoke alarm 2, and then the smoke alarm 2 alarms for the fire. In addition, through the cooperation of the protection mechanism 3 and the water spraying mechanism 4, using the cooling effect of the water cycle, the surroundings of the smoke alarm 2 and the infrared temperature detector 7 are cooled and protected to prevent high temperature from damaging the smoke alarm 2 and the infrared temperature detector 7, reducing the use cost. At the same time, the thick smoke generated by the fire can be discharged outdoors, and water can be sprayed on the fire to extinguish it.

[0041] As Figures 1 - 12 shown, the protection mechanism 3 further includes a smoke exhaust fan 35. The smoke exhaust fan 35 is fixedly arranged on the top of the partition plate 5. A smoke exhaust port 36 is opened on the partition plate 5, and the smoke exhaust port 36 is communicated with the top of the annular channel 32.

[0042] By starting the smoke exhaust fan 35, negative pressure is generated inside the smoke exhaust housing 1. The smoke generated by the fire diffuses into the cooling cylinder 31 through the air inlet 6, the first ventilation hole 33 and the second ventilation hole 34. The smoke approaches and concentrates at the smoke alarm 2, enabling the smoke alarm 2 to quickly give a fire warning. The smoke enters above the smoke exhaust housing 1 through the smoke exhaust port 36, and then is discharged outdoors through the external smoke exhaust pipe connected to the smoke exhaust housing 1. It can not only give a quick warning but also discharge the smoke outdoors, ensuring the safety of the personnel at the fire scene to a certain extent.

[0043] As Figures 1 - 12 shown, the water spraying mechanism 4 includes a lifting plate 41, a closed cover 42 and a water pressure driving component 43. The water pressure driving component 43 is arranged on the inner bottom wall of the smoke exhaust housing 1. The lifting plate 41 is fixedly arranged on the upper part of the water pressure driving component 43. The closed cover 42 is fixedly arranged on the top of the lifting plate 41. The top of the closed cover 42 is open. The closed cover 42 is slidably inserted into the inside of the cooling cylinder 31, and the closed cover 42 blocks the second ventilation hole 34. The smoke alarm 2 enters the closed cover 42.

[0044] Through the cooperation of the arranged water spraying mechanism 4 and the protection mechanism 3, when external water is introduced into the water pressure driving component 43, it drives the water pressure driving component 43 to work, drives the lifting plate 41 to rise, so that the closing cover 42 blocks the second air vent 34 on the cooling cylinder 31. At this time, the smoke alarm 2 is also blocked in the cooling cylinder 31. At this time, external smoke no longer enters the cooling cylinder 31, avoiding damage to the smoke alarm 2 caused by heat accumulation; the remaining smoke in the cooling cylinder 31 will continuously trigger the smoke alarm 2 to alarm, and it will not cause the smoke alarm 2 to stop working due to the blocking of the closing cover 42; after the smoke alarm 2 is blocked, the smoke is discharged through the air inlet 6, the first air vent 33 and the smoke exhaust port 36 in sequence. It should be noted that the first air vent 33 is located on both the left and right sides of the cooling cylinder 31. When the smoke alarm 2 is not blocked, the smoke will pass through the second air vent 34 on the cooling cylinder 31. When the smoke alarm 2 is blocked, the smoke flows in the annular channel 32 and is then discharged through the smoke exhaust port 36.

[0045] As Figures 1 - 12 shown, the water pressure driving component 43 includes a piston cylinder 431 and a support rod 432. The support rod 432 is fixedly arranged on the inner bottom wall of the smoke exhaust housing 1, the piston cylinder 431 is fixedly arranged at the top of the support rod 432, a piston plate 433 is slidably and sealingly arranged inside the piston cylinder 431, a push rod 434 is fixedly arranged at the top of the piston plate 433, the top of the push rod 434 slidably penetrates through the top of the piston cylinder 431, and the lifting plate 41 is fixedly arranged at the top of the push rod 434. The lifting plate 41 is in a disc shape and is slidably adapted to the inside of the smoke exhaust housing 1.

[0046] As Figures 1 - 12 shown, the water pressure driving component 43 further includes a first spring 435, and the first spring 435 abuts between the inner top wall of the piston cylinder 431 and the top of the piston plate 433.

[0047] As Figures 1 - 12 shown, the water pressure driving component 43 further includes a connecting pipe 436. One end of the connecting pipe 436 is communicated with the bottom of the piston cylinder 431. The inner wall of the cooling cylinder 31 is of a hollow structure, and a spiral water pipe 37 is arranged around the inner wall of the cooling cylinder 31. One end of the spiral water pipe 37 is connected with the other end of the connecting pipe 436. A water inlet pipe 38 is penetrated through the inner wall of the smoke exhaust housing 1, and the other end of the spiral water pipe 37 is connected with the water inlet pipe 38. The connecting pipe 436 movably passes through the lifting plate 41.

[0048] As Figures 1 - 12As shown, the water pressure driving component 43 further includes a buckle unit 437. The buckle unit 437 is arranged on the inner top wall of the piston cylinder 431 and is connected to the ejector rod 434. The buckle unit 437 includes a fixed cylinder 4371, a clamping strip 4372, a sliding rod 4373 and a second spring 4374. The fixed cylinder 4371 is fixedly arranged on the inner top wall of the piston cylinder 431 and is located on one side of the ejector rod 434. The clamping strip 4372 is slidably arranged in the fixed cylinder 4371, and one end of it slidably penetrates through the right end of the fixed cylinder 4371. The sliding rod 4373 is slidably penetrated and arranged at the left end of the fixed cylinder 4371. One end of the sliding rod 4373 extends into the fixed cylinder 4371 and is fixedly connected to one end of the clamping strip 4372. A limiting plate 4375 is fixedly arranged at the end of the sliding rod 4373 outside the fixed cylinder 4371. The second spring 4374 is slidably sleeved on the sliding rod 4373 and abuts between the inner wall of the left end of the fixed cylinder 4371 and one end of the clamping strip 4372. The end of the clamping strip 4372 extending out of the fixed cylinder 4371 is an inclined surface end. A clamping groove 4376 is formed on the side wall of the ejector rod 434, and the inclined surface end of the clamping strip 4372 is clamped with the clamping groove 4376.

[0049] Through the arranged water pressure driving component 43, when an external water pump conveys water to the water inlet pipe 38, the water inlet pipe 38 supplies water to the spiral water pipe 37, and then conveys water into the piston cylinder 431 through the connecting pipe 436. The water pressure in the piston cylinder 431 increases, driving the piston plate 433 to move upward. The first spring 435 is compressed. The piston plate 433 drives the ejector rod 434 to move upward. When the ejector rod 434 rises, the buckle unit 437 fixes the ejector rod 434. During use, the side wall of the ejector rod 434 presses against the inclined surface end of the clamping strip 4372, causing the clamping strip 4372 to move to the left, and the second spring 4374 is compressed. When the clamping groove 4376 on the side wall of the ejector rod 434 is aligned with the inclined surface end of the clamping strip 4372, under the resilience of the second spring 4374, the clamping strip 4372 is driven to move to the right and enter the clamping groove 4376. The inclined surface end of the clamping strip 4372 is clamped with the clamping groove 4376 to fix the position of the ejector rod 434 after rising.

[0050] As Figures 1 - 12 shown, the water pressure driving component 43 further includes an electromagnetic plate 438. The electromagnetic plate 438 is fixedly arranged on the inner top wall of the piston cylinder 431 and is located on one side of the limiting plate 4375. The limiting plate 4375 is made of iron material, and the electromagnetic plate 438 attracts the limiting plate 4375.

[0051] After the fire is over, the electromagnetic plate 438 is energized to generate magnetism, thereby generating suction force on the iron limiting plate 4375. The limiting plate 4375 moves to the left, thereby driving the sliding rod 4373 to move to the left, thereby driving the clamping strip 4372 to move to the left and leaving the clamping groove 4376, releasing the limit on the ejector rod 434.

[0052] As Figures 1 - 12As shown, the water pressure driving assembly 43 further includes a water outlet pipe 439. The top end of the water outlet pipe 439 is fixedly arranged at the bottom of the piston plate 433. A sleeve 4310 is provided through the bottom of the piston cylinder 431. A through hole 4311 is formed in the water outlet pipe 439. The water outlet pipe 439 is slidably inserted into the sleeve 4310, and the sleeve 4310 seals the through hole 4311. The bottom end of the water outlet pipe 439 slidably penetrates through the bottom wall of the smoke exhaust housing 1. A sputtering disk 8 is fixedly arranged at the bottom of the smoke exhaust housing 1, and the water outlet pipe 439 is aligned with the sputtering disk 8. The infrared thermometer 7 is located obliquely above the sputtering disk 8. The smoke exhaust fan 35, the electromagnetic plate 438, the smoke alarm 2, and the infrared thermometer 7 are all electrically connected to an external terminal device.

[0053] During specific use, first, the top end of the smoke exhaust housing 1 is connected to an external smoke exhaust pipe. When a fire starts, the temperature at the ignition point rises and smoke begins to be generated. In the initial stage of the fire, the smoke concentration is small and the diffusion area is also small. Therefore, it is difficult for the smoke alarm 2 to detect the occurrence of the fire in a timely manner. At this time, by setting the infrared thermometer 7, the temperature change at the ignition point can be detected in a timely manner, and thus the occurrence of the fire can be detected at the first time. When the infrared thermometer 7 detects the occurrence of the fire, it feeds the data back to the external terminal device, and then controls the smoke exhaust fan 35 to start sucking, so that the smoke generated in the initial stage of the fire enters the cooling cylinder 31 through the air inlet 6, the first ventilation hole 33, and the second ventilation hole 34. The smoke approaches and concentrates at the smoke alarm 2, and then the smoke alarm 2 alarms for the fire.

[0054] When the fire situation further expands to the middle stage of the fire with obvious fire intensity, the smoke density increases, and the infrared thermometer 7 measures that the fire situation has become larger. The external terminal device controls the speed of the smoke exhaust fan 35 to increase, thereby improving the suction efficiency. The smoke enters the external smoke exhaust pipe through the smoke exhaust port 36 on the partition 5 and is discharged outdoors to avoid excessive smoke density in the room. At the same time, due to the worsening of the fire situation, the smoke density increases, and the indoor temperature is too high, the infrared thermometer 7 and the smoke alarm 2 will be at risk of melting or burning, resulting in the infrared thermometer 7 and the smoke alarm 2 being unable to effectively and accurately judge the fire situation. At this time, when the infrared thermometer 7 detects that the external temperature exceeds the predetermined value, the external terminal device controls the external water pump to supply water to the water inlet pipe 38, and the water inlet pipe 38 supplies water to the spiral water pipe 4372 is pressed against the piston cylinder 431, and the piston plate 433 is pressed against the piston cylinder 431. When the piston plate 433 is pressed against the piston cylinder 431, the piston plate 433 is pressed against the piston cylinder 431, and the piston plate 433 is pressed against the piston cylinder 431. When the piston plate 433 is pressed against the piston cylinder 431, the piston plate 433 is pressed against the piston cylinder 431. When the piston plate 433 is pressed against the piston cylinder 431, the piston plate 433 is pressed against the piston cylinder 431. When the piston plate 433 is pressed against the piston cylinder 431, the piston plate 433 is pressed against the piston cylinder 431. When the piston plate 433 is pressed against the piston cylinder 431, the piston plate 433 is pressed against the piston cylinder 431. The movable lifting plate 41 rises, driving the sealing cover 42 to rise, and the sealing cover 42 slides in the cooling cylinder 31 until the sealing cover 42 blocks all the air holes 34 on the cooling cylinder 31, and at this time, the smoke alarm 2 is also blocked in the cooling cylinder 31, and the smoke from the outside no longer enters the cooling cylinder 31, thereby avoiding the accumulation of heat to damage the smoke alarm 2; the smoke remaining in the cooling cylinder 31 will continue to trigger the smoke alarm 2 to alarm, and the smoke alarm 2 will not stop working due to the blocking of the sealing cover 42; at the same time, water continues to flow through the spiral water pipe 37 to cool down the cooling cylinder 31, and then cool down the smoke alarm 2 inside the cooling cylinder 31, further avoiding high temperature from damaging the smoke alarm 2; when the piston plate 433 rises When the water in the piston cylinder 431 is lowered, the water outlet pipe 439 is driven to rise, and the through hole 4311 on the water outlet pipe 439 moves to the top of the sleeve 4310. At this time, the water in the piston cylinder 431 enters the water outlet pipe 439 through the through hole 4311 and is discharged. The sprayed water is sprayed on the sputtering disk 8 and sputters around to extinguish the fire. The water flow continuously flowing inside the piston cylinder 431 cools the piston cylinder 431. The piston cylinder 431 is made of aluminum alloy with good thermal conductivity, and then the space between the piston cylinder 431 and the smoke exhaust shell 1 is cooled by heat exchange, and then the infrared thermometer 7 is cooled to avoid damage to the infrared thermometer 7 caused by high temperature. In order to increase the cooling effect, an aluminum alloy fin plate (not shown in the figure) is welded on the outer wall of the piston cylinder 431 to improve the heat exchange effect.

[0055] After the fire is over, the electromagnetic plate 438 is energized to generate magnetism, thereby generating a suction force on the iron material limiting plate 4375. The limiting plate 4375 moves to the left, thereby driving the sliding rod 4373 to move to the left, and then driving the clamping strip 4372 to move to the left and leave the clamping groove 4376, releasing the limit of the ejector rod 434. At this time, under the resilience of the first spring 435, the piston plate 433 moves downward, thereby driving the ejector rod 434 to move downward, driving the water outlet pipe 439 to move downward, and blocking the through hole 4311 with the sleeve 4310 again, preparing for the next spraying operation.

[0056] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0057] The above shows and describes the basic principles, main features and advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic features of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed claim.

[0058] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An alarm device for thermal control in a thermal power plant, characterized in that: It includes a smoke exhaust housing (1), a smoke alarm (2), a protection mechanism (3) and a water spraying mechanism (4). The smoke exhaust housing (1) is cylindrical and its top is open. A partition plate (5) is horizontally and fixedly arranged inside the smoke exhaust housing (1). The protection mechanism (3) is arranged at the bottom of the partition plate (5). The smoke alarm (2) is fixedly arranged at the bottom of the partition plate (5) and is located inside the protection mechanism (3). The water spraying mechanism (4) is arranged inside the smoke exhaust housing (1) and is located below the protection mechanism (3). The water spraying mechanism (4) is connected to the protection mechanism (3). An air inlet (6) is formed in the circumferential wall of the smoke exhaust housing (1), and the air inlet (6) is communicated with the protection mechanism (3) and the smoke alarm (2). An infrared thermometer (7) is installed through the inner bottom wall of the smoke exhaust housing (1); The water spraying mechanism (4) includes a lifting plate (41), a closed cover (42) and a water pressure driving assembly (43). The water pressure driving assembly (43) is arranged on the inner bottom wall of the smoke exhaust housing (1). The lifting plate (41) is fixedly arranged on the upper part of the water pressure driving assembly (43). The closed cover (42) is fixedly arranged on the top of the lifting plate (41); The water pressure driving assembly (43) includes a piston cylinder (431) and a support rod (432). The support rod (432) is fixedly arranged on the inner bottom wall of the smoke exhaust housing (1). The piston cylinder (431) is fixedly arranged at the top of the support rod (432). A piston plate (433) is slidably and sealingly arranged inside the piston cylinder (431). A top rod (434) is fixedly arranged on the top of the piston plate (433). The top of the top rod (434) slidably penetrates through the top of the piston cylinder (431). The lifting plate (41) is fixedly arranged at the top of the top rod (434). The lifting plate (41) is disc-shaped and is slidably adapted to the inside of the smoke exhaust housing (1); The water pressure driving assembly (43) further includes a buckle unit (437). The buckle unit (437) is arranged on the inner top wall of the piston cylinder (431) and is connected to the top rod (434).

2. The alarm device for thermal control of a thermal power plant according to claim 1, wherein: The protection mechanism (3) includes a cooling cylinder (31) and an annular channel (32). The cooling cylinder (31) is fixedly arranged at the bottom of the partition plate (5), and the bottom end of the cooling cylinder (31) is open. The smoke alarm (2) is located inside the cooling cylinder (31). The annular channel (32) is fixedly arranged at the bottom of the partition plate (5) and is sleeved outside the cooling cylinder (31). Air permeation holes one (33) are formed on both annular inner walls of the annular channel (32), and the air permeation holes one (33) are located on the left and right sides of the cooling cylinder (31). Air permeation holes two (34) are distributed on the annular inner wall of the cooling cylinder (31). The air inlet (6) is located around the annular channel (32). The water spraying mechanism (4) is connected to the cooling cylinder (31).

3. The alarm device for thermal control of a thermal power plant according to claim 2, characterized in that: The protection mechanism (3) further includes a smoke exhaust fan (35). The smoke exhaust fan (35) is fixedly arranged on the top of the partition plate (5). A smoke exhaust port (36) is formed on the partition plate (5), and the smoke exhaust port (36) is communicated with the top of the annular channel (32).

4. The alarm device for thermal control of a thermal power plant according to claim 2, characterized in that: The top of the closed cover (42) is open. The closed cover (42) is slidably inserted into the cooling cylinder (31), and the closed cover (42) blocks the second air vent hole (34). The smoke alarm (2) enters the closed cover (42).

5. The alarm device for thermal control of a thermal power plant according to claim 4, characterized in that: The water pressure driving assembly (43) further includes a first spring (435). The first spring (435) abuts between the inner top wall of the piston cylinder (431) and the top of the piston plate (433).

6. An alarm device for thermal control in a thermal power plant according to claim 5, characterized in that: The water pressure driving assembly (43) further includes a connecting pipe (436). One end of the connecting pipe (436) communicates with the bottom of the piston cylinder (431). The inner wall of the cooling cylinder (31) is of a hollow structure, and a spiral water pipe (37) is arranged around the inner wall of the cooling cylinder (31). One end of the spiral water pipe (37) is connected to the other end of the connecting pipe (436). A water inlet pipe (38) penetrates through the inner wall of the smoke exhaust housing (1). The other end of the spiral water pipe (37) is connected to the water inlet pipe (38). The connecting pipe (436) movably passes through the lifting plate (41).

7. An alarm device for thermal control in a thermal power plant according to claim 6, characterized in that: The buckle unit (437) includes a fixed cylinder (4371), a clamping strip (4372), a sliding rod (4373) and a second spring (4374). The fixed cylinder (4371) is fixedly arranged on the inner top wall of the piston cylinder (431) and is located on one side of the ejector rod (434). The clamping strip (4372) is slidably arranged in the fixed cylinder (4371), and one end of it slidably penetrates through the right end of the fixed cylinder (4371). The sliding rod (4373) is slidably penetrated through the left end of the fixed cylinder (4371). One end of the sliding rod (4373) extends into the fixed cylinder (4371) and is fixedly connected to one end of the clamping strip (4372). A limiting plate (4375) is fixedly arranged at the end of the sliding rod (4373) outside the fixed cylinder (4371). The second spring (4374) is slidably sleeved on the sliding rod (4373) and abuts between the inner wall of the left end of the fixed cylinder (4371) and one end of the clamping strip (4372). The end of the clamping strip (4372) extending out of the fixed cylinder (4371) is an inclined surface end. A clamping groove (4376) is formed on the side wall of the ejector rod (434). The inclined surface end of the clamping strip (4372) is clamped with the clamping groove (4376).

8. An alarm device for thermal control in a thermal power plant according to claim 7, characterized in that: The water pressure driving assembly (43) further includes an electromagnetic plate (438). The electromagnetic plate (438) is fixedly arranged on the inner top wall of the piston cylinder (431) and is located on one side of the limiting plate (4375). The limiting plate (4375) is made of iron material, and the electromagnetic plate (438) attracts the limiting plate (4375).

9. An alarm device for thermal control in a thermal power plant according to any one of claims 5-8, characterized in that: The water pressure driving component (43) further includes a water outlet pipe (439). The top end of the water outlet pipe (439) is fixedly arranged at the bottom of the piston plate (433). A sleeve (4310) is penetrated through the bottom of the piston cylinder (431). A through hole (4311) is formed in the water outlet pipe (439). The water outlet pipe (439) is slidably inserted into the sleeve (4310), and the sleeve (4310) seals the through hole (4311). The bottom end of the water outlet pipe (439) slidably penetrates through the bottom wall of the smoke exhaust housing (1). A sputtering disc (8) is fixedly arranged at the bottom of the smoke exhaust housing (1), and the water outlet pipe (439) is aligned with the sputtering disc (8). The infrared thermometer (7) is located obliquely above the sputtering disc (8).

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