Fire monitor fire extinguishing system detection part double-pipeline parallel fire monitoring system and detection method thereof

Abstract

According to the fire monitor fire extinguishing system detection part double-pipeline parallel fire monitoring system and the detection method thereof, two partition plates are arranged in a shell side by side, a detection cavity is formed between the two partition plates, a detector is installed in the detection cavity, an air inlet hole A is formed in one end of an airflow cavity A, and an air outlet hole A is formed in the other end of the airflow cavity A; an air outlet hole B is formed in the other end of the airflow cavity B; a first detection inlet is formed in the first partition plate close to the first air outlet hole, a second detection inlet is formed in the second partition plate close to the second air outlet hole, a detection outlet is formed in the end of the detection cavity, the filter is installed in the detection cavity between the detection inlet and the detector, and a first splitter plate covering the first sample inlet is arranged on the end plate on the inner side of the first air outlet hole in the longitudinal direction. A splitter plate B covering the sample inlet B is arranged on the end plate on the inner side of the air outlet hole B along the longitudinal direction; according to the monitoring system, the sensitivity of the detection device can be improved, the detection monitoring effect is ensured, the difficulty of manual fire investigation and the troubleshooting speed can be effectively reduced, and the fire occurrence point can be confirmed in time.

Description

Technical Field

[0001] The invention relates to the field of fire protection, and in particular to a double-pipeline parallel fire monitoring system for a detection part of a fire cannon fire extinguishing system and a detection method thereof. Background Art

[0002] The aspirating smoke fire detector is a highly sensitive fire detection device that is widely used in data centers, museums, warehouses and other places that have high requirements for early fire detection. It can actively collect air samples and analyze the smoke concentration in them to achieve early fire detection.

[0003] The principle of an aspirating smoke fire detector is usually: the aspirating fan draws air as samples from different protected areas at the same time through a multi-channel sampling tube made of PVC or steel. The air sample flows into the filter assembly through the duct joint and the fan box to filter out dust particles, and then is sent to the laser detection room to detect whether there are smoke particles in the sampled air, thereby determining the area where the fire has occurred.

[0004] The problems existing in the use of this type of smoke fire detection system are: first, all the air samples drawn by the sampling tube are sucked into the filter assembly and the laser detection chamber. The filtering and detection will produce a large resistance to the air flow, which will then act on the sampling tube to weaken its sampling suction force, which is not conducive to ensuring sufficient suction sampling in the protection area and affecting the detection accuracy. In addition, the concentrated filtration and dust removal of a large number of air samples can easily cause the filter assembly to be blocked in a short time, and it needs to be frequently disassembled for inspection and maintenance, which is not conducive to the continuous and stable operation of the detection system; second, if the sampling tube is blocked or the extraction fan fails, the smoke particles cannot enter the detection device, resulting in the failure of the detection device to detect the fire hazard in advance. If the fault is not eliminated in time, there will be endless troubles; third, the current detection system will connect multiple sampling tubes to increase the coverage of the protection space, but it is impossible to accurately determine which specific sampling tube has a fire, which will increase the difficulty of manual investigation, which is not conducive to timely confirmation of the fire point, and restricts the early detection effect of the fire, which needs to be improved. Summary of the invention

[0005] In order to solve the above problems, the present invention proposes a double-pipeline parallel fire monitoring system for the detection part of a fire cannon fire extinguishing system and a detection method thereof.

[0006] The technical scheme of the present invention is: a double-pipe parallel fire monitoring system for the detection part of a fire cannon fire extinguishing system, comprising a shell with a sealing cover on the upper port, a detector and a filter, a partition A and a partition B are arranged side by side in the middle of the shell along the longitudinal direction, a detection cavity is formed between the two partitions, the detector is installed in the detection cavity, an airflow cavity A is formed between the partition A and the shell, and an airflow cavity B is formed between the partition B and the shell; an air inlet A is provided on the end plate at one end of the airflow cavity A, an air outlet A is provided on the end plate at the other end, and a fan A is installed inside the air inlet A; an air inlet B is provided on the end plate at one end of the airflow cavity B, an air outlet B is provided on the end plate at the other end, and a fan B is installed inside the air inlet B; A detection inlet A is provided on the partition A near the air outlet A, a detection inlet B is provided on the partition B near the air outlet B, a detection outlet is provided on the end plate between the air inlet A and the air inlet B, and the filter is installed in the detection cavity between the two detection inlets and the detector. A diverter plate A covering the sample inlet A is provided on the upper longitudinal portion of the end plate inside the air outlet A, and a diverter plate B covering the sample inlet B is provided on the upper longitudinal portion of the end plate inside the air outlet B.

[0007] Preferably, a speed measuring port is provided on the end plate between the diverter plate A and the diverter plate, a diverter channel A is formed between the diverter plate A and the partition plate A, one side of the speed measuring port is connected to the diverter channel A, the diverter channel B formed between the diverter plate B and the partition plate B is connected, the other side of the speed measuring port is connected to the diverter channel B, and an airflow sensor is installed in the middle of the speed measuring port through a bracket.

[0008] Preferably, a V-shaped guide plate is connected between the ends of the partition A and the partition B, and the tip of the V-shaped guide plate corresponds to the center of the speed measuring port.

[0009] Preferably, the length dimension of diverter plate A is greater than half of the length dimension of partition plate A, and the length dimension of diverter plate B is greater than half of the length dimension of partition plate B.

[0010] Preferably, the air inlet end of the shell is provided with an integrated joint, which includes a joint tube A and a joint tube B arranged side by side, the joint tube A is connected to the air inlet hole A, the joint tube B is connected to the air inlet hole B, the middle part of the joint tube A is provided with a reflux tube A connected to the detection outlet, and the middle part of the joint tube B is provided with a reflux tube B connected to the detection outlet.

[0011] Preferably, a docking plate is connected between the inner ports of the connector pipe A, connector pipe B, return pipe A and return pipe B, and the integrated connector is fixedly connected to the end plate of the shell through the docking plate.

[0012] A double-pipeline parallel fire monitoring system for detecting part of a fire cannon fire extinguishing system and a detection method thereof, comprising the following steps: ① Fan A and Fan B work synchronously, generating suction force on their respective sampling tubes through joint tube A and joint tube B respectively. The suction force in the two joint tubes will simultaneously act on the detection chamber through return tube A and return tube B, forming negative pressure in the detection chamber; ② The air sample collected by the sampling tube is sucked into the air flow chamber A and the air flow chamber B at the same time; most of the air samples in the air flow chamber A will be directly discharged from the air outlet A. Under the action of the splitter plate, a certain proportion of the air samples will be diverted and introduced into the split channel A, and the air samples in the air flow chamber B will be diverted and introduced into the split channel B in the same way; ③ The negative pressure generated by the detection chamber sucks in the air samples in the shunt channel A and the shunt channel B at the same time. The filter filters out the dust in the air sample, and then enters the detector for particle detection. At the same time, part of the airflow in the two shunt channels will be discharged from the speed measuring port, and the airflow velocity will be monitored in real time through the speed measuring sensor in the speed measuring port;

[0013] ④When the detector detects a particle signal, turn off Fan A. If the particle signal disappears, it is determined that a fire has occurred in the area covered by the sampling tube corresponding to Fan A; ⑤ When the detector detects a particle signal, the particle signal still exists when Fan A is turned off, then Fan A is turned on and Fan B is turned off, the particle signal disappears, and it is determined that a fire has occurred in the area covered by the sampling tube corresponding to Fan B; ⑥ When the detector detects a particle signal, the particle signal still exists when Fan A is turned off, then Fan A is turned on and Fan B is turned off, the particle signal still exists, and it is determined that fire occurs in the areas covered by the sampling tubes corresponding to Fan A and Fan B;

[0014] ⑧When the speed sensor detects that the airflow velocity is significantly reduced, turn off Fan A. If the airflow velocity does not change significantly further, it means that the sampling tube corresponding to Fan A is blocked; ⑨ When the speed sensor detects that the airflow velocity is significantly reduced, the fan A is turned off, and the airflow velocity is further significantly reduced, it means that the sampling tube corresponding to the fan B is blocked; ⑩ When the speed sensor detects that the airflow velocity is significantly reduced, and there is no significant change in the airflow velocity when Fan A and Fan B are alternately turned on and off, it means that the sampling tubes corresponding to Fan A and Fan B are blocked.

[0015] Preferably, before detecting and judging the fire area and monitoring and judging the airflow in the sampling tube, the sensors provided by Fan A and Fan B are used to determine whether they are operating normally, and corresponding detection and judgment are performed after ensuring that the fans are operating normally.

[0016] The beneficial technical effects of the present invention are: (1) The monitoring system forms a diversion channel on one side of the main channel by setting a diversion plate in the shell. Part of the extracted air samples will enter the detection chamber from the diversion channel for dust filtration and particulate matter detection, and most of them will be directly discharged from the exhaust hole. The air samples can be detected normally while ensuring their smooth flow, avoiding the phenomenon that the sampling suction force at the sampling tube is weakened and the protection area cannot be fully sampled. At the same time, it can also effectively reduce the air flow at the filter to avoid it from being blocked for a short time, without frequent disassembly and maintenance, which is conducive to the continuous and stable operation of the detection device.

[0017] (2) The negative pressure generated by the fan suction at the joint pipe of the monitoring system can act on the detection chamber through the return pipe, so that negative pressure will also be generated in the detection chamber to produce suction force on the air sample being detected, so that the air sample can smoothly and quickly enter the detection chamber from the diversion channel for filtration and detection, which is beneficial to improve the sensitivity of the detection device and ensure the detection and monitoring effect.

[0018] (3) The monitoring system's diversion channel guides a portion of the incoming air sample to be discharged from the velocity measurement port. The internal velocity sensor detects whether there is airflow passing through. If a malfunction causes the air sample to fail to enter the detection device normally, the velocity sensor can detect it and send out an alarm signal to eliminate the fault in time and avoid fire hazards caused by fire detection failure.

[0019] (4) The monitoring system is designed with a dual-tube synchronous sampling structure to improve the gas protection coverage. The detection method designed for the monitoring system can accurately determine which sampling tube has extracted fire particles and which sampling tube is blocked during the fire monitoring process. This effectively reduces the difficulty of manual fire investigation and the speed of troubleshooting, facilitates timely confirmation of the fire point, and ensures the accuracy of fire monitoring detection and the stability of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is one of the three-dimensional structural schematic diagrams of the present invention; Figure 2 yes Figure 1 AA section structural diagram; Figure 3 yes Figure 2 BB-direction cross-sectional structural diagram; Figure 4 It is a schematic diagram of the three-dimensional structure of the present invention without the sealing cover; Figure 5 This is the second schematic diagram of the three-dimensional structure of the present invention; Figure 6 It is a schematic diagram of the three-dimensional structure of the present invention without the integrated joint; Figure 7 It is a three-dimensional structural schematic diagram of the integrated joint of the present invention; Figure 8 and Fig. 9 It is a product diagram of the present invention.

[0021] In the figure, 1. shell, 11. detection chamber, 111. partition A, 112. partition B, 113. detection inlet A, 114. detection inlet B, 115. detection outlet, 12. air flow chamber A, 121. air inlet A, 122. air outlet A, 13. air flow chamber B, 131. air inlet B, 132. air outlet B, 14. diversion channel A, 141. diversion plate A, 15. diversion channel B, 151. diversion plate B, 16. speed measuring port, 161. bracket, 162. air flow sensor, 163. wire, 17. V-shaped guide plate, 18. fan A, 19. fan B, 2. detector, 3. filter, 41. joint pipe A, 42. joint pipe B, 43. return pipe A, 44. return pipe B, 45. docking plate, 5. sealing cover. DETAILED DESCRIPTION

[0022] Embodiment 1, see attached Figure 1-7 A fire monitor fire extinguishing system detection part double-pipe parallel fire monitoring system, including a shell 1 with a sealing cover 5 at the upper port, a detector 2 and a filter 3, the shell 1 is made of square plastic material, the sealing cover 5 is fixedly connected to the shell 1 by screws, and a convex rib is provided on the bottom surface of the sealing cover 5, a card slot is formed between the convex ribs, the card slot is matched and clamped on the upper port of the shell 1 to improve the sealing effect, a partition A 111 and a partition B 112 are arranged side by side in the middle of the shell 1 along the longitudinal direction, a detection cavity 11 is formed between the two partitions, the detector 2 is installed in the detection cavity 11, an airflow cavity A 12 is formed between the partition A 111 and the shell 1, an airflow cavity B 13 is formed between the partition B 112 and the shell 1, and the two partitions are arranged on the upper port of the shell 1. The ends are respectively connected to the two end plates of the shell 1; an air inlet hole A 121 is provided on the end plate at one end of the air flow chamber A 12, and an air outlet hole A 122 is provided on the end plate at the other end, the air inlet hole A 121 and the air outlet hole A 122 are arranged opposite to each other, and a fan A 18 is installed on the inner side of the air inlet hole A 121; an air inlet hole B 131 is provided on the end plate at one end of the air flow chamber B 13, and an air outlet hole B 132 is provided on the end plate at the other end, the air inlet hole B 131 and the air outlet hole B 132 are arranged opposite to each other, and a fan B 19 is installed on the inner side of the air inlet hole B 131; a transverse partition is provided on the upper part of the detection chamber 11, and the detector 2 and the filter 3 are fixed between the transverse partitions to improve the assembly stability of the detector 2 and the filter 3 in the detection chamber 11.

[0023] A detection inlet A 113 is provided on the partition A 111 near the air outlet A 122, and a detection inlet B 114 is provided on the partition B 112 near the air outlet B 132. The detection inlet is a long hole arranged along the width direction of the partition. A detection outlet 115 is provided on the end plate between the air inlet A 121 and the air inlet B 131. The air sample is sucked into the detection cavity 11 from the detection inlet and discharged from the detection outlet 115 after passing through the particle detector 2. The filter 3 is installed in the detection cavity 11 between the two detection inlets and the detector 2. The filter 3 is used to filter out dust in the air sample to prevent the dust from affecting the detection accuracy of the particle detector 2. A diverter plate A 141 covering the sample inlet A is provided in the longitudinal direction on the upper end plate inside the air outlet A 122, and a diverter plate B 151 covering the sample inlet B is provided in the longitudinal direction on the upper end plate inside the air outlet B 132. The diverter plate and the partition are arranged parallel to each other.

[0024] A velocity measuring port 16 is provided on the end plate between the diverter plate A 141 and the diverter plate, a diverter channel A 14 is formed between the diverter plate A 141 and the partition A 111, one side of the velocity measuring port 16 is connected to the diverter channel A 14, the diverter channel B 15 formed between the diverter plate B 151 and the partition B 112 is connected, the other side of the velocity measuring port is connected to the diverter channel B 15, an airflow sensor 162 is installed in the middle of the velocity measuring port 16 through a bracket 161, a wiring port is provided at the upper end of the velocity measuring port 16, a wire 163 of the sensor is introduced from the wiring port and connected to the airflow sensor 162; a part of the air sample guided into the two diverter channels is discharged from the velocity measuring port 16, and the internal velocity measuring sensor detects whether there is airflow passing through. If a fault occurs and the air sample fails to enter the detection device normally, the velocity measuring sensor can detect and send an alarm signal, eliminate the fault in time, and avoid the fire hazard caused by fire detection failure.

[0025] A V-shaped guide plate 17 is connected between the ends of partition A 111 and partition B 112. The tip of the V-shaped guide plate 17 corresponds to the center of the speed measuring port 16. The V-shaped guide plate 17 is used to expand the coverage area of ​​the end of the diversion channel. The speed measuring port 16 is designed to be smaller in size so that it can be connected to the two diversion channels respectively. The small-sized speed measuring port 16 can effectively increase the speed of the airflow and improve the monitoring sensitivity of the speed sensor.

[0026] The length of the diverter plate A 141 is greater than half of the length of the partition plate A 111, and the length of the diverter plate B 151 is greater than half of the length of the partition plate B 112. There is a suitable distance between the entrance of the diverter channel and the fan to ensure that a certain proportion of air samples can smoothly enter the diverter channel.

[0027] An integrated joint is provided at the air inlet end of the shell 1, and the integrated joint includes a joint tube A 41 and a joint tube B 42 arranged side by side. The joint tube A 41 is connected to the air inlet hole A 121, and the joint tube B 42 is connected to the air inlet hole B 131. The inner end of the joint tube is provided with a tapered expansion section to increase the suction area of ​​the end of the joint tube and enhance the sampling suction force of the joint tube and the sampling tube. A reflux tube A 43 connected to the detection outlet 115 is provided in the middle of the joint tube A 41, and a reflux tube B 44 connected to the detection outlet 115 is provided in the middle of the joint tube B 42.

[0028] Negative pressure will be generated at the joint pipe due to fan suction, and the negative pressure will act on the detection chamber 11 through the reflux pipe. Negative pressure will be generated in the detection chamber 11, and the air sample can be smoothly and quickly sucked into the detection chamber 11 from the diversion channel for filtration and detection, which is beneficial to improve the sensitivity of the detection device and ensure the detection and monitoring effect.

[0029] A docking plate 45 is connected between the inner ports of the connector pipe A 41, the connector pipe B 42, the return pipe A 43 and the return pipe B 44, and the integrated connector is fixedly connected to the end plate of the shell 1 through the docking plate 45, and the connector pipe is fixedly connected to the end plate A through the docking plate 45. This integrated structure is convenient for disassembly, maintenance and assembly of the connector pipe and the return pipe. A large circular hole corresponding to the connector pipe and a small circular hole corresponding to the return pipe are provided on the docking plate 45, and sealing gaskets are provided at the large circular hole and the small circular hole to ensure the airtightness of the device.

[0030] Embodiment 2, see attached Figure 1-7 , a double-pipeline parallel fire monitoring system and a detection method for a fire cannon fire extinguishing system detection part, the detection method steps are as follows: ① Fan A 18 and Fan B 19 work synchronously, generating suction force on their respective sampling tubes through joint tube A 41 and joint tube B 42 respectively. The suction force in the two joint tubes will simultaneously act on the detection chamber 11 through the return tube A 43 and the return tube B 44, forming a negative pressure in the detection chamber 11; ② The air sample collected by the sampling tube is sucked into the air flow chamber A 12 and the air flow chamber B 13 at the same time; most of the air sample in the air flow chamber A 12 will be directly discharged from the air outlet A 122, and under the action of the diverter plate, a certain proportion of the air sample will be diverted and introduced into the diverter channel A 14, and the air sample in the air flow chamber B 13 will be diverted and introduced into the diverter channel B 15 in the same way; ③ The negative pressure generated by the detection chamber 11 sucks in the air samples in the shunt channel A 14 and the shunt channel B 15 at the same time, and the filter 3 filters out the dust in the air sample, and then enters the detector 2 for particle detection. At the same time, part of the airflow in the two shunt channels will be discharged from the speed measuring port 16, and the airflow velocity is monitored in real time through the speed measuring sensor in the speed measuring port 16;

[0031] ④ When the detector 2 detects a particle signal, the fan A 18 is turned off. If the particle signal disappears, it is determined that a fire occurs in the area covered by the sampling tube corresponding to the fan A 18; ⑤ When the detector 2 detects the particle signal, the particle signal still exists when the fan A 18 is turned off, then the fan A 18 is turned on and the fan B 19 is turned off, the particle signal disappears, and it is determined that a fire occurs in the area covered by the sampling tube corresponding to the fan B 19; ⑥ When the detector 2 detects the particle signal, the particle signal still exists when the fan A 18 is turned off, then the fan A 18 is turned on and the fan B 19 is turned off, and the particle signal still exists, and it is determined that fire occurs in the sampling tube coverage area corresponding to the fan A 18 and the fan B 19;

[0032] ⑧ When the speed sensor detects that the airflow velocity is significantly reduced, the fan A 18 is turned off. If the airflow velocity does not change significantly further, it means that the sampling tube corresponding to the fan A 18 is blocked; ⑨ When the speed sensor detects that the airflow velocity is significantly reduced, the fan A 18 is turned off, and the airflow velocity is further significantly reduced, it means that the sampling tube corresponding to the fan B 19 is blocked; ⑩ When the speed sensor detects that the air flow velocity is significantly reduced, and there is no significant change in the air flow velocity when alternately turning on and off Fan A 18 and Fan B 19, it means that the sampling tubes corresponding to Fan A 18 and Fan B 19 are blocked.

[0033] This method can accurately determine which sampling tube has sampled fire particles, and can determine which sampling tube is blocked during the fire monitoring process, effectively reducing the difficulty of manpower fire investigation and troubleshooting speed, facilitating timely confirmation of the fire occurrence point, and ensuring the accuracy of fire monitoring detection and the stability of operation.

[0034] Before detecting and judging the fire area and monitoring and judging the airflow in the sampling tube, first use the sensors provided by fan A 18 and fan B 19 to determine whether they are operating normally. After ensuring that the fans are operating normally, corresponding detection and judgment are performed to avoid the accuracy of monitoring and judgment being affected by factors such as fan failure.

Claims

1. A dual-pipeline parallel fire monitoring system for the detection part of a fire monitor fire extinguishing system, comprising a housing with a sealing cover on the upper port, a detector and a filter, characterized in that: A partition A and a partition B are arranged side by side in the middle of the shell in the longitudinal direction, a detection cavity is formed between the two partitions, the detector is installed in the detection cavity, an airflow cavity A is formed between the partition A and the shell, and an airflow cavity B is formed between the partition B and the shell; an air inlet A is provided on the end plate at one end of the airflow cavity A, an air outlet A is provided on the end plate at the other end, and a fan A is installed inside the air inlet A; an air inlet B is provided on the end plate at one end of the airflow cavity B, an air outlet B is provided on the end plate at the other end, and a fan B is installed inside the air inlet B; A detection inlet A is provided on the partition A near the air outlet A, a detection inlet B is provided on the partition B near the air outlet B, a detection outlet is provided on the end plate between the air inlet A and the air inlet B, and the filter is installed in the detection cavity between the two detection inlets and the detector. A diverter plate A covering the sample inlet A is provided on the upper longitudinal portion of the end plate inside the air outlet A, and a diverter plate B covering the sample inlet B is provided on the upper longitudinal portion of the end plate inside the air outlet B.

2. According to claim 1, a fire monitor fire extinguishing system detection part double-pipeline parallel fire monitoring system is characterized by: A speed measuring port is provided on the end plate between the diverter plate A and the diverter plate, a diverter channel A is formed between the diverter plate A and the partition plate A, one side of the speed measuring port is connected to the diverter channel A, the diverter channel B formed between the diverter plate B and the partition plate B is connected, the other side of the speed measuring port is connected to the diverter channel B, and an airflow sensor is installed in the middle of the speed measuring port through a bracket.

3. A fire monitoring system for the detection part of a fire monitor fire extinguishing system according to claim 2, characterized in that: A V-shaped guide plate is connected between the ends of the partition plate A and the partition plate B, and the tip of the V-shaped guide plate corresponds to the center of the speed measuring port.

4. A fire monitoring system for the detection part of a fire monitor fire extinguishing system according to claim 1, characterized in that: The length dimension of the diverter plate A is greater than half of the length dimension of the partition plate A, and the length dimension of the diverter plate B is greater than half of the length dimension of the partition plate B.

5. According to claim 1, a fire monitor fire extinguishing system detection part double-pipeline parallel fire monitoring system is characterized by: An integrated joint is provided at the air inlet end of the shell, and the integrated joint includes a joint tube A and a joint tube B arranged side by side, the joint tube A is connected to the air inlet A, and the joint tube B is connected to the air inlet B. A reflux tube A connected to the detection outlet is provided in the middle of the joint tube A, and a reflux tube B connected to the detection outlet is provided in the middle of the joint tube B.

6. A fire monitoring system for the detection part of a fire cannon fire extinguishing system according to claim 5, characterized in that: A docking plate is connected between the inner ports of the joint pipe A, the joint pipe B, the return pipe A and the return pipe B, and the integrated joint is fixedly connected to the end plate of the shell through the docking plate.

7. A double-pipeline parallel fire monitoring system for the detection part of a fire cannon extinguishing system and a detection method thereof according to any one of claims 1 to 6, Its characteristics include the following steps: ① Fan A and Fan B work synchronously, generating suction force on their respective sampling tubes through joint tube A and joint tube B respectively. The suction force in the two joint tubes will simultaneously act on the detection chamber through return tube A and return tube B, forming negative pressure in the detection chamber; ② The air sample collected by the sampling tube is sucked into the air flow chamber A and the air flow chamber B at the same time; most of the air samples in the air flow chamber A will be directly discharged from the air outlet A. Under the action of the splitter plate, a certain proportion of the air samples will be diverted and introduced into the split channel A, and the air samples in the air flow chamber B will be diverted and introduced into the split channel B in the same way; ③ The negative pressure generated by the detection chamber sucks in the air samples in the shunt channel A and the shunt channel B at the same time. The filter filters out the dust in the air sample, and then enters the detector for particle detection. At the same time, part of the airflow in the two shunt channels will be discharged from the speed measuring port, and the airflow velocity will be monitored in real time through the speed measuring sensor in the speed measuring port; Fire area detection and judgment ④When the detector detects a particle signal, turn off Fan A. If the particle signal disappears, it is determined that a fire has occurred in the area covered by the sampling tube corresponding to Fan A; ⑤ When the detector detects a particle signal, the particle signal still exists when Fan A is turned off, then Fan A is turned on and Fan B is turned off, the particle signal disappears, and it is determined that a fire has occurred in the area covered by the sampling tube corresponding to Fan B; ⑥ When the detector detects a particle signal, the particle signal still exists when Fan A is turned off, then Fan A is turned on and Fan B is turned off, the particle signal still exists, and it is determined that fire occurs in the areas covered by the sampling tubes corresponding to Fan A and Fan B; Sampling tube airflow monitoring and judgment ⑧When the speed sensor detects that the airflow velocity is significantly reduced, turn off Fan A. If the airflow velocity does not change significantly further, it means that the sampling tube corresponding to Fan A is blocked; ⑨ When the speed sensor detects that the airflow velocity is significantly reduced, the fan A is turned off, and the airflow velocity is further significantly reduced, it means that the sampling tube corresponding to the fan B is blocked; ⑩ When the speed sensor detects that the airflow velocity is significantly reduced, and there is no significant change in the airflow velocity when Fan A and Fan B are alternately turned on and off, it means that the sampling tubes corresponding to Fan A and Fan B are blocked.

8. The detection method of the double-pipeline parallel fire monitoring system of the detection part of the fire monitor fire extinguishing system according to claim 7 is characterized by: Before detecting and judging the fire area and monitoring and judging the airflow in the sampling tube, first use the sensors provided by Fan A and Fan B to determine whether they are operating normally. After ensuring that the fans are operating normally, perform corresponding detection and judgment.

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