High-sensitivity fire-fighting detection system for existing building reconstruction project
By introducing a highly sensitive fire detection system in old buildings and using aspirating smoke detectors and environmental sensors to adjust wind speed, the fire safety hazards of old buildings have been resolved, early fire detection and rapid response have been achieved, and the fire safety level of existing buildings has been improved.
Patent Information
- Application Number
- CN202422585313.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-24
- Publication Date
- 2025-09-05
- Estimated Expiration
- 2034-10-24
AI Technical Summary
Old existing buildings have hidden dangers in fire safety, and existing technologies cannot effectively improve their fire protection capabilities, especially during building renovations, when they cannot meet the consistency requirements of new and old standards.
A high-sensitivity fire detection system is designed, including a smoke sensor unit, an auxiliary sensor unit, a detection host, and a fire alarm system. It uses an aspirating smoke detector and a wind speed detection unit, combined with an environmental sensor to adjust the wind speed, to improve the accuracy and response speed of fire detection.
It can detect fire earlier and faster in the early stages of a fire, reduce false alarms, improve fire safety response time, adapt to various environments, be economical and practical, and be suitable for the renovation of old buildings.
Smart Images
Figure CN223308668U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of fire protection reconstruction of existing buildings, in particular to a high-sensitivity fire protection detection system used in reconstruction projects of existing buildings. Background Art
[0002] Due to a long-term lack of maintenance and management, older, existing buildings often present safety hazards, particularly in terms of fire safety. Currently, with urban development and population growth, fire safety issues in older, existing buildings are becoming increasingly prominent and require urgent resolution. Therefore, this patent aims to improve fire safety levels in older, existing buildings through fire protection retrofits, thereby protecting the lives and property of the public.
[0003] In the context of the country's vigorous promotion of urban renewal, for some renovation projects, the buildings are very old, the civil engineering conditions have been formed, some fire protection requirements can no longer meet the current building fire protection requirements or the new and old standards are inconsistent, and the existing buildings can no longer be changed. On this basis, we need to design some early fire prevention measures to make up for the deficiencies in fire protection in the renovated buildings and improve fire safety. Utility Model Content
[0004] The purpose of this utility model is to provide a high-sensitivity fire detection system for existing building renovation projects to address the above-mentioned shortcomings, thereby solving the problem of fire safety in existing buildings that cannot be changed.
[0005] The utility model is realized by the following scheme:
[0006] A high-sensitivity fire detection system for existing building renovation projects includes at least a smoke sensor, an auxiliary sensing unit, a detection host and a fire alarm system. The detection host is arranged on the middle floor of the building to be renovated, and the smoke sensor and the auxiliary sensing unit are respectively arranged along each floor of the building to be renovated. The detection host is provided with an aspirating smoke detector, and the fan of the aspirating smoke detector is also connected to a wind speed detection unit, and the wind speed detection unit is connected to the detection host; the sensing unit is connected to the aspirating smoke detector, and the auxiliary sensing unit is connected to the detection host; and the fire alarm system is connected to the detection host.
[0007] Based on the above-mentioned structure of a high-sensitivity fire detection system for existing building renovation projects, the smoke sensing part is a smoke sampling tube and a smoke sampling hole. The smoke sampling tube is arranged along the rooms and passages of the current floor, and the smoke sampling holes are arranged along the rooms of the current floor, and are arranged in multiple numbers at the passages of the current floor.
[0008] Based on the above structure of a high-sensitivity fire detection system for existing building renovation projects, the auxiliary sensing part is an environmental detector, which is located at the center of the current floor, and there is one environmental detector on the current floor.
[0009] Based on the above-mentioned structure of a high-sensitivity fire detection system for existing building renovation projects, the detection host is provided with a first main line, a second main line and an auxiliary cable, the first main line and the second main line are respectively connected to the aspirating smoke detector on the detection host, the first main line extends upward to the top floor, the first main line is respectively connected to the smoke sensing part of each floor, the second main line extends downward to the bottom floor, the second main line is respectively connected to the smoke sensing part of each floor, and the auxiliary cable is connected to the detection host.
[0010] Based on the structure of the above-mentioned high-sensitivity fire detection system for existing building renovation projects, the first main line, the second main line and the auxiliary cables are arranged in the elevator shaft.
[0011] Based on the structure of the above-mentioned high-sensitivity fire detection system for existing building renovation projects, the sum of the lengths of the first main line and the second main line is not more than 200m, and the length of the smoke sampling pipe on each floor is not more than 100m.
[0012] Based on the structure of the above-mentioned high-sensitivity fire detection system for existing building renovation projects, the number of smoke sampling holes on the smoke sampling tube is no more than 25, and the number of smoke sampling holes on all floors is no more than 100.
[0013] Based on the structure of the above-mentioned high-sensitivity fire detection system for existing building renovation projects, the protection area of the smoke sampling hole is the same as the protection area of the traditional point-type smoke fire detector.
[0014] Based on the structure of the above-mentioned high-sensitivity fire detection system for existing building renovation projects, the wind speed detection unit is specifically a working condition sensor.
[0015] Based on the structure of the high-sensitivity fire detection system for existing building renovation projects, the detection host is set up on the 9th floor, and the first main line and the second main line are connected to the smoke detector on the 8th floor respectively.
[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:
[0017] 1. This solution adjusts the detector fan speed according to the normal air quality of the renovation site, reducing the interference of smoke in the air on the detector and causing the detector to report false alarms. It can also take into account the earlier detection of fire conditions in the early stages of fire, thereby realizing measures to optimize and improve fire protection in the renovation of existing buildings.
[0018] 2. This solution can improve the response time of fire detection: by utilizing the advantages of aspirating smoke detectors in terms of high sensitivity and fast response compared to traditional detectors, fire alarms can be detected earlier and faster in the early stages of a fire, providing more evacuation time for personnel and improving fire safety.
[0019] 3. The equipment is more adaptable and can meet the needs of more places: Since the working environment of the detector is diverse, the added environmental sensing device adjusts the alarm threshold of the fire protection system and the exhaust fan wind speed according to the air quality data of the long-term working environment, reducing the probability of high-sensitivity detectors falsely alarming due to non-fire dust, making this system suitable for most types of buildings.
[0020] 4. With a relatively small investment in equipment, this system can be used to provide an additional fire protection improvement measure for old buildings where civil engineering cannot be modified. It is more economical and effective: this system can be added when an automatic fire alarm system is installed. This system has low cost, high detection sensitivity, short response time and strong adaptability. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0022] Figure 2 This is a schematic diagram of the layout in the middle of the floor;
[0023] Description of the drawings: 1. Smoke sensing unit; 2. Auxiliary sensing unit; 3. Detection host; 4. Fire alarm system; 5. Aspirating smoke detector; 6. Wind speed detection unit; 7. Elevator shaft; 11. Smoke sampling tube; 12. Smoke sampling hole; 31. First main line; 32. Second main line; 33. Auxiliary cable; 51. Fan. DETAILED DESCRIPTION
[0024] All features disclosed in this specification, or all steps in the disclosed methods or processes, except mutually exclusive features and / or steps, can be combined in any manner.
[0025] Any feature disclosed in this specification (including any appended claims and abstract), unless otherwise stated, may be replaced by other equivalent or similar features. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.
[0026] In the description of the present invention, it should be understood that the terms "up", "down", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are 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 direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.
[0027] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be understood to indicate or imply relative importance or to implicitly indicate the quantity of the technical features being referred to. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of such features.
[0028] Example 1
[0029] like Figure 1 and Figure 2 As shown, the utility model provides a technical solution:
[0030] A high-sensitivity fire detection system for existing building renovation projects, which at least includes but is not limited to a smoke sensor 1, an auxiliary sensing unit 2, a detection host 3 and a fire alarm system 4. The detection host 3 is arranged on the middle floor of the building to be renovated, and the smoke sensor 1 and the auxiliary sensing unit 2 are respectively arranged along each floor of the building to be renovated. An aspirating smoke detector 5 is provided on the detection host 3, and a wind speed detection unit 6 is also connected to the fan 51 of the aspirating smoke detector 5. The wind speed detection unit is connected to the detection host 3; the sensing unit is connected to the aspirating smoke detector 5, and the auxiliary sensing unit 2 is connected to the detection host 3; and the fire alarm system 4 is connected to the detection host 3.
[0031] Based on the above structure, this solution makes special settings for the complex working conditions of old residential areas without making major changes to existing buildings. That is, a smoke sensor 1 and an auxiliary sensor 2 are set on each floor, which can realize accurate detection of the conditions on each floor. The data collected by the smoke sensor 1 and the auxiliary sensor 2 are summarized into the aspirating smoke detector 5 and the detection host 3. The aspirating smoke detector 5 can efficiently detect the air on each floor and can sensitively detect smoke in the air. It can detect fire alarms earlier and faster in the early stage of a fire, provide more evacuation time for personnel evacuation, and improve fire safety. The wind speed detection unit is used to detect the wind speed of the fan 51 to prepare for the detection host 3 to control the wind speed.
[0032] Example 2
[0033] Based on the above embodiment 1, in this embodiment:
[0034] The smoke sensor 1 may be a smoke sampling tube 11 and a smoke sampling hole 12. The smoke sampling tube 11 is arranged along the rooms and passages of the current floor. The smoke sampling hole 12 is arranged along the rooms of the current floor and is arranged in plurality at the passages of the current floor.
[0035] The auxiliary sensing unit 2 is an environmental detector, which is located at the center of the current floor. There is only one environmental detector on the current floor.
[0036] Based on the above structure, the environmental detector detects the data of the current floor such as air temperature and humidity, wind speed and direction, and environmental dust, and transmits the data to the detection host 3. The detection host 3 adjusts the wind speed of the fan 51 of the aspirating smoke detector 5 according to the current environmental influencing factors. When the environmental data is complex, the speed of the fan 51 is increased to increase the negative pressure in the pipeline so that more air enters the pipeline. When the environmental data is single, the speed of the fan 51 is reduced to reduce the negative pressure in the pipeline so that relatively less air enters the pipeline. This solution can more effectively improve the fire safety of existing buildings.
[0037] As an example, the wind speed detection unit 6 may specifically be an operating condition sensor.
[0038] Example 3
[0039] Based on the above embodiment 2, in this embodiment:
[0040] As an example, the detection host 3 is provided with a first main line 31, a second main line 32, and an auxiliary cable 33. The first main line 31 and the second main line 32 are respectively connected to the aspirating smoke detector 5 on the detection host 3. The first main line 31 extends upward to the top floor and is respectively connected to the smoke detector 1 on each floor. The second main line 32 extends downward to the bottom floor and is respectively connected to the smoke detector 1 on each floor. The auxiliary cable 33 is connected to the detection host 3.
[0041] The first main line 31 , the second main line 32 and the auxiliary cable 33 may be disposed in the elevator shaft 7 .
[0042] Based on the above structure, the detection host 3 obtains power through the auxiliary cable 33, and can quickly collect air data on different floors through the first main line 31 and the second main line 32. The aspirating smoke detector 5 can quickly judge the air data in the first main line 31 and the second main line 32. When the specified threshold is reached, the fire alarm system 4 of the building is linked to sound an alarm.
[0043] As an example, the sum of the lengths of the first main line 31 and the second main line 32 is not greater than 200m, the length of the smoke sampling pipe 11 on each floor is not greater than 100m, the number of smoke sampling holes 12 on the smoke sampling pipe 11 is not greater than 25, and the number of smoke sampling holes 12 on all floors is not greater than 100.
[0044] Based on the above structure, for cost considerations, the power of the fan 51 of the aspirating smoke detector 5 will not be too large. Therefore, it is necessary to reasonably set the total length of the gas pipeline and the number of smoke sampling holes 12 so that the smoke sampling tubes 11 on each floor can have a preset negative pressure for air intake to ensure the sensitivity of detection.
[0045] As an example, the protection area of the smoke sampling hole 12 is the same as the protection area of the traditional point-type smoke detector. In this way, no excessive changes will be made to the existing building, reducing the difficulty of later renovation.
[0046] This solution sets the detection host 3 on the middle floor, which can make the path lengths of the first main line 31 and the second main line 32 equivalent, so that the upper and lower air extractions are balanced, the air extraction efficiency is improved, and the difficulty of subsequent maintenance and inspection is reduced.
[0047] The present invention utilizes the characteristics of high sensitivity and wide coverage of the aspirating smoke detector 5 compared with the traditional point-type smoke detector. It can detect fire earlier and more timely in the early stage of fire, buying more time for personnel evacuation. The addition of an environmental sensor device can be adjusted according to the working environment, allowing the highly sensitive smoke detector to adapt to more places.
[0048] (1) In the renovation of old buildings, when an automatic fire alarm is designed, an aspirating smoke detector 5 is added. It identifies fires by detecting smoke particles in the air. The aspirating smoke detector package introduces the surrounding air into the detector through the air inlet. Inside the detector is a photosensitive element (photodiode) and a light source (light-emitting diode). When there is smoke in the air, the smoke particles will scatter light, allowing the light to be received by the photosensitive element. After receiving the scattered light, the photosensitive element will generate an electrical signal. After amplification and processing, this electrical signal can be recognized and analyzed by the detector's circuit system. According to the preset smoke concentration threshold, when the smoke concentration detected by the detector exceeds the set value, the detector will issue an alarm signal.
[0049] (2) The aspirating smoke detector 5 is applied to residential projects (renovation of old buildings). Since people often come and go in corridors and public areas, kitchen fumes or smoking fumes in the residence will cause the system to falsely alarm when encountering this detector. Therefore, a working condition sensor and an environmental sensor are connected in parallel at the fan 51 motor. The environmental sensor is mainly used to sense information about the surrounding environment, including air temperature and humidity, wind speed and direction, and environmental dust. The sensor collects accurate environmental information. The working condition sensor is used to monitor the parameters of the sensor fan 51, such as the wind speed of the fan 51. Finally, the wind speed information of the fan 51 and the air quality information measured by the working condition sensor and the environmental sensor are summarized to the detection host 3. The detection host 3 comprehensively judges the environmental dust situation based on the environmental information over a period of time to adjust the wind speed of the detector fan 51, so that the exhaust wind speed of the fan 51 is maintained at a speed that can quickly detect smoke and does not cause false alarms due to surrounding non-fire dust, so that the aspirating smoke detector 5 can better work to protect building fire protection according to different service scenarios.
[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A high-sensitivity fire detection system for existing building renovation projects, characterized in that: It at least includes a smoke sensing unit, an auxiliary sensing unit, a detection host and a fire alarm system. The detection host is arranged on the middle floor of the building to be renovated, and the smoke sensing unit and the auxiliary sensing unit are respectively arranged along each floor of the building to be renovated. The detection host is provided with an aspirating smoke detector, and the fan of the aspirating smoke detector is also connected to a wind speed detection unit, and the wind speed detection unit is connected to the detection host; the sensing unit is connected to the aspirating smoke detector, and the auxiliary sensing unit is connected to the detection host; the fire alarm system is connected to the detection host.
2. The high-sensitivity fire detection system for existing building renovation projects according to claim 1, characterized in that: The smoke sensing part is a smoke sampling tube and a smoke sampling hole. The smoke sampling tube is arranged along the rooms and passages of the current floor. The smoke sampling holes are arranged along the rooms of the current floor and are arranged in multiple numbers at the passages of the current floor.
3. The high-sensitivity fire detection system for existing building renovation projects according to claim 2, characterized in that: The auxiliary sensing part is an environmental detector, which is arranged at the center of the current floor. There is only one environmental detector on the current floor.
4. The high-sensitivity fire detection system for existing building renovation projects according to claim 3, characterized in that: The detection host is provided with a first main line, a second main line and an auxiliary cable. The first main line and the second main line are respectively connected to the aspirating smoke detector on the detection host. The first main line extends upward to the top floor, and the first main line is respectively connected to the smoke sensing part of each floor. The second main line extends downward to the bottom floor, and the second main line is respectively connected to the smoke sensing part of each floor. The auxiliary cable is connected to the detection host.
5. The high-sensitivity fire detection system for existing building renovation projects according to claim 4, characterized in that: The first main line, the second main line and the auxiliary cables are arranged in the elevator shaft.
6. The high-sensitivity fire detection system for existing building renovation projects according to claim 5, characterized in that: The sum of the lengths of the first main line and the second main line is no more than 200m, and the length of the smoke sampling pipe on each floor is no more than 100m.
7. The high-sensitivity fire detection system for existing building renovation projects according to claim 6, characterized in that: The number of smoke sampling holes on the smoke sampling tube shall not exceed 25, and the number of smoke sampling holes on all floors shall not exceed 100.
8. The high-sensitivity fire detection system for existing building renovation projects according to claim 7, characterized in that: The protection area of the smoke sampling hole is the same as the protection area of a traditional point-type smoke fire detector.
9. The high-sensitivity fire detection system for existing building renovation projects according to claim 8, characterized in that: The wind speed detection unit is specifically a working condition sensor.
10. The high-sensitivity fire detection system for existing building renovation projects according to claim 1, characterized in that: The detection host is set up on the 9th floor, and the first main line and the second main line are connected to the smoke detection unit on the 8th floor respectively.