Civil air defense project poison filtering and ventilating system

Abstract

The utility model discloses a civil air defense project poison filtering and ventilating system which comprises an air inlet, a dust remover, a main poison filter, an air outlet, a civil air defense basement and an air outlet which are connected in series on a main ventilating pipeline, and a detection device is arranged on the main ventilating pipeline between the dust remover and the main poison filter. A first ventilation branch, a second ventilation branch and an exhaust branch are connected to the main ventilation pipeline on the rear side of the detection device in parallel, the tail end of the first ventilation branch and the tail end of the second ventilation branch are connected to the main ventilation pipeline on the front side of the air outlet, and a standby poison filter is arranged on the first ventilation branch. A series pipeline is arranged between the rear side of the main poison filter and the front side of the standby poison filter, the tail end of the exhaust branch is connected to the exhaust outlet, and control valves are arranged on the main ventilation pipeline, the first ventilation branch, the second ventilation branch, the exhaust branch and the series pipeline. According to the poison filtering and ventilating system for the civil air defense engineering, the upper limit of system treatment can be effectively improved, the pause phenomenon of the system is avoided, and life safety of personnel in an underground civil air defense room is guaranteed to the maximum extent.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of civil air defense engineering, especially to a civil air defense engineering filter ventilation system. BACKGROUND

[0002] Civil air defense engineering is a public safety building constructed for coping with special environment such as wartime and disaster time, which has complex system and rigorous structure, and needs to fully consider the special environment of wartime and disaster time in design and construction, and requires a special ventilation system. In the prior art, the ventilation system of civil air defense engineering generally needs to be provided with a filter device to filter out toxic substances in the air flow sucked from the outside to ensure the ventilation safety in the civil air defense basement.

[0003] Patent CN108031232A discloses a civil air defense engineering ventilation system, which has the following shortcomings: (1) the upper limit of the filter system is low, and once the concentration of toxic substances in the air exceeds the filter load, the ventilation will fail; (2) when the filter system needs to be cleaned or the filter element needs to be replaced after running for a period of time, the system must be stopped, resulting in no ventilation; (3) the outside air directly enters the filter, which affects the filtering effect in the case of high dust content in the air, and seriously causes the filter element to be worn out, further causing the filter element to be replaced frequently and the ventilation to be frequently stopped. The above shortcomings seriously endanger the safety of the personnel in the underground civil air defense room. UTILITY MODEL CONTENT

[0004] The utility model aims to provide a civil air defense engineering filter ventilation system to solve the problems in the prior art.

[0005] The utility model is implemented in the following way: a civil air defense engineering filter ventilation system, which comprises an air inlet, a dust remover, a main filter, an air outlet, a civil air defense basement and an air outlet, which are connected in series on a main ventilation pipeline, a detection device is arranged on the main ventilation pipeline between the dust remover and the main filter, a first ventilation branch, a second ventilation branch and an exhaust branch are connected in parallel on the main ventilation pipeline at the rear side of the detection device, the first ventilation branch and the second ventilation branch are connected to the main ventilation pipeline at the front side of the air outlet, a standby filter is arranged on the first ventilation branch, a series pipeline is arranged between the rear side of the main filter and the front side of the standby filter, the exhaust branch is connected to the air outlet, and control valves are arranged on the main ventilation pipeline, the first ventilation branch, the second ventilation branch, the exhaust branch and the series pipeline.

[0006] The civil air defense engineering filter ventilation system of the utility model, first dust removal and then filter poison, effectively improve the filter life of filter, reduce the filter replacement maintenance frequency, and the standby filter is arranged, so that the ventilation system can normally operate when the main filter is maintained, and when the concentration of toxic substances in the air is large, the control valve can be operated to make the main filter and the standby filter form a series relationship, improve the system processing upper limit, and maximize the safety of underground civil air defense personnel.

[0007] As a further improvement of the utility model, the detection device and the control valve are connected with the control system. The control system controls each control valve on the pipeline according to the concentration of toxic substances in the airflow fed back by the detection device. When the concentration of toxic substances is lower than the preset value A, no filter is needed, and the second ventilation branch is connected. When the concentration of toxic substances is greater than or equal to the preset value A and less than the preset value B, the main ventilation branch or the first ventilation branch of the filter section is connected (when the main filter is maintained, the first ventilation branch is opened), and the main filter or the standby filter enters the working state. When the concentration of toxic substances is greater than or equal to the preset value B and less than the preset value C, the main filter and the standby filter form a series relationship and both enter the working state. When the concentration of toxic substances is greater than or equal to the preset value C, the exhaust branch is opened, and the gas is directly discharged from the exhaust port without entering the underground civil air defense room.

[0008] As a further improvement of the utility model, the main filter and the standby filter each include a series connection of a first filter and a second filter, and the series connection pipeline includes a first filter series connection pipeline and a second filter series connection pipeline, so that the toxic gas passes through the two first filters in turn and then passes through the two second filters in turn, thereby realizing effective adsorption and filtration of the toxic substances.

[0009] As a further improvement of the utility model, the dust remover includes two groups in parallel, and each group of dust removers is provided with a control valve on the front side, thereby facilitating replacement, cleaning and maintenance of the dust removers.

[0010] As a further improvement of the utility model, each group of dust removers includes a series connection of a first dust remover, a second dust remover and a third dust remover, which sequentially filter large-particle impurities, small-particle impurities and fine impurities, thereby improving the filter effect of the subsequent filters.

[0011] As a further improvement of the utility model, a standby air inlet is further included, the standby air inlet is connected to the main ventilation pipeline on the front side of the dust remover through a standby air inlet pipeline, and a control valve is arranged on the standby air inlet pipeline. When the detection device detects that the concentration of toxic substances in the air entering the air inlet exceeds the system processing capacity, the standby air inlet can be enabled to ensure the safety of underground civil air defense personnel. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1The utility model discloses a civil air defense engineering filter ventilation system's schematic diagram. DETAILED DESCRIPTION

[0013] As Figure 1 The civil air defense engineering filter ventilation system shown in the figure, including the air inlet 1, dust remover 2, main filter, air outlet 5, civil air defense basement 6 and exhaust port 7 that are connected in series in main ventilation pipeline.The main ventilation pipeline between dust remover and main filter is equipped with detection device 8, and the main ventilation pipeline on the rear side of detection device 8 is connected with first ventilation branch, second ventilation branch and exhaust branch in parallel, and the first ventilation branch and second ventilation branch are connected to the main ventilation pipeline on the front side of air outlet 5, and a standby filter is arranged on the first ventilation branch, and a series pipeline is arranged between the rear side of main filter and the front side of standby filter, and the exhaust branch is connected to the exhaust port 7.The main ventilation pipeline, first ventilation branch, second ventilation branch, exhaust branch and series pipeline are all equipped with control valve.Detection device 8 and control valve are connected with control system 9.

[0014] In the embodiment, the main filter includes series first filter 3 and second filter 4, and the standby filter includes series first filter 3' and second filter 4'.The series pipeline includes first filter series pipeline and second filter series pipeline, so that when the control system 9 controls the series connection of main filter and standby filter, the toxic gas can pass through first filter 3, first filter 3', second filter 4 and second filter 4' in turn, improving the adsorption and filtration capacity of toxic substances.

[0015] The civil air defense engineering filter ventilation system of the embodiment is also provided with standby dust remover 2', and the standby dust remover 2' and dust remover 2 are connected in parallel, and the front side of dust remover 2 and standby dust remover 2' is equipped with control valve, facilitating the replacement, cleaning and maintenance of dust remover.Both dust remover 2 and standby dust remover 2' include series first dust remover, second dust remover and third dust remover, filtering large particle impurities, small particle impurities and fine impurities in turn, improving the filter effect of subsequent filters.In addition, the civil air defense engineering filter ventilation system of the embodiment also includes standby air inlet 1', and the standby air inlet 1' is arranged away from the air inlet 1.The standby air inlet 1' is connected to the main ventilation pipeline on the front side of dust remover 2 and standby dust remover 2' through standby air inlet pipeline, and the standby air inlet pipeline is equipped with control valve, so that when the detection device 9 detects that the toxic substance concentration in the air entering the air inlet 1 exceeds the system processing capacity, the air inlet 1 can be closed, and the standby air inlet 1' is enabled, ensuring the safety of personnel in the underground civil air defense room.

[0016] The working process of the civil air defense engineering filter ventilation system of the embodiment is as follows:

[0017] The control system 9 controls the control valve P and the control valve M to open, the detection device 8 detects the air mass flowing through and feeds back the detection result to the control system 9. The control system 9 controls the control valves on the pipeline according to the concentration of toxic substances in the airflow fed back by the detection device 8, when the concentration of toxic substances is lower than the preset value A, the control valve F is opened, the second ventilation branch is communicated, and the air directly enters the civil air defense basement from the air outlet 5; when the concentration of toxic substances is greater than or equal to the preset value A and less than the preset value B, the control valve A and the control valve B are opened, the main ventilation branch of the filter section is communicated, the air containing harmful substances is filtered through the first filter 3 and the second filter 4, and then enters the civil air defense basement through the air outlet 5 (when the main filter is maintained, the control system controls the control valve C and the control valve D to open, and the standby filter is used for filtering); when the concentration of toxic substances is greater than or equal to the preset value B and less than the preset value C, the control system 9 controls the control valve A, the control valve G, the control valve H and the control valve I to open (the control valve B, the control valve C, the control valve D and the control valve J are in the closed state), the main filter and the standby filter form a series connection relationship, and both enter the working state, the toxic gas passes through the first filter 3, the first filter 3', the second filter 4 and the second filter 4' in sequence, and effective filtering is realized; when the concentration of toxic substances is greater than or equal to the preset value C, the control valve F is opened, the exhaust branch is opened, and the gas is directly exhausted from the air outlet 7 and does not enter the civil air defense basement, at this time, the control system also controls the control valve P to close and the control valve Q to open, and the standby air inlet 1' and the standby air inlet pipeline are started.

[0018] The civil air defense engineering filter ventilation system of the embodiment can effectively improve the service life of the filter element of the filter, reduce the maintenance frequency of the filter element, and is provided with a standby filter, so that the ventilation system can normally operate when the main filter is maintained, and when the concentration of toxic substances in the air is relatively large, the control valve can be operated to make the main filter and the standby filter form a series connection relationship, improve the upper limit of the system, and maximize the safety of the personnel in the underground civil air defense room.

[0019] The utility model discloses not limited to the above -mentioned embodiment, on the basis of the technical scheme disclosed in the utility model, the technical content disclosed in the utility model is not creative labor, and some technical features can be replaced and deformed, and the replacement and deformation are all within the protection scope of the utility model.

Claims

1. A ventilation system for air-raid shelters, characterized in that: The air inlet, dust remover, main filter, air outlet, civil air defense basement and air exhaust are connected in series on the main ventilation pipeline, a detection device is arranged on the main ventilation pipeline between the dust remover and the main filter, a first ventilation branch, a second ventilation branch and an exhaust branch are connected in parallel on the main ventilation pipeline at the rear side of the detection device, the first ventilation branch and the second ventilation branch are connected to the main ventilation pipeline at the front side of the air outlet, a standby filter is arranged on the first ventilation branch, a series pipeline is arranged between the rear side of the main filter and the front side of the standby filter, the exhaust branch is connected to the air exhaust, and control valves are arranged on the main ventilation pipeline, the first ventilation branch, the second ventilation branch, the exhaust branch and the series pipeline.

2. The civil defense filter-ventilation system of claim 1, wherein: The detection device and the control valves are connected with a control system.

3. The civil defense filter-ventilation system of claim 2, wherein: The main filter and the standby filter each comprise a first filter and a second filter connected in series, and the series pipeline comprises a first filter series pipeline and a second filter series pipeline.

4. The civil defense filter-ventilation system of claim 1, wherein: The dust remover comprises two groups connected in parallel, and a control valve is arranged at the front side of each group of dust removers.

5. The civil defense filter-ventilation system of claim 1, wherein: Each group of dust removers comprises a first dust remover, a second dust remover and a third dust remover connected in series.

6. The civil defense filter-ventilation system according to any one of claims 1-5, characterized in that: A standby air inlet is further arranged, the standby air inlet is connected to the main ventilation pipeline at the front side of the dust remover through a standby air inlet pipeline, and a control valve is arranged on the standby air inlet pipeline.

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