Anti-freezing early warning and control device for subway engineering fire water supply system

Abstract

The utility model discloses an anti-freezing early warning and control device for a subway engineering fire water supply system, which relates to the technical field of subway station fire protection and comprises an alarm control host, a fire-fighting pipeline without heat preservation, a fire-fighting pipeline with anti-freezing and heat preservation functions, a temperature sensor group, an electric valve group, a flow sensor group, a communication signal cable and a control cable. According to the anti-freezing and heat-preservation firefighting pipeline, a heating cable is wound on the outer wall of the pipeline, a heat insulation material with a certain thickness is wrapped on the outer wall of the pipeline or only wrapped on the outer wall of the pipeline, the thickness of the heat insulation material is determined according to the field use environment, and a protection layer is arranged on the outer layer of the heat insulation material. The temperature sensor set, the electric valve set and the flow sensor set are all connected with the alarm control host, the temperature sensor, the flow sensor and the electric valve are arranged on the fire water supply pipeline, the water temperature is monitored in real time, the valves are controlled to be opened and closed, low-temperature water is drained, the pipeline is prevented from frost cracking, and the stability and reliability of the system are guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of fire protection technology in subway stations, and in particular to an antifreeze early warning and control device for fire water supply systems in subway engineering. Background Technology

[0002] Subway station entrances, exits, auxiliary ventilation ducts, and tunnel entrances all lead directly to the outdoors, and their temperatures are directly affected by the outdoor ambient temperature. Fire water supply pipes located in these locations are prone to freezing and cracking in low winter temperatures. To prevent pipe freezing and cracking from affecting the reliability of the fire water supply system, subway projects in northern cities typically require the installation of electric heat tracing cables, insulation material of a certain thickness, and an outer protective layer in these locations using an electric heat tracing and antifreeze insulation system. In contrast, subway projects in southern cities typically use a standard antifreeze insulation system with insulation material of a certain thickness and an outer protective layer in these locations.

[0003] In subway engineering, the electric heat tracing and antifreeze insulation systems or ordinary antifreeze insulation systems installed in the fire-fighting water supply system can meet the system insulation needs in most severe cold weather. However, when extreme low temperatures occur or are prolonged, subway station operators still lack more effective early warning measures and control methods for the fire-fighting water supply system's insulation, failing to guarantee the real-time reliability and safety of the system. When extreme winter temperatures cause fire-fighting pipes to freeze and crack, resulting in leaks, the fire-fighting function of the system will be lost. In the event of a fire, this could lead to significant loss of life and property. Therefore, this utility model provides an antifreeze early warning and control device for the fire-fighting water supply system in subway engineering. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model discloses an anti-freezing early warning and control device for a fire-fighting water supply system in a subway project. The device includes an alarm control host, uninsulated fire-fighting pipes, anti-freezing and insulated fire-fighting pipes, a temperature sensor group, an electric valve group, a flow sensor group, communication signal cables, and control cables. The uninsulated fire-fighting pipes are pipes whose outer surface is not covered with insulation material. The anti-freezing and insulated fire-fighting pipes have heating cables wrapped around their outer walls and are covered with insulation material of a certain thickness, or are only covered with insulation material of a certain thickness. The thickness of the insulation material is determined according to the on-site operating environment. A protective layer is provided on the outer layer of the insulation material. The temperature sensor group, electric valve group, and flow sensor group are all connected to the alarm control host.

[0005] Furthermore, the uninsulated fire-fighting pipeline is made of any one of hot-dip galvanized steel pipe, internally and externally plastic-coated composite pipe, or ductile iron pipe.

[0006] Furthermore, the protective layer is made of either aluminum foil or galvanized thin steel sheet.

[0007] Furthermore, the fire-fighting pipes with antifreeze and heat insulation are installed in the ventilation ducts of the station concourse, the station entrances and exits, and the tunnel entrances, while the fire-fighting pipes without heat insulation are installed in the station platform, the station concourse, the connection between the station entrances and exits and the main structure, and the tunnel entrances.

[0008] Furthermore, the communication signal cable is used for connecting the temperature sensor group, the flow sensor group and the alarm control host, and the control cable is used for connecting the electric valve group and the alarm control host.

[0009] The advantages of this utility model compared with the prior art are: (1) Temperature sensors, flow sensors and electric valves are installed on the fire water supply pipeline to monitor the water temperature in real time and control the valve opening and closing to discharge low-temperature water, prevent the pipeline from freezing and cracking, and ensure the stability and reliability of the system; (2) The sensors are connected to the alarm control host through the communication system. The host receives the data and alarms in time to remind the staff to take corresponding countermeasures; (3) This technology is widely applicable to fire water supply systems in civil, industrial buildings and urban tunnels, and the implementation method and setting range can be flexibly adjusted according to the specific situation. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0011] Figure 2 This utility model illustrates the antifreeze control principle of fire water supply pipes within the ventilation duct of the station concourse. Figure 1 .

[0012] Figure 3 This utility model illustrates the antifreeze control principle of fire water supply pipes within the ventilation duct of the station concourse. Figure 2 .

[0013] Figure 4 This utility model illustrates the antifreeze control principle of fire water supply pipelines inside station entrances and exits. Figure 1 .

[0014] Figure 5 This is a schematic diagram illustrating the antifreeze control principle of the fire-fighting water supply pipeline within the tunnel section of this utility model. Figure 2 .

[0015] Figure 6 This is a schematic diagram illustrating the antifreeze control principle of the fire water supply pipeline in the ventilation duct of the station concourse.

[0016] Reference numerals: 1-Alarm control host; 2-Uninsulated fire-fighting pipe; 3-Fire-fighting pipe with anti-freeze insulation; 4-Temperature sensor one; 5-Temperature sensor two; 6-Temperature sensor three; 7-Temperature sensor four; 8-Temperature sensor five; 9-Temperature sensor six; 10-Temperature sensor seven; 11-Temperature sensor eight; 12-Temperature sensor nine; 13-Temperature sensor ten; 14-Temperature sensor eleven; 15-Temperature sensor twelve; 16-Temperature sensor thirteen; 7-Temperature sensor XIV; 18-Electric valve I; 19-Electric valve II; 20-Electric valve III; 21-Electric valve IV; 22-Electric valve V; 23-Electric valve VI; 24-Electric valve VII; 25-Electric valve IX; 26-Electric valve X; 27-Electric valve XI; 28-Electric valve XII; 29-Electric valve XIII; 30-Flow sensor I; 31-Flow sensor II; 32-Flow sensor III; 33-Flow sensor IV; 34-Communication signal cable; 35-Control cable. Detailed Implementation

[0017] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0018] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] Example: Figure 1 As shown, a freeze protection early warning and control device for a fire-fighting water supply system in a subway project includes an alarm control host 1, an uninsulated fire-fighting pipe 2, a freeze-proof and insulated fire-fighting pipe 3, a temperature sensor group, an electric valve group, a flow sensor group, communication signal cables 34, and control cables 35. The uninsulated fire-fighting pipe 2 is a pipe without any insulation material covering its outer surface. The freeze-proof and insulated fire-fighting pipe 3 has heating cables wrapped around its outer wall and is covered with insulation material of a certain thickness, or only with insulation material of a certain thickness. The thickness of the insulation material is determined according to the on-site operating environment. A protective layer is provided on the outer layer of the insulation material, which is made of either aluminum foil or galvanized thin steel plate. The temperature sensor group, electric valve group, and... All flow sensor groups are connected to the alarm control host 1. The uninsulated fire-fighting pipeline 2 is made of any one of hot-dip galvanized steel pipe, internally and externally plastic-coated composite pipe, or ductile iron pipe. Communication signal cable 34 is used to connect the temperature sensor group, flow sensor group and alarm control host 1. Control cable 35 is used to connect the electric valve group and alarm control host 1. The temperature sensor group and flow sensor group can collect the temperature and flow data of the fire-fighting water pipe in real time and upload it to the alarm control host 1. The alarm control host 1 analyzes the data and issues a low temperature warning for the pipeline. The alarm control host 1 controls the opening and closing of the electric valve group to discharge the low temperature water in the fire-fighting pipeline, thereby achieving the purpose of pipeline insulation.

[0021] Fire-fighting pipes 3 with antifreeze and heat insulation are installed in the ventilation ducts of the station concourse, station entrances and exits and tunnel entrances, while fire-fighting pipes 2 without heat insulation are installed in the station platform, station concourse, the connection between the station entrances and exits and the main structure and tunnel entrances.

[0022] The temperature sensor group includes temperature sensors 1-4, 2-5, 3-6, 4-7, 5-8, 6-9, 7-10, 8-11, 9-12, 10-13, 11-14, 12-15, 13-16, and 14-17. Temperature sensors 1-4, 2-5, and 3-6 are installed on the anti-freeze and heat-insulated fire-fighting pipe 3 inside the ventilation duct of the station concourse level. Temperature sensors 4-7, 5-8, and 6-9 are installed on the uninsulated fire-fighting pipe 2 inside the station platform level. Temperature sensors 7-10 and 8-11 are installed on the uninsulated fire-fighting pipe 2 at the connection between the station entrance / exit and the main structure. Temperature sensors 912 and 1013 are installed on the antifreeze and heat-insulated fire-fighting pipe 3 inside the station entrance and exit. Temperature sensors 1114 and 1417 are installed on the uninsulated fire-fighting pipe 2 inside the tunnel. Temperature sensors 1215 and 1316 are installed on the antifreeze and heat-insulated fire-fighting pipe 3 inside the tunnel. Temperature sensors 14, 25, 36, 47, 58, 69, 710, 811, 912, 1013, 111, 121, 121, 151, 131, 141, 121, 151, 131, and 171 are all connected to the alarm control host 1 via communication signal cable 34.

[0023] The electric valve assembly includes electric valve 18, electric valve 29, electric valve 30, electric valve 41, electric valve 52, electric valve 63, electric valve 74, electric valve 925, electric valve 1026, electric valve 1127, electric valve 1228, and electric valve 1329. Electric valves 18 and 29 are installed on uninsulated fire-fighting pipe 2 within the station exhibition hall level. Electric valves 30 and 41 are installed on frost-resistant and insulated fire-fighting pipe 3 within the ventilation duct of the station exhibition hall level. Electric valves 52 and 623 are installed on uninsulated fire-fighting pipe 2 within the station platform level. Electric valves 724 and 929... 5 is installed on the uninsulated fire-fighting pipe 2 at the junction of the station entrance and the main structure and located in the station hall. Electric valve 10 26 is installed on the antifreeze and heat-insulated fire-fighting pipe 3 in the station entrance. Electric valve 11 27, electric valve 12 28 and electric valve 13 29 are installed on the uninsulated fire-fighting pipe 2 in the tunnel. Electric valve 1 18, electric valve 2 19, electric valve 3 20, electric valve 4 21, electric valve 5 22, electric valve 6 23, electric valve 7 24, electric valve 9 25, electric valve 10 26, electric valve 11 27, electric valve 12 28 and electric valve 13 29 are all connected to the alarm control host 1 through control cable 35.

[0024] The flow sensor group includes flow sensor 1 30, flow sensor 2 31, flow sensor 3 32 and flow sensor 4 33. Flow sensor 1 30 and flow sensor 2 31 are installed on the uninsulated fire-fighting pipe 2 inside the station platform level. Flow sensor 3 32 is installed on the antifreeze and heat-insulated fire-fighting pipe 3 inside the station entrance. Flow sensor 4 33 is installed on the uninsulated fire-fighting pipe 2 inside the tunnel. Flow sensor 1 30, flow sensor 2 31, flow sensor 3 32 and flow sensor 4 33 are all connected to the alarm control host 1 through communication signal cable 34.

[0025] like Figure 2 , Figure 3 As shown, the antifreeze control principle of fire water supply pipes in the ventilation duct of the station concourse is as follows:

[0026] When temperature sensors 2 (5) and 3 (6) detect that the temperature inside the antifreeze and heat-insulated fire pipeline 3 is lower than the set value, the alarm control host 1 issues a low-temperature warning. Then, after manually judging the low temperature of the pipeline, electric valves 1 (18), 2 (19), and 3 (20) are closed, and electric valve 6 (23) is opened. Flow sensor 1 (30) sends a feedback action signal. When the temperature difference between temperature sensors 4 (7) and 6 (9), the temperature difference between temperature sensors 4 (7) and 2 (5), and the temperature difference between temperature sensors 4 (7) and 3 (6) are all lower than the set value, electric valve 6 (23) is closed, and electric valves 1 (18), 2 (19), and 3 (20) are opened.

[0027] When temperature sensor 4 detects that the temperature inside the antifreeze and heat-insulated fire pipeline 3 is lower than the set value, the alarm control host 1 issues a low temperature warning. Then, after manually judging the low temperature of the pipeline, electric valves 1-18, 19-1, and 21-2 are closed, and electric valve 7-24 is opened. Electric valve 13-29 sends a feedback action signal. When the temperature difference between temperature sensor 4-7 and temperature sensor 5-8 is lower than the set value, the temperature difference between temperature sensor 4-7 and temperature sensor 2-5 is lower than the set value, and the temperature difference between temperature sensor 4-7 and temperature sensor 1-4 is lower than the set value, and all three temperature differences are lower than the set value, electric valve 6-23 is closed, and electric valves 1-18, 19-1, and 21-2 are opened.

[0028] like Figure 4 , Figure 5 As shown, the antifreeze control principle of fire water supply pipelines inside the station entrances and exits is as follows:

[0029] When temperature sensor 912 detects that the temperature of the fire-fighting pipeline 3 with antifreeze insulation inside the station entrance is lower than the set value, the alarm control host 1 issues a low temperature warning. Then, after manually judging the low temperature of the pipeline, electric valve 925 and electric valve 219 are closed, and electric valve 1026 is opened. Flow sensor 231 sends a feedback action signal. When the temperature difference between electric valve 724 and the data monitored by temperature sensor 912 is less than the set value, electric valve 1026 is closed, and electric valve 925 and electric valve 219 are opened.

[0030] When temperature sensor 1013 detects that the temperature of the fire-fighting pipeline 3 with antifreeze insulation inside the station entrance is lower than the set value, the alarm control host 1 issues a low temperature warning. Then, after manually judging the low temperature of the pipeline, electric valve 925 and electric valve 724 are closed, and electric valve 1026 is opened. Flow sensor 231 sends a feedback action signal. When the temperature difference between the data monitored by temperature sensor 811 and temperature sensor 1013 is less than the set value, electric valve 1026 is closed, and electric valve 925 and electric valve 724 are opened.

[0031] like Figure 6 As shown, the antifreeze control principle of the fire water supply pipeline within the tunnel section is as follows:

[0032] When temperature sensor 12 15 or temperature sensor 13 16 detects that the temperature of the fire-fighting pipeline 3 with antifreeze insulation in the tunnel is lower than the set value, the alarm control host 1 issues a low temperature warning. Then, after the pipeline is judged to be low in temperature, electric valve 11 27 is closed and electric valve 12 28 is opened. Flow sensor 3 32 sends a feedback action signal. When the temperature difference between the data monitored by temperature sensor 14 17 and temperature sensor 11 14 is less than the set value, electric valve 12 28 is closed and electric valve 11 27 is opened.

[0033] Furthermore, it should be noted that the shapes and names of the parts and components described in the specific embodiments described in this specification may differ. All equivalent or simple variations made based on the concept, structure, features, and principles of this utility model patent are included within the protection scope of this utility model patent. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, as long as they do not deviate from the structure of this utility model or exceed the scope defined in these claims, all of which should fall within the protection scope of this utility model.

Claims

1. A freeze protection early warning and control device for a fire-fighting water supply system in a subway project, characterized in that: The alarm control host (1), the non-heat preservation fire-fighting pipeline (2), the anti-freezing heat preservation fire-fighting pipeline (3), the temperature sensor group, the electric valve group, the flow sensor group, the communication signal cable (34) and the control cable (35), the non-heat preservation fire-fighting pipeline (2) is the pipeline without the outer surface of the heat insulation material wrapping; the anti-freezing heat preservation fire-fighting pipeline (3) is the pipeline outer wall winding heating cable and wrapping a certain thickness of heat insulation material or only wrapping a certain thickness of heat insulation material, the heat insulation material thickness is determined according to the on-site use environment, the outer layer of the heat insulation material is provided with a protective layer, the temperature sensor group, the electric valve group and the flow sensor group are connected with the alarm control host (1).

2. The early warning and control device for preventing freezing of a subway engineering fire water supply system according to claim 1, characterized in that: The non-heat preservation fire-fighting pipeline (2) adopts any one of hot-dip galvanized steel pipe, inner and outer plastic composite pipe or ductile cast iron pipe.

3. The early warning and control device for preventing freezing of a subway engineering fire water supply system according to claim 1, characterized in that: The protective layer adopts one of aluminum foil or galvanized steel sheet.

4. The early warning and control device for preventing freezing of a subway engineering fire water supply system according to claim 1, characterized in that: The anti-freezing heat preservation fire-fighting pipeline (3) is arranged in the station hall layer air duct, the station entrance and the interval gap, the non-heat preservation fire-fighting pipeline (2) is arranged in the station platform layer, the station hall layer, the station entrance and the main body junction and the interval gap.

5. The early warning and control device for preventing freezing of a subway engineering fire water supply system according to claim 1, characterized in that: The communication signal cable (34) is used for the connection between the temperature sensor group, the flow sensor group and the alarm control host (1), and the control cable (35) is used for the connection between the electric valve group and the alarm control host (1).

Images