Automatic foam liquid spraying system for tunnel fire-fighting water layer film

Abstract

The utility model discloses a tunnel fire-fighting water layer film foam liquid automatic spraying system which comprises a foam box, a controller, a peristaltic pump, a water flow detector and a foam liquid flow detector, water layer film foam liquid is arranged in the foam box, and the foam box is connected to a fire-fighting pipe through a foam liquid pipe. A peristaltic pump is arranged on the foam liquid pipe to suck water layer film foam liquid, the foam liquid flow detector is arranged on the foam pipe, the water flow detector is arranged on the fire fighting pipe, and the peristaltic pump, the water flow detector and the foam liquid flow detector are electrically connected with the controller. According to the utility model, the water flow detector is arranged on the fire-fighting pipe and can detect the water flow in the fire-fighting pipe, so that a control signal is output to control the operation of the peristaltic pump so as to suck water layer membrane foam liquid, and the water layer membrane foam liquid is introduced into the fire-fighting pipe to be mixed with water, thereby realizing automatic foam discharge control of the fire-fighting water layer membrane foam liquid.

Description

TECHNICAL FIELD

[0001] The utility model relates to fire fighting equipment technical field, especially a tunnel fire water layer membrane foam liquid automatic spraying system. BACKGROUND

[0002] The stable operation of the fire fighting system in the highway tunnel is very important, however, the fire water layer membrane foam liquid often does not foam or cannot foam in time due to the inconsistent control of the fire water layer membrane foam liquid and the fire pipe water flow switch and other problems when the highway tunnel fire box is used, which affects the efficiency of fire rescue, therefore, it is imperative to develop a set of fire water layer membrane foam liquid automatic spraying system. CONTENT OF THE UTILITY MODEL

[0003] The utility model discloses a tunnel fire water layer membrane foam liquid automatic spraying system can realize the automatic control of the foam of the fire water layer membrane foam liquid.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] The tunnel fire water layer membrane foam liquid automatic spraying system comprises a foam box, a controller, a peristaltic pump, a water flow detector and a foam liquid flow detector, the water layer membrane foam liquid is arranged in the foam box, the foam box is connected to the fire pipe through a foam liquid pipe, the peristaltic pump is arranged on the foam liquid pipe to suck the water layer membrane foam liquid, the foam liquid flow detector is arranged on the foam pipe, the water flow detector is arranged on the fire pipe, and the peristaltic pump, the water flow detector and the foam liquid flow detector are electrically connected to the controller.

[0006] The positive pole of the direct current power supply is connected to the power supply positive pole input end of the current voltage amplifier, the positive pole of the controller, the positive pole of the water flow detector and the positive pole of the foam liquid flow detector respectively, the negative pole of the direct current power supply is connected to the power supply negative pole input end of the current voltage amplifier, the negative pole of the controller and the com pin of the controller respectively, the negative pole of the water flow detector and the negative pole of the foam liquid flow detector are connected to two X pins of the controller respectively, the power supply positive pole output end and the power supply negative pole output end of the current voltage amplifier are connected to the positive pole and the negative pole of the peristaltic pump respectively, the signal positive pole input end and the signal negative pole input end of the current voltage amplifier are connected to the signal positive pole output pin and the signal negative pole output pin of the controller respectively, the controller is PLC, the direct current power supply is 24V direct current power supply, the peristaltic pump is an adjustable speed direct current motor peristaltic pump, and the water flow detector is arranged at the upstream position of the connection point of the fire pipe and the foam liquid pipe.

[0007] As described above, the water flow detector arranged on the fire pipe can detect the water flow in the fire pipe, and a control signal is output according to the water flow to control the operation of the peristaltic pump, so that the water layer membrane foam liquid is pumped and introduced into the fire pipe to mix with water, and the automatic control of the foam of the fire water layer membrane foam liquid is realized; and the foam liquid flow detector arranged on the foam pipe can detect the liquid flow in the foam pipe, and the speed of the peristaltic pump is adjusted according to the water flow and the water flow output control signal, so that the mixing ratio of water and water layer membrane foam liquid is adjusted.

[0008] Based on the foregoing scheme, in an improved scheme, in order to solve the problem of water flowing back from the fire pipe to the foam pipe, a one-way valve is arranged on the foam liquid pipe, the one-way valve is arranged between the peristaltic pump and the fire pipe, and the flow direction of the one-way valve is from the peristaltic pump to the fire pipe, so that the one-way valve can prevent water from flowing back to the foam pipe.

[0009] Based on the foregoing scheme, in an improved scheme, in order to solve the problem of uneven mixing of water and water layer membrane foam liquid in the fire pipe, a mixer is arranged on the fire pipe, the mixer is arranged at the connection point of the foam liquid pipe and the fire pipe, so that the water and the water layer membrane foam liquid are mixed uniformly through the static mixer.

[0010] Due to the adoption of the above technical scheme, the tunnel fire water layer membrane foam liquid automatic spraying system has the following beneficial effects:

[0011] The tunnel fire water layer membrane foam liquid automatic spraying system of the utility model arranges water flow detectors on fire pipes, arranges foam liquid flow detectors on foam pipes, can detect and monitor the water flow in the fire pipe and the flow of the water layer membrane foam liquid pipe, controls the speed of the peristaltic pump according to the water flow and the water layer membrane foam liquid flow, sprays the mixed water layer membrane foam liquid and fire water in a proper ratio, and can realize 100% foam rate of the fire water layer membrane foam liquid. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is the system principle diagram of the utility model.

[0013] Figure 2 It is the circuit diagram of the utility model.

[0014] Figure 3 It is the connection structure diagram of the fire pipe and the foam pipe of the utility model.

[0015] In the drawings, 10 is a fire pipe, 11 is a mixer, 20 is a foam pipe, and 21 is a one-way valve. DETAILED DESCRIPTION

[0016] Example 1

[0017] Referring to Figures 1-3The tunnel fire-fighting water layer film foam liquid automatic spraying system of this embodiment 1 includes a foam box, a controller, a peristaltic pump, a water flow detector and a foam liquid flow detector. The foam box is configured with water layer film foam liquid, and the foam box is connected to the fire pipe through a foam liquid pipe. The foam liquid pipe is provided with a peristaltic pump to suck the water layer film foam liquid. The foam liquid flow detector is arranged on the foam pipe, and the water flow detector is arranged on the fire pipe. The peristaltic pump, the water flow detector and the foam liquid flow detector are electrically connected to the controller respectively.

[0018] The water flow detector is arranged upstream of the connection point between the fire hose and the foam liquid pipe. It can be set close to the connection point. At this time, it takes a certain amount of time for the water flow detector to detect the water flow and foaming, so the foam liquid will foam after a certain period of water flow. It can also be set further upstream, such as 5m upstream, so that the water flow can be detected earlier, thereby reducing the delay time of foaming. This application improves the automatic control connection of the original fire protection system on the basis of the existing fire protection system, and adds a detector and peristaltic pump monitoring structure. The controller, peristaltic pump, flow detector and other components and their connection control are all existing technologies. This application is to adapt them to the fire protection equipment and make adaptive improvements.

[0019] like Figure 2 As shown, the positive electrode of the DC power supply is respectively connected to the positive power input terminal of the current and voltage amplifier, the positive electrode of the controller, the positive electrode of the water flow detector and the positive electrode of the foam liquid flow detector; the negative electrode of the DC power supply is respectively connected to the negative power input terminal of the current and voltage amplifier, the negative electrode of the controller and the COM pin of the controller; the negative electrode of the water flow detector and the negative electrode of the foam liquid flow detector are respectively connected to the two X pins of the controller; the positive power output terminal and the negative power output terminal of the current and voltage amplifier are respectively connected to the positive and negative electrodes of the peristaltic pump; the positive signal input terminal and the negative signal input terminal of the current and voltage amplifier are respectively connected to the positive signal output pin and the negative signal output pin of the controller.

[0020] In a specific example of this system, the water flow in the fire hydrant pipe is monitored using a flow meter. A Tengfei Automation Instrument DN25 pulse threaded type outputs 4-20mA current to a PLC controller, with a flow monitoring range of 0-10 cubic meters per hour. The water film foam flow rate is monitored using a Tengfei Automation Instrument DN25 pulse threaded type output, which outputs 4-20mA current to a PLC controller, with a flow monitoring range of 0.04-0.25 cubic meters per hour. The PLC is a Mitsubishi FX3U programmable controller. The peristaltic pump is a Lifu 303ADB adjustable-speed DC motor (adjustable-speed DC motor peristaltic pump), with a supply voltage of 0-12V, a power of 12W, and a flow rate of 40ml-900ml / min. A current amplifier amplifies the 0-10V signal output by the PLC into a 0-12V voltage and 1A current supply.

[0021] As described above, the water flow detector arranged on the fire pipe can detect the water flow in the fire pipe, and output a control signal to control the operation of the peristaltic pump to suck the water layer membrane foam liquid and introduce it into the fire pipe to mix with water, thereby achieving automatic control of the foam rate of the fire water layer membrane foam liquid; and the foam liquid flow detector arranged on the foam pipe can detect the liquid flow in the foam pipe, and output a control signal to adjust the speed of the peristaltic pump according to the water flow, thereby achieving adjustment of the mixing ratio of water and water layer membrane foam liquid.

[0022] The system comprises a PLC controller, a current amplifier, a direct current adjustable speed peristaltic pump, a flow detector and the like. The flow detector monitors the water flow and water layer membrane foam liquid flow in the fire box pipe (including the fire pipe 10 and the foam pipe 20), and outputs 4-20 mA current to two analog input channels of the PLC controller. The PLC controller calculates and outputs 0-10 V voltage according to the ratio of water flow and water layer membrane foam liquid 100:3.5. The signal output by the PLC drives the direct current adjustable speed peristaltic pump after being amplified. The peristaltic pump directly introduces the water layer membrane foam liquid from the foam box into the fire pipe to mix with water for spraying, thereby achieving 100% foam rate of the fire water layer membrane foam liquid, and providing protection for tunnel fire fighting.

[0023] Embodiment 2

[0024] On the basis of embodiment 1, embodiment 2 has a backflow prevention structure, which is as follows:

[0025] Referring to Figure 3 , embodiment 2 is to solve the problem of backflow of water in the fire pipe into the foam pipe. A one-way valve 21 is arranged on the foam liquid pipe 20. The one-way valve is arranged at a position between the peristaltic pump and the fire pipe, and the flow direction of the one-way valve is from the peristaltic pump to the fire pipe. In this way, the one-way valve can prevent water from flowing back to the foam pipe.

[0026] Embodiment 3

[0027] On the basis of embodiment 1 or embodiment 2, embodiment 3 has a mixing structure, which is as follows:

[0028] Referring to Figure 3 , embodiment 3 is to solve the problem of uneven mixing of water and water layer membrane foam liquid in the fire pipe. A mixer 11 is arranged on the fire pipe 10. The mixer is arranged at a position of the connection point of the foam liquid pipe and the fire pipe. In this way, the static mixer mixes the water and the water layer membrane foam liquid evenly, thereby improving the stable mixing output of the water foam in a certain ratio.

[0029] It should be noted that the above embodiments can be combined with one or more than two according to actual needs, and a plurality of examples adopt a set of combined technical features of the drawings, which will not be described one by one here.

[0030] It should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation.

[0031] The above description is a detailed description and example of the preferred and feasible embodiments of the present application, but these descriptions are not intended to limit the scope of the present application, and any equivalent changes or modifications made under the technical teaching of the present application should be within the scope of the patent protection of the present application.

Claims

1. An automatic spraying system for tunnel fire-fighting water layer film foam liquid, characterized by: It includes a foam box, a controller, a peristaltic pump, a water flow detector and a foam liquid flow detector. The foam box is provided with water layer film foam liquid. The foam box is connected to the fire pipe through a foam liquid pipe. The foam liquid pipe is provided with a peristaltic pump to suck the water layer film foam liquid. The foam liquid flow detector is arranged on the foam pipe. The water flow detector is arranged on the fire pipe. The peristaltic pump, water flow detector and foam liquid flow detector are electrically connected to the controller respectively.

2. The automatic spraying system for tunnel fire-fighting water layer membrane foam liquid according to claim 1 is characterized in that: It also includes a current and voltage amplifier and a DC power supply. The positive pole of the DC power supply is respectively connected to the positive power input terminal of the current and voltage amplifier, the positive pole of the controller, the positive pole of the water flow detector and the positive pole of the foam liquid flow detector. The negative pole of the DC power supply is respectively connected to the negative power input terminal of the current and voltage amplifier, the negative pole of the controller and the com pin of the controller. The negative pole of the water flow detector and the negative pole of the foam liquid flow detector are respectively connected to the two X pins of the controller. The positive power output terminal and the negative power output terminal of the current and voltage amplifier are respectively connected to the positive pole and negative pole of the peristaltic pump. The positive signal input terminal and the negative signal input terminal of the current and voltage amplifier are respectively connected to the positive signal output pin and the negative signal output pin of the controller.

3. The automatic spraying system for tunnel fire-fighting water layer membrane foam liquid according to claim 2 is characterized in that: The controller is a PLC.

4. The automatic spraying system for tunnel fire-fighting water layer membrane foam liquid according to claim 2 is characterized in that: The DC power supply is a 24V DC power supply.

5. The automatic spraying system for tunnel fire-fighting water layer membrane foam liquid according to claim 2 is characterized in that: The peristaltic pump is a speed-adjustable DC motor peristaltic pump.

6. The automatic spraying system for tunnel fire-fighting water layer membrane foam liquid according to claim 1 is characterized by: The water flow detector is arranged at an upstream position of a connection point between the fire fighting pipe and the foam liquid pipe.

7. The automatic spraying system for tunnel fire-fighting water layer membrane foam liquid according to claim 1 is characterized by: The foam liquid pipe is provided with a one-way valve, which is arranged between the peristaltic pump and the fire-fighting pipe, and the flow direction of the one-way valve is from the peristaltic pump to the fire-fighting pipe.

8. The automatic spraying system for tunnel fire-fighting water layer membrane foam liquid according to claim 1 is characterized by: The fire-fighting pipe is provided with a mixer, which is arranged at the connection point between the foam liquid pipe and the fire-fighting pipe.

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