CN215351678U - Numerical control metering type foam proportion mixing device - Google Patents

Abstract

A numerical control metering type foam proportion mixing device comprises an upper computer, a lower computer, a proportion mixer, a foam stock solution pipeline, a water pipeline, a foam solution backflow pipeline, a foam solution pump and a foam solution tank; the water conveying pipeline is connected with the proportioner and is provided with a first pressure transmitter and a first electromagnetic flowmeter; the input end of the foam liquid pump is connected with the output port of the foam liquid tank, the output end of the foam liquid pump is connected to the second input end of the proportioning mixer through a foam stock solution pipeline, and a second pressure transmitter, a second electromagnetic flowmeter and a flow regulating valve are arranged in the foam stock solution pipeline; the foam liquid return pipeline is respectively connected with the output end of the foam liquid pump and the return port of the foam liquid tank, and a third pressure transmitter and a pressure regulating valve are arranged in the foam liquid return pipeline; this numerical control metering type foam proportion mixing arrangement realizes the accurate ratio of foam stoste and water through adjusting flow control valve and pressure regulating valve, through host computer and next computer communication, realizes real-time supervision and remote monitoring.

Description

Numerical control metering type foam proportion mixing device

Technical Field

The utility model relates to the technical field of fire fighting, in particular to a numerical control metering type foam proportion mixing device.

Background

Common foam mixing systems for fire trucks all require water to be mixed with foam in a certain proportion to achieve the best fire fighting effect. The negative pressure type foam mixing system is a ring pump type system, has a simpler structure, and has high requirements on the pressure of a water inlet of a water pump and the pressure difference of a water inlet and a water outlet of the water pump;

at present, the positive pressure foam proportion mixing device in China mostly utilizes a mechanical balance valve to adjust the supply quantity of foam stock solution according to the pressure of incoming water so as to realize the proportion of the foam stock solution and clean water, the mixing proportion of the positive pressure foam mixing device is usually fixed, the mixing proportion is difficult to change after delivery, the positive pressure foam mixing device cannot be flexibly arranged, and a water head is in front, so that sudden dangerous situations such as deflagration, boil-over and the like can occur if a high-temperature special fire scene occurs.

Disclosure of Invention

The utility model provides a numerical control metering type foam proportion mixing device which is simple in structure, realizes accurate proportioning of foam stock solution and water by adjusting a flow regulating valve and a pressure regulating valve, and realizes real-time monitoring and remote monitoring of foam mixing proportion by communicating an upper computer and a lower computer.

In order to achieve the purpose, the numerical control metering type foam proportion mixing device comprises an upper computer, a lower computer, a proportion mixer, a foam stock solution pipeline, a water delivery pipeline, a foam solution backflow pipeline, a foam solution pump and a foam solution tank;

the output end of the water pipeline is connected with the first input end of the proportioner, and a first pressure transmitter and a first electromagnetic flowmeter are arranged in the water pipeline;

the input end of the foam liquid pump is connected to the output end of the foam liquid tank, the output end of the foam liquid pump is connected to the second input end of the proportioning mixer through a foam stock solution pipeline, and a second pressure transmitter, a second electromagnetic flowmeter and a flow regulating valve are arranged in the foam stock solution pipeline;

one end of the foam liquid return pipeline is connected to the output end of the foam liquid pump, the other end of the foam liquid return pipeline is connected to a return port of the foam liquid tank, and a third pressure transmitter and a pressure regulating valve are arranged in the foam liquid return pipeline;

the first pressure transmitter, the first electromagnetic flowmeter, the second pressure transmitter, the flow regulating valve, the second electromagnetic flowmeter, the third pressure transmitter and the pressure regulating valve are respectively connected with the lower computer;

the upper computer is connected with the lower computer.

Further, the foam pump further comprises a power driving device, and the power driving device is connected to the foam pump.

Further, the power driving device comprises a motor and/or an uninterruptible driving device, the uninterruptible driving device comprises a diesel engine, a generator and an uninterruptible power supply, the diesel engine is connected to the generator, and the generator is connected to the uninterruptible power supply.

Furthermore, a foam stock solution output port is formed in the bottom of the foam liquid tank, a valve is arranged at the foam stock solution output port, and the valve is a manual ball valve, an electric regulating valve or a vibration ball valve.

Furthermore, the foam stock solution pipeline and the proportioning mixer are both made of 304 stainless steel.

Compared with the prior art, the numerical control metering type foam proportional mixing device is characterized in that a first pressure transmitter and a first electromagnetic flowmeter are arranged in a water pipeline, a second pressure transmitter, a second electromagnetic flowmeter and a flow regulating valve are arranged on a foam stock solution pipeline, and a third pressure transmitter and a pressure regulating valve are arranged in a foam stock solution backflow pipeline, so that water parameter control of each pipeline is realized, the pressure of water and the flow of water at the inlet of a proportional mixer are effectively detected, the foam stock solution using amount in the foam stock solution pipeline is regulated through the flow regulating valve and the pressure regulating valve, the accurate proportioning of a foam mixed solution is realized, and foam stock solutions with different concentrations can be used as required; because first pressure transmitter, first electromagnetic flowmeter, second pressure transmitter, flow control valve, second electromagnetic flowmeter, third pressure transmitter and pressure control valve are connected with the next machine respectively, communicate through host computer and next machine, realize each electromagnetic flowmeter, pressure transmitter, flow control valve, the control of pressure control valve, the guarantee passes through the pressure and the flow of water, realizes real-time supervision and the remote monitoring to the foam mixing ratio, the measurement fire water, the quantity of fire control foam. The utility model provides a numerical control metering type foam proportion mixing device which is simple in structure, realizes accurate proportioning of foam stock solution and water by adjusting a flow regulating valve and a pressure regulating valve, and realizes real-time monitoring and remote monitoring of foam mixing proportion by communicating an upper computer and a lower computer.

Drawings

FIG. 1 is a schematic view of the overall connection of the present invention;

FIG. 2 is a schematic diagram of the structure of the present invention;

fig. 3 is a schematic diagram of the connection between the upper computer and the lower computer according to the present invention.

In the figure: 1. the system comprises an upper computer, a lower computer, a proportioning mixer, a foaming stock solution pipeline, a water pipeline, a foaming liquid return pipeline, a foaming liquid pump, a foaming liquid tank, a first pressure transmitter, a first electromagnetic flowmeter, a second pressure transmitter, a second electromagnetic flowmeter, a flow regulating valve, a third pressure transmitter, a pressure regulating valve, a control cabinet and a controller, wherein the upper computer 2, the lower computer 3, the proportioning mixer 4, the foaming stock solution pipeline 5, the water pipeline 6, the foaming liquid return pipeline 7, the foaming liquid pump 8, the foaming liquid tank 9, the first pressure transmitter 10, the first electromagnetic flowmeter 11, the second pressure transmitter 12, the second electromagnetic flowmeter 13, the flow regulating valve 14, the third pressure transmitter 15, the pressure regulating valve 16 and the control cabinet.

Detailed Description

The utility model will be further explained with reference to the drawings.

As shown in fig. 1, 2 and 3, the numerical control metering type foam proportion mixing device comprises an upper computer 1, a lower computer 2, a proportion mixer 3, a foam stock solution pipeline 4, a water pipeline 5, a foam solution return pipeline 6, a foam solution pump 7 and a foam solution tank 8;

the output end of the water pipeline 5 is connected with the first input end of the proportioner 3, and a first pressure transmitter 9 and a first electromagnetic flowmeter 10 are arranged in the water pipeline 5;

the input end of the foam liquid pump 7 is connected to the output port of the foam liquid tank 8, the output end of the foam liquid pump is connected to the second input end of the proportioning mixer 3 through a foam stock solution pipeline 4, and a second pressure transmitter 11, a second electromagnetic flowmeter 12 and a flow regulating valve 13 are arranged in the foam stock solution pipeline 4;

one end of the foam liquid return pipeline 6 is connected to the output end of the foam liquid pump 7, the other end of the foam liquid return pipeline is connected to the return port of the foam liquid tank 8, and a third pressure transmitter 14 and a pressure regulating valve 15 are arranged in the foam liquid return pipeline 6;

the first pressure transmitter 9, the first electromagnetic flowmeter 10, the second pressure transmitter 11, the flow regulating valve 13, the second electromagnetic flowmeter 12, the third pressure transmitter 14 and the pressure regulating valve 15 are respectively connected with the lower computer 2;

the lower computer 2 is connected to the upper computer 1, preferably, the lower computer 2 is a PLC, and the upper computer 1 can be an industrial personal computer touch screen. The lower computer 2 is arranged in the control cabinet 16.

When the numerical control metering type foam proportional mixing device is used, the input end of a water pipeline 5 can be connected with a fire-fighting water supply pipeline, water supplied by the fire-fighting water supply pipeline is conveyed into a proportional mixer 3 through the water pipeline 5, a first pressure transmitter 9 can detect the pressure of water at the inlet of the proportional mixer 3, a first electromagnetic flowmeter 10 can detect the flow of the water entering the proportional mixer 3, a lower computer 2 can acquire the pressure of the water and the flow of the water, a foam liquid tank 8 is used for storing foam raw liquid, a foam liquid pump 7 can convey the foam raw liquid in the foam liquid tank 8 into a foam raw liquid pipeline 4 through a foam liquid pump, and the foam raw liquid is conveyed into the proportional mixer 3 through the foam raw liquid pipeline 4 to be mixed with the water;

as an example, the bottom of the foam liquid tank 8 is provided with a foam raw liquid output port, the foam raw liquid output port can be provided with a valve, the output or stop of the foam raw liquid is controlled by the valve, and the valve can be a manual ball valve, an electric regulating valve or a vibration ball valve, which is not limited herein;

second pressure transmitter 11 can detect the pressure of the foam stoste in foam stoste pipeline 4, second electromagnetic flowmeter 12 can measure the flow of the foam stoste in foam stoste pipeline 4, first pressure transmitter 9 can be gathered to next computer 2, first electromagnetic flowmeter 10, the test data of second pressure transmitter 11 and second electromagnetic flowmeter 12, and adjust the aperture of flow control valve 13 and the aperture of pressure regulating valve 15 based on above-mentioned test data, so that the ratio of the foam stoste quantity in foam stoste pipeline 4 and the water in conduit 5 satisfies the demand, realize the accurate ratio of foam mixed liquid, can use the foam stoste of different concentrations as required, can accurately measure the quantity of fire water and foam. The flow control valve 13 adjusts the output amount of the foam concentrate, and if the electromagnetic flowmeter measures that the flow of the foam concentrate is excessive, the lower computer 2 can adjust the opening of the pressure control valve 15 of the foam concentrate return pipe 6 to convey the excessive foam concentrate from the return port to the foam liquid tank 8, and the third pressure transmitter 14 can detect the pressure of the returned foam concentrate in the foam concentrate return pipe 6. The upper computer 1 is communicated with the lower computer 2, the lower computer 2 can transmit the acquired detection result to the upper computer 1, and the upper computer 1 can remotely display the detection data to realize real-time monitoring, remote transmission and monitoring of the foam mixing ratio.

In some embodiments of the application, a numerical control metering type foam proportion mixing device can access a fire control system, the fire control system receives a fire alarm and then transmits the fire alarm to a lower computer 2 in a control cabinet 16, and the lower computer 2 can automatically start each electric valve arranged in a foam stock solution pipeline 4 and a backflow pipeline according to a control instruction, so that automatic preparation of foam mixed solution is realized. Each valve arranged in the water delivery pipeline is controlled by a fire control system, and after receiving a fire alarm, the fire control system controls the water delivery pipeline to open the valve so as to access fire water supply; fire control water supply and foam stoste form the mixed liquid of foam through proportional mixer and spout outward, can avoid the flood peak in the front, reduce the emergence of sudden dangerous situations such as detonation and boiling over, and the security is better.

The upper computer 1 provides a human-computer interface to complete monitoring of an operator on equipment of the numerical control metering type foam proportion mixing device, status signals of the equipment are collected through the lower computer PLC, the communication is transmitted to the upper computer 1, the status signals are displayed by the upper computer 1, the operation on process equipment on a picture of the upper computer 1 is transmitted to the lower computer PLC through the communication, and the PLC sends out operation instructions of the equipment.

In some embodiments of the present application, a numerically controlled metered foam proportioning device further comprises a power drive connected to the foam pump 7.

In some embodiments of the present application, the power drive comprises an electric motor and/or a diesel engine.

In some embodiments of the present application, the foam concentrate pipe 4 and the proportioner 3 are both made of 304 stainless steel. The foam stock solution is alkalescent and has slight corrosivity, and can be corroded and rusted with long-term use, and the core components (such as the proportioning mixer 3 and the foam stock solution pipeline 4) of the numerical control metering type foam proportioning mixing device are made of 304 stainless steel materials, so that the corrosion resistance of the product can be improved.

Claims (5)

1. A numerical control metering type foam proportion mixing device is characterized by comprising an upper computer (1), a lower computer (2), a proportion mixer (3), a foam stock solution pipeline (4), a water pipeline (5), a foam solution return pipeline (6), a foam solution pump (7) and a foam solution tank (8);

the output end of the water pipe (5) is connected with the first input end of the proportioner (3), and a first pressure transmitter (9) and a first electromagnetic flowmeter (10) are arranged in the water pipe (5);

the input end of the foam liquid pump (7) is connected to the output port of the foam liquid tank (8), the output end of the foam liquid pump is connected to the second input end of the proportioning mixer (3) through a foam stock solution pipeline (4), and a second pressure transmitter (11), a second electromagnetic flowmeter (12) and a flow regulating valve (13) are arranged in the foam stock solution pipeline (4);

one end of the foam liquid return pipeline (6) is connected to the output end of the foam liquid pump (7), the other end of the foam liquid return pipeline is connected to the return port of the foam liquid tank (8), and a third pressure transmitter (14) and a pressure regulating valve (15) are arranged in the foam liquid return pipeline (6);

the first pressure transmitter (9), the first electromagnetic flowmeter (10), the second pressure transmitter (11), the flow regulating valve (13), the second electromagnetic flowmeter (12), the third pressure transmitter (14) and the pressure regulating valve (15) are respectively connected with the lower computer (2);

the upper computer (1) is connected with the lower computer (2).

2. A numerically controlled metered foam proportioning device according to claim 1 further comprising a power drive connected to the foam pump (7).

3. A numerically controlled metered foam proportioning device according to claim 2 wherein the powered drive means comprises an electric motor and/or an uninterruptible drive means comprising a diesel engine, a generator and an uninterruptible power supply, the diesel engine being connected to the generator and the generator being connected to the uninterruptible power supply.

4. A numerical control metering type foam proportion mixing device according to claim 1 or 3, wherein a foam stock solution outlet is arranged at the bottom of the foam solution tank (8), and a valve is arranged at the foam stock solution outlet and is a manual ball valve, an electric regulating valve or a vibration ball valve.

5. A numerically controlled metering foam proportioning device according to claim 4, wherein the foam feed liquid pipe (4) and the proportioning device (3) are both made of 304 stainless steel.

Images