CN114558266A - A fixed fast mixing device with a proportional mixer connected to a fire hydrant - Google Patents

Abstract

The invention discloses a fixed fast mixing device in which a proportional mixer is connected with a fire hydrant, comprising a balanced proportional mixer, a water-based foam fire extinguishing device and a fire hydrant. The balanced proportional mixer is connected to a fire hydrant through a water source pressure lifting device The balance proportional mixer is connected with the water-based foam fire extinguishing device, and the water source pressure raising device controls the pressure and flow of the water flowing out of the fire hydrant. The invention mainly utilizes the pressure of the fire hydrant pipeline, combined with a balance proportional mixer to change the premixed water-based foam into a working state with uniform pressure and flow rate, and controls the precise and rapid pressure regulation of the foam liquid; the balance valve ensures the stability of the mixing ratio, Fast mixing of water-based foam liquids is achieved.

Description

A fixed fast mixing device with a proportional mixer connected to a fire hydrant

technical field

The invention relates to the field of fire fighting equipment, in particular to a fixed fast mixing device in which a proportional mixer is connected with a fire hydrant.

Background technique

With the upgrading of fire-fighting equipment and the continuous improvement of people's safety awareness, fire-fighting technology is facing higher challenges, and it also promotes the development of fire-fighting equipment in a more intelligent direction. The existing fire fighting equipment is mainly based on water spray system and oil discharge and nitrogen injection fire extinguishing system, but the water spray fire extinguishing system has a large demand for water, and the fire pump room and fire pool and other facilities occupy a large area, and the investment is relatively high; The oil discharge and nitrogen injection pipeline of the nitrogen injection fire extinguishing system are directly connected to the transformer body. Leakage can easily cause the device to malfunction or the transformer to fail. There is no follow-up cooling or fire extinguishing measures.

SUMMARY OF THE INVENTION

Purpose of the invention: In view of the above problems, the present invention is a fixed rapid mixing device with a proportional mixer connected to a fire hydrant, which utilizes the pressure of the fire hydrant pipeline to suck back the foam fire extinguishing liquid in the foam liquid tank to form a stable fire extinguishing reserve mixed liquid , to provide raw material guarantee for the fire extinguishing system.

Technical scheme: a fixed rapid mixing device with a proportional mixer connected to a fire hydrant of the present invention includes a balanced proportional mixer, a water-based foam fire extinguishing device and a fire hydrant, and the balanced proportional mixer is passed through a water source pressure lifting device Connected with the fire hydrant, the balanced proportional mixer is connected with the water-based foam fire extinguishing device, and the water source pressure raising device controls the pressure and flow of the water flowing out of the fire hydrant.

Further, the main pipe of the balance proportional mixer is connected to the fire water inlet directly above, the branch pipe of the balance proportional mixer is connected to the manual ball valve of the foam liquid pipe, and the balance proportional mixer is located where the manual ball valve of the foam liquid pipe is located. on the main pipe of the branch pipe.

Further, the water source pressure raising device is arranged between the fire water inlet signal butterfly valve and the fire hydrant, and the water source pressure raising device is connected to the fire water inlet pipe and the expanding pipe of the water inlet joint.

Further, a balance valve is provided just above the manual ball valve of the foam liquid pipe, and the two are on the same branch pipe. The top of the branch pipe is provided with an electromagnetic start valve for connecting the foam liquid tank, and the balance valve is located in the electromagnetic start valve. On the branch pipe between the manual ball valve of the foam liquid pipe.

Further, a mixed liquid outlet signal butterfly valve is arranged directly above the balanced proportional mixer, the mixed liquid outlet signal butterfly valve is located in the main pipeline, and the mixed liquid outlet signal butterfly valve is connected with the water-based foam fire extinguishing device; the The balance valve includes a nozzle, an orifice plate, a throat pipe and a diffuser pipe arranged in sequence.

Further, the water-based foam fire extinguishing device is connected with a storage tank of the water-based foam liquid, and the bottom of the box is provided with a guide rail to cooperate with a roller on the carrier.

Further, a pressure switch debugging valve is arranged on the branch pipe of the fire water inlet signal butterfly valve.

Beneficial effects:

1. The present invention mainly uses the pressure of the fire hydrant pipeline, combined with a balanced proportional mixer to change the premixed water-based foam into a working state with uniform pressure and flow rate, and controls the precise and rapid pressure regulation of the foam liquid, and the mixing ratio reaches 3% to 3.9% ;

2. The balance valve ensures the stability of the mixing ratio and realizes the rapid mixing of water-based foam liquid;

3. Suck back the foam fire extinguishing liquid in the foam liquid tank, and then premix the fire fighting water and the foam liquid to form a fire extinguishing reserve mixture, which provides raw material guarantee for the fire extinguishing system;

4. The premixed liquid and fire extinguishing can be carried out at the same time, making the fire extinguishing system more efficient and sustainable, and the improved devices and functions of each part can also provide new technologies for fire fighting;

5. It is connected with fire hydrants, which increases the ability to adapt to fire fighting and fire fighting in different scenarios, and expands the ability and scope of fire fighting and fire fighting.

Description of drawings

Fig. 1 is the structural representation of the present invention;

Figure 2 is a schematic diagram of the principle of the balance valve;

Fig. 3 is the working flow chart of the present invention;

Detailed ways

As shown in Figure 1, a fixed rapid mixing device with a proportional mixer connected to a fire hydrant shown in this embodiment includes a balanced proportional mixer 3, a water-based foam fire extinguishing device and a fire hydrant, and a balanced proportional mixer 3 is connected to the fire hydrant through the water source pressure lifting device, the balance proportional mixer 3 is connected to the water-based foam fire extinguishing device, and the water source pressure lifting device controls the pressure and flow of the water flowing out of the fire hydrant.

The main pipe of the balance proportional mixer 3 is connected to the fire water inlet directly above, the lower left branch pipe of the balance proportional mixer 3 is connected to the manual ball valve 22 of the foam liquid pipe, and the balance proportional mixer 3 is located where the manual ball valve 22 of the foam liquid pipe is located. On the main pipeline of the branch pipeline, the water-based foam mixed liquid formed by the balanced proportional mixer 3 is discharged to the water-based foam fire extinguishing device through the mixed liquid outlet butterfly valve directly above.

The water source pressure lifting device is arranged between the fire water inlet signal butterfly valve 10 and the fire hydrant. The water source pressure lifting device is connected to the fire water inlet pipe and the expanding pipe of the water inlet joint, and the free circulation of fire water can be realized between the two pipes, thereby To achieve the purpose of increasing water pressure.

The foam liquid pipe manual ball valve 22 is provided with a balance valve 16 just above, and the two are on the same branch pipe. The top of the branch pipe is provided with an electromagnetic start valve 15 for connecting the foam liquid tank. The balance valve 16 is located between the electromagnetic start valve 15 and the valve. On the branch pipe between the manual ball valve 22 of the foam liquid pipe. As shown in FIG. 2 , the balance valve 16 includes nozzles, orifices, throats and diffusers arranged in sequence. When the fire-fighting pressure water q1 passes through the nozzles, a pressure drop is formed between the nozzle outlet and the throat due to the action of the jet, and simultaneously Under the action of the pressure difference, the foam liquid with the flow rate q ₂ passes through the orifice plate and enters the throat and diffuser together with the pressure water q ₁ to form a stable foam mixture. The formula for calculating the mixing ratio is as follows:

In the formula, R is the mixing ratio; A is the orifice area, in m2; μ is the flow coefficient of the orifice plate; D is the diameter of the pipeline before the nozzle inlet, in m; d is the diameter at the nozzle outlet, in m .

The fire hydrant is connected to the balance proportional mixer 3, and the pressure sustaining pressure relief valve and the pressure balance valve 16 are used to realize the balance between the pressure of the foam liquid entering the balance valve 16 and the fire pressure water before the nozzle of the mixer, and the precise design of the foam liquid Rapid pressure regulation, the mixing ratio reaches 3% to 3.9%. Finally, the water-based foam fire extinguishing liquid based on the fire fighting water in the fire hydrant is formed by mixing by the fire pump, so as to achieve the effect of the fire hydrant and the balanced proportional mixer 3 working together to extinguish the fire.

The mixed liquid outlet signal butterfly valve 1 is arranged directly above the balanced proportional mixer 3, the mixed liquid outlet signal butterfly valve 1 is located in the left main pipeline, and the mixed liquid outlet signal butterfly valve 1 is connected with the water-based foam fire extinguishing device, and the discharged premixed liquid It is directly connected to the storage tank of the water-based foam fire extinguishing device to provide raw material supply for fire fighting. An outlet axial pressure gauge 2 is arranged on the right branch pipe. A pressure switch 4 is arranged on the main pipeline, which is connected to the balanced proportional mixer 3 , and a pressure switch on-off valve 5 is arranged below the pressure switch 4 . The main pipeline is provided with drip valve 6, water inlet pressure gauge 7, deluge alarm valve 8, deluge alarm valve 8 is connected with reset ball valve 11, reset ball valve 11 is set to normally closed, pressure switch debugging valve 9 is set to normally closed, fire water The inlet signal butterfly valve 10 is set to be normally open, the anti-reset relay 12, the deluge valve cavity pressure gauge 13, the emergency start ball valve 14 are connected to the main pipeline through a branch, the emergency start ball valve 14 is set to be normally closed, the electromagnetic pneumatic valve 15 It is set to be normally closed, and the foam liquid solenoid valve 17 is set to be normally closed. Vertical check valve 18, drain pipe manual ball valve 19, Y-type filter 20 and foam liquid axial pressure gauge 21 are connected to the branch pipe of the electromagnetic start valve. The manual ball valve of the foam liquid pipe is set to normally open.

The water-based foam fire extinguishing device is connected with a storage tank of the water-based foam liquid, and the bottom of the box is provided with a guide rail to cooperate with the rollers on the carrier. A pressure switch debugging valve 9 is provided on the branch pipe of the fire water inlet signal butterfly valve 10, which is directly used to assist in increasing the pressure of the fire water inlet.

The work flow shown in Figure 3 is: when the working signal is given, after the central water supply control cabinet receives the signal that the fire extinguishing equipment is in place, the pressurization operation starts the fire hydrant, and at the same time, the foam liquid solenoid valve 17 in the foam pump group is activated in a chain. , pressurize the foam liquid pipeline. The pressure water and foam liquid flow into the pressure water inlet and foam liquid inlet of the proportional mixer in the foam deluge valve group respectively. The foam liquid and water are quickly mixed by 3% after passing through the proportional mixer, and the foam mixture is output from the outlet of the mixer. , for fire fighting equipment. The system control can also send a signal to open the deluge valve and the foam solenoid valve immediately after receiving the fire alarm signal.

During the premixing process of fire fighting water and foam liquid, the flow of fire fighting water fluctuates after being pressurized by the high-efficiency plunger pump, which will cause the mixing ratio R of the foam mixed liquid to change. speed, can not achieve the purpose of fast and efficient, to ensure the stability of the R value and to achieve the purpose of rapid mixing of water-based foam liquid.

Claims (7)

1. A fixed rapid mixing device with a proportional mixer connected with a fire hydrant is characterized by comprising a balanced proportional mixer (3), a water-based foam fire extinguishing device and the fire hydrant, wherein the balanced proportional mixer (3) is connected with the fire hydrant through a water source pressure lifting device, the balanced proportional mixer (3) is connected with the water-based foam fire extinguishing device, and the water source pressure lifting device controls the pressure and the flow of water flowing out of the fire hydrant.

2. The rapid mixing device according to claim 1, wherein the main pipe of the balanced proportioner (3) is connected with a fire water inlet directly above, the branch pipe of the balanced proportioner (3) is connected with the foam pipe manual ball valve (22), and the balanced proportioner (3) is positioned on the main pipe of the branch pipe where the foam pipe manual ball valve (22) is positioned.

3. The rapid mixing device according to claim 1, wherein the water source pressure raising device is provided between the fire water inlet signal butterfly valve (10) and the fire hydrant, the water source pressure raising device connecting the fire water inlet pipe and the expanding pipe of the water inlet joint.

4. The rapid mixing device according to claim 2, characterized in that a balancing valve (16) is arranged above the manual bubble-liquid tube ball valve (22), both are arranged on the same branch pipe, the top end of the branch pipe is provided with an electromagnetic starting valve (15) for connecting the bubble-liquid tube, and the balancing valve (16) is arranged on the branch pipe between the electromagnetic starting valve (15) and the manual bubble-liquid tube ball valve (22); the balance valve (16) comprises a nozzle, an orifice plate, a throat pipe and a diffusion pipe which are arranged in sequence.

5. A flash mixing device according to claim 1, characterized in that a mixed liquor outlet signal butterfly valve (1) is arranged directly above the balanced proportioner (3), the mixed liquor outlet signal butterfly valve (1) being located in the main pipe, the mixed liquor outlet signal butterfly valve (1) being connected to the water-based foam fire extinguishing device.

6. The rapid mixing device of claim 1, wherein the water-based foam fire extinguishing device is connected with a storage tank of water-based foam liquid, and the bottom of the box body is provided with a guide rail which is matched with and connected with a roller on a vehicle.

7. The rapid mixing device according to claim 3, characterized in that a pressure switch adjusting valve (9) is arranged on the branch pipe of the fire water inlet signal butterfly valve (10).

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