A high-multiple foam generator for dust suppression and a foam dust suppression device

Abstract

The utility model discloses a high multiple foam generator and foam dust falling device for dust falling belong to dust falling technical field, it includes the cylinder shell, the front end of cylinder shell is equipped with the foam export, and the rear end is equipped with the liquid inlet pipe, characterized in that: the cylinder shell is equipped with the breather pipe, and the front end of breather pipe stretches from the foam export, and the front end of breather pipe is the gas outlet, and the rear end is the air inlet, and the air inlet pipe and the cylinder shell form the foaming chamber, and the foaming chamber is filled with the foaming net, and the lateral wall of breather pipe is equipped with the gas outlet group that communicates the rear part of foaming chamber. The generator can utilize the high -speed flow of gas to form the negative pressure in the outer periphery of gas outlet, thereby pumping the foam of foam export and discharging quickly, and the pumping of gas replaces the pushing of foam in prior art by the pressure of gas and foaming liquid, thereby can greatly reduce the dosage of foaming liquid, and reduce the waste of foam stock solution and water.

Description

Technical Field

[0001] This utility model belongs to the field of dust suppression technology, specifically relating to a high-expansion foam generator and foam dust suppression device for dust suppression. Background Technology

[0002] Large-scale open work sites such as road construction and mining generate a large amount of dust, causing pollution to the surrounding environment. With increasingly stringent environmental protection requirements, corresponding dust control measures are required. Currently, most dust suppression methods use spraying, which atomizes water into small droplets, wets the dust, increases its weight, and causes it to fall, thereby reducing dust dispersion and achieving the purpose of dust control. However, this method of dust suppression consumes a lot of water, resulting in a certain degree of water waste.

[0003] Therefore, people discovered that foam not only has a large coverage area due to its large volume, but also has good adhesion and wetting ability, which can effectively reduce dust. Furthermore, it requires little water, leading to research on foam generators for dust control. Patent CN115581876A discloses a gas-liquid coaxial jet foam generator, which includes an air inlet pipe, a liquid inlet pipe, a gas equalization chamber, a gas distribution and rectification orifice plate, a dispersion and rectification orifice plate, a nozzle at the end of the liquid inlet pipe, a foaming net, a foaming chamber, and a foam outlet. Gas enters the gas equalization chamber from the air inlet pipe, is evenly supplied through the gas distribution and rectification orifice plate, and reaches the foaming chamber. The foam mixture flows in from the water inlet pipe embedded in the center of the gas distribution and rectification orifice plate, passes through the dispersion and rectification orifice plate, and is ejected from the nozzle at the end of the liquid inlet pipe. The turbulent jet travels to the foaming net, where it is fully mixed with the gas in the foaming chamber to produce foam, which is then output from the foam outlet. Although this foam generator makes full use of the driving pressure of the air and water sources and eliminates the gas-liquid reversal component in the foaming device, greatly reducing the resistance loss in the mixing and foaming process, it still relies mainly on the driving pressure of the air and water sources to output foam, and the required water volume is still relatively large. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a high-expansion foam generator and foam dust suppression device for dust suppression, thereby increasing the foaming ratio and reducing water consumption.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: a high-expansion foam generator for dust suppression is designed, including a shell, a foam outlet at the front end of the shell and a liquid inlet pipe at the rear end. The characteristic is that a vent pipe is inserted inside the shell, the front end of the vent pipe extends from the foam outlet, the front end of the vent pipe is an air outlet and the rear end is an air inlet, the air inlet pipe and the shell form a foaming cavity, the foaming cavity is filled with a foaming net, and an air outlet group communicating with the rear of the foaming cavity is opened on the side wall of the vent pipe.

[0006] Preferably, the number of air outlet groups is two or more, and the two or more air outlet groups are arranged along the axis of the vent pipe.

[0007] Preferably, each air outlet group has two or more air outlets, and the air outlets in the same group are distributed along the circumference of the vent pipe.

[0008] Preferably, the foam outlet is connected to a foam guide tube, and the air outlet is located at the rear of the foam guide tube.

[0009] Preferably, the foaming net is a metal wire mesh, cotton fiber mesh, or / and nylon mesh.

[0010] This utility model also provides a foam dust suppression device, including a foam branch, in which a foam generator is provided. The foam generator is a high-expansion foam generator for dust suppression, the foam outlet is connected to a foam nozzle, the air inlet is connected to an air supply mechanism, and the liquid inlet pipe is connected to a liquid supply mechanism.

[0011] Preferably, the air supply mechanism is an air compressor, which is connected to the air inlet via an air passage, and a first one-way valve is provided on the air passage.

[0012] Preferably, the liquid supply mechanism includes a mixing tank, and the outlet of the mixing tank is connected to the inlet pipe through a delivery pipe.

[0013] Preferably, the infusion tube is equipped with a liquid distributor, the inlet end of which is connected to the outlet of the mixing tank. The liquid distributor has two or more outlet branches, one of which is connected to the inlet pipe of a foam branch. A second one-way valve is provided on the outlet branch.

[0014] Preferably, the mixing tank is connected to the foam concentrate container via a first pipeline, and a concentrate pump and a third one-way valve are sequentially installed on the first pipeline from back to front.

[0015] Preferably, the mixing tank is also connected to a water supply assembly via a second pipeline. The water supply assembly includes a switch valve, a booster pump, and a flow meter connected in sequence. The flow meter is connected to the mixing tank, and the switch valve is connected to the water pipe network.

[0016] Preferably, the water network is a tap water network, and the tap water network is connected to the switch valve through a filter.

[0017] Preferably, the switching valve is a solenoid valve.

[0018] Compared with the prior art, the beneficial effects of this utility model are: 1. Since the front end of the vent tube extends from the foam outlet, and the front end of the vent tube is the air outlet and the rear end is the air inlet, the high-speed flow of gas can be used to create a negative pressure around the air outlet, thereby drawing the foam out of the foam outlet quickly, reducing the amount of foam collapse during the discharge process, thus increasing the foaming ratio. Furthermore, the gas suction replaces the existing technology that relies on the pressure of gas and foaming liquid to push the foam, which can greatly reduce the amount of foaming liquid used and reduce the waste of foam concentrate and water.

[0019] 2. Since there are two or more air outlet groups, and these two or more air outlet groups are arranged along the axis of the vent pipe, each air outlet group has two or more air outlets. The air outlets in the same group are distributed along the circumference of the vent pipe, which can enhance the uniformity of gas entering the foaming chamber and facilitate uniform foaming.

[0020] 3. Since the foam outlet is connected to a foam guide pipe and the air outlet is located at the rear of the foam guide pipe, the direction of foam delivery can be constrained, making it easy to connect to the foam nozzle through the pipeline.

[0021] 4. Since the air inlet is connected to the air supply mechanism and the liquid inlet pipe is connected to the liquid supply mechanism, the gas and foaming liquid in the foam generator can be automatically and mechanically supplied, which is convenient to use.

[0022] 5. Using an air compressor in the air supply system can improve the cost-effectiveness of the dust suppression equipment, while the first one-way valve in the air line can constrain the flow direction of the gas and improve the stability of the system.

[0023] 6. Because the infusion tube is equipped with a liquid distributor, the inlet end of the liquid distributor is connected to the outlet of the mixing tank. The liquid distributor has two or more outlet branches, one of which is connected to the inlet pipe of one foam branch. This allows the mixing tank to supply liquid to two or more foam branches at the same time, which increases the foam spraying area while simplifying the structure and reducing costs as much as possible.

[0024] 7. Since the mixing tank is connected to the foam concentrate container through the first pipeline, and the concentrate pump is installed on the first pipeline, and the water supply assembly is connected through the second pipeline, the water supply assembly includes a switch valve, a booster pump and a flow meter connected in sequence. The flow meter is connected to the mixing tank, and the switch valve is connected to the water network, so as to realize the mechanized automatic supply of water and foam concentrate in the mixing tank, improve the automation level of the device and facilitate its use.

[0025] 8. This utility model has an ingenious design that can output foam by pumping gas, which greatly reduces the amount of foaming liquid used and lowers the cost of use. It is worth promoting and using in the industry. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of a foam generator. Figure 2 yes Figure 1 A magnified view of part I in the middle.

[0027] Figure 3 This is a schematic diagram of a foam dust suppression device; Figure 4 This is a schematic diagram of the connection structure between the water supply component and the gas supply component.

[0028] The following are labeled in the diagram: 1. Foam nozzle; 2. Foam generator; 21. Foam guide pipe; 22. Vent pipe; 23. Foaming net; 24. Shell; 25. Liquid inlet pipe; 26. Air inlet; 27. Air outlet; 28. Air outlet hole; 3. Mixing tank; 4. Liquid distributor; 5. Second check valve; 6. Air compressor; 7. First check valve; 8. T-junction; 9. Flow meter; 10. Booster pump; 11. Solenoid valve; 12. Filter; 13. Foam concentrate container; 14. Concentrate pump; 15. Third check valve. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0030] Referring to the flow direction from back to front, this utility model defines the inlet end as the rear end and the outlet end as the front end; the side closer to the center of the foam generator 2 is defined as the inner side and the side farther from the center is defined as the outer side.

[0031] like Figure 1 As shown, this utility model has a foam outlet at the front end and a liquid inlet pipe 25 at the rear end of the foam generator shell 24. The foam outlet is connected to a foam guide pipe 21. A vent pipe 22 is installed inside the shell 24, with its upper end extending from the foam outlet and located behind the foam guide pipe 21. The front end of the vent pipe 22 is an air outlet 27, and the rear end is an air inlet 26. The air inlet pipe and the shell 24 form a foaming cavity, which is filled with a foaming net 23. Figure 2As shown, the side wall of the vent pipe 22 is provided with a group of air outlets that connect to the lower part of the foaming chamber. There are two or more groups of air outlets, which are arranged along the axis of the vent pipe 22. Each group of air outlets is provided with two or more air outlets 28, and the air outlets 28 in the same group are distributed along the circumference of the vent pipe 22. This allows the foaming liquid entering the foaming chamber through the inlet pipe 25 to form a liquid film on the foaming net 23. Only a small portion of the gas in the vent pipe 22 is ejected from the air outlet group, blowing the liquid film into bubbles, thus generating a large number of bubbles in the foaming net 23. Most of the gas in the vent pipe 22 escapes from the air outlet 27. Under the high-speed gas flow, a negative pressure is formed around the air outlet 27, which draws the bubbles in the foaming net 23 upward and carries them out of the foam guide pipe 21 by the high-speed gas. The gas pumping replaces the existing technology that relies on the pressure of gas and foaming liquid to drive the foam, thereby greatly reducing the amount of foaming liquid used and reducing the waste of foam concentrate and water.

[0032] like Figure 3 As shown, this invention also includes the aforementioned foam generator 2 in the foam branch, thereby forming a foam dust suppression device capable of having two or more foam branches. Specifically, a foam nozzle 1 is connected to the foam outlet of each foam generator 2, an air inlet 26 is connected to an air supply mechanism, and a liquid inlet pipe 25 is connected to a liquid supply mechanism. The air supply mechanism is an air compressor 6, which is connected to the air inlet 26 via an air passage, and a first one-way valve 7 is provided on the air passage. The liquid inlet mechanism includes a mixing tank 3, whose outlet is connected to a liquid distributor 4 via a delivery pipe. This allows the inlet of the liquid distributor 4 to be connected to the outlet of the mixing tank 3 via a delivery pipe. The liquid distributor 4 has two or more outlet branches, one of which is connected to the inlet pipe 25 of the foam generator 2 in one of the foam branches. A second check valve 5 is provided on the outlet branch, meaning that a second check valve 5 is provided between the inlet pipe 25 and the liquid distributor 4. This allows the mixing tank 3 to supply liquid to two or more foam branches simultaneously, increasing the foam spraying area while simplifying the structure and reducing costs.

[0033] like Figure 4 As shown, the inlet of the mixing tank 3 is connected to the first port of the tee 8. The second port of the tee 8 is connected to the foam concentrate container 13 through the first pipeline. The concentrate pump 14 and the third check valve 15 are arranged sequentially from back to front on the first pipeline. The third port of the tee 8 is connected to the water supply assembly through the second pipeline. The water supply assembly is equipped with a solenoid valve 11, a booster pump 10 and a flow meter 9 connected in sequence. The flow meter 9 is connected to the mixing tank 3. The solenoid valve 11 is connected to the tap water network through the filter 12. In this way, the water and foam concentrate in the mixing tank 3 are automatically and mechanically supplied, which improves the automation level of the device and makes it easy to use.

[0034] The aforementioned foaming net 23 is a mature existing technology. Specifically, it can be made of metal wire mesh, cotton fiber mesh, or nylon mesh, or any combination of two or more of these materials. In addition to using solenoid valve 11 as the on / off valve, a mechanical ball valve, a solenoid regulating valve with regulating function, or a manual regulating valve can also be used.

[0035] The working process of this utility model is as follows: Open solenoid valve 11 and raw material pump 14 to inject foam raw material and water into mixing tank 3. The mass ratio of water to foam raw material is 1000:1. The mixture is thoroughly mixed in mixing tank 3 to form a foaming solution, which is then supplied to foam generator 2. Air compressor 6 supplies air to foam generator 2. The gas and foaming solution generate foam in foam generator 2, which is then sprayed out from foam nozzle 1 for dust suppression. The volume of foam produced by this foam generator is 25 times that of the foaming solution, producing a larger volume of foam while reducing the ratio of foam raw material to water.

[0036] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from the scope of the technical solution of this utility model are not permitted.

Claims

1. A high-expansion foam generator for dust suppression, comprising a cylindrical shell, wherein a foam outlet is provided at the front end of the cylindrical shell and a liquid inlet pipe is provided at the rear end, characterized in that: A vent pipe is installed inside the shell. The front end of the vent pipe extends from the foam outlet. The front end of the vent pipe is an air outlet and the rear end is an air inlet. The air inlet pipe and the shell form a foaming cavity, which is filled with a foaming net. A group of air outlet holes communicating with the rear of the foaming cavity are opened on the side wall of the vent pipe.

2. The high-expansion foam generator for dust suppression according to claim 1, characterized in that: The number of air outlet groups is two or more, and the two or more air outlet groups are arranged along the axis of the vent pipe.

3. The high-expansion foam generator for dust suppression according to claim 2, characterized in that: Each group of vents has two or more vents, and the vents in the same group are distributed circumferentially along the vent pipe.

4. The high-expansion foam generator for dust suppression according to any one of claims 1 to 3, characterized in that: The foam outlet is connected to a foam guide tube, and the air outlet is located at the rear of the foam guide tube.

5. A foam dust suppression device, comprising a foam branch line, wherein a foam generator is provided in the foam branch line, characterized in that: The foam generator is a high-expansion foam generator for dust suppression as described in any one of claims 1 to 4, with the foam outlet connected to a foam nozzle, the air inlet connected to an air supply mechanism, and the liquid inlet pipe connected to a liquid supply mechanism.

6. The foam dust suppression device according to claim 5, characterized in that: The air supply mechanism is an air compressor, which is connected to the air inlet through an air passage, and a first one-way valve is provided on the air passage.

7. The foam dust suppression device according to claim 6, characterized in that: The liquid supply mechanism includes a mixing tank, and the outlet of the mixing tank is connected to the inlet pipe through a delivery pipe.

8. The foam dust suppression device according to claim 7, characterized in that: The infusion tube is equipped with a liquid distributor. The inlet end of the liquid distributor is connected to the outlet of the mixing tank. The liquid distributor has two or more outlet branches. One outlet branch is connected to the inlet pipe of one foam branch. A second one-way valve is provided on the outlet branch.

9. The foam dust suppression device according to claim 7 or 8, characterized in that: The mixing tank is connected to the foam concentrate container via a first pipeline, and a concentrate pump and a third one-way valve are installed sequentially from back to front on the first pipeline.

10. The foam dust suppression device according to claim 9, characterized in that: The mixing tank is also connected to a water supply assembly via a second pipeline. The water supply assembly includes a switch valve, a booster pump, and a flow meter connected in sequence. The flow meter is connected to the mixing tank, and the switch valve is connected to the water pipe network.

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