A jet self-priming foaming agent parallel foaming system

Abstract

The invention discloses a jet flow self-absorption foaming agent parallel foaming system. The jet flow self-absorption foaming agent parallel foaming system comprises a proportioning mixer (5), at least two foam generators (11), a water inlet joint (1), an air inlet joint (7), a pressure ventilation pipe (9), a foam distributor (13) and a liquid absorbing pipe (15) connected with the proportioning mixer (5), wherein the at least two foam generators are connected by adopting a parallel connection manner, inlets of the foam generators connected in parallel are connected with outlets of the proportioning mixer, foam observing holes (12) are formed in the outlets of the foam generators connected in parallel, the outlets of the foam generators connected in parallel are connected with the foam distributor; one end of the pressure ventilation pipe divides a flow for each foam generator and supplies air to each foam generator through a flow divider valve; check valves A are arranged on the pressure ventilation pipe and the front end of the flow divider valve; a water volume regulating valve and an air volume regulating valve are respectively arranged on a high-pressure water pipe and the pressure ventilation pipe. The jet flow self-absorption parallel foaming system has the advantages of reducing the pressure loss, improving the system stability, increasing the pressure of the outlets of the foam generators, and enhancing the drive capability, and is suitable for borehole operation.

Description

technical field [0001] The invention relates to a foaming system, in particular to a jet self-priming foaming agent parallel foaming system, which belongs to the technical field of foam dust reduction and the like. Background technique [0002] As a gas-liquid mixed medium, foam has the characteristics of both gas and liquid. It not only has good cooling performance, but also has the expansion characteristics of gas, and has excellent flow and accumulation performance. Both goaf fire and roadway open fire have a very significant fire extinguishing effect, which is more effective than conventional nitrogen injection, grouting and water mist fire extinguishing. For this reason, many scholars at home and abroad have constructed different types of foam generation systems for efficient and stable foam preparation. [0003] At present, there are many patents related to the foam generation system, such as: [0004] 1. The Chinese patent "Coal Mine Inert Gas Foam Fire Extinguishin...

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Problems solved by technology

[0004] 1. The Chinese patent "Coal Mine Inert Gas Foam Fire Extinguishing System" published on January 2-3, 2008 (application number: 200610043170.3, publication number: 101108271), consists of a proportional mixer and a foam generator. The blowing agent is sucked under pressure, and the foam generator is a mesh structure; the system has a large pressure loss, and the outlet pressure of the mesh foamer is low, especially when the foam is poured at a high point for a long distance underground, the problem of insufficient pressure often occurs ; And single Venturi suction is prone to throat blockage, low reliability

[0005] 2. The Chinese patent "Compressed Air Foam Fire Extinguishing System for Vehicles" published on September 30, 2009 (Application No.: 200910131152.4, Publication No.: 101543669), uses vehicle-mounted pressurized water and foam liquid to be pre-mixed, and the compressed air flow is then mixed with the foam mixture to generate fire. The foaming method adopts a fully automatic control method to generate foam. The system has a good control over the accuracy of the foaming agent addition ratio and can achieve quantitative control. However, there are also shortcomings in the reliability of the system and the overall pressure loss of the foaming system. At the same time, the applicability of the system is greatly limited, and it is not suitable for working in complex underground environments.

[0006] 3. The U.S. patent "Apparatus and method for generating high quality foam using anaireductor" published on October 16, 1998 (application number: 173933, publication number: 6010083), which uses downhole high-pressure water as the driving force to add foaming agent, and the strong negative pressure generated by high-pressure water, the external A large amount of air is introduced, and efficient foaming is carried out through the packing material at the end. The foaming process does not require compressed air, and the applicability is wider. However, because the outlet pressure of the device is too small, the foam injection effect is not good. Therefore, its In the end, a booster pump (Boosterpump) was added at the outlet, which undoubtedly increased the possibility of explosion of on-site electrical appliances

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