Balanced proportional mixing device

Abstract

A balanced type proportional mixing device comprises a mixed liquid pipe body and a foam liquid pipe body, a liquid inlet pipe is arranged at the top of the foam liquid pipe body, a liquid inlet control assembly is arranged at the top of the liquid inlet pipe, and the top of the liquid inlet control assembly is connected with water inlet pressure; the foam liquid pipe body comprises a vertical pipe and a horizontal pipe; a positioning sleeve is arranged in the horizontal pipe, an elastic water blocking assembly is arranged between the inner wall of the horizontal pipe and the outer wall of the positioning sleeve in a sleeved mode, and when the elastic water blocking assembly is extruded by water inlet pressure to contract, a liquid passing channel is formed among the horizontal pipe, the elastic water blocking assembly and the positioning sleeve. The foam liquid passes through the liquid passing channel, flows out from one end, facing the water outlet direction, of the horizontal pipe, and is mixed with pressure water entering between the outer wall of the horizontal pipe and the inner wall of the mixed liquid pipe body to form mixed liquid. In the invention, the injection amount of the foam liquid and the water inlet flow are linearly changed through the elastic water blocking assembly, so that the pressure loss is reduced, and the flow range of the whole device is expanded.

Description

technical field [0001] The invention relates to the technical field of fire fighting equipment, in particular to a balanced proportional mixing device. Background technique [0002] The foam proportional mixing device is the "nerve center" of the foam fire extinguishing system, and its working performance is directly related to the success or failure of the foam fire extinguishing system in extinguishing fires. [0003] The caliber of the water inlet pipe and the caliber of the foam liquid inlet in the existing proportional mixing device are fixed, resulting in a relatively large pressure loss, resulting in a relatively small change in the flow range (generally no more than 60L), and the applicable occasions are limited. Contents of the invention [0004] Based on this, the object of the present invention is to provide a balanced proportional mixing device, which can expand the flow range and adapt to more occasions. [0005] A balanced proportional mixing device, compris...

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Problems solved by technology

[0003] The caliber of the water inlet pipe and the caliber of the foam liquid inlet in the existing proportional mixing device are fixed, resulting in a relatively large pressure loss, resulting in a relatively small change in the flow range (generally no more than 60L), and the applicable occasions are limited.

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