Gas mixing device with excellent mixing effect

Abstract

The invention discloses a gas mixing device with excellent mixing effect. The gas mixing device is designed to be bilaterally symmetric, and comprises main gas inlet pipes, mixed gas inlet pipes, mixing pipes, cone-shaped flow guide pipes, a mixing chamber, and a gas exhaust pipe; the mixing chamber is arranged at the middle part of the gas mixing device; from the two sides of the mixing chamber to the outer parts of the gas mixing device, the mixing chamber, the cone-shaped flow guide pipes, and the mixing pipes are connected successively; the gas exhaust pipe is connected with the edge of the mixing chamber; the wide mouth end of each of the cone-shaped flow guide pipes is connected with one end of a corresponding mixing pipe, and each of the main gas inlet pipes is arranged on the other end of a corresponding mixing pipe; the narrow mouth end of each of the cone-shaped flow guide pipes is connected with the middle parts of the end surfaces of the mixing chamber; each of the mixing pipes is provided with a mixed gas inlet pipe arranged with an angle of 90 DEG to a corresponding main gas inlet pipe; a plurality of gas distribution pipes are distributed in a cross section plane of the mixing pipes; one end of each of the gas distribution pipes is communicated with a corresponding main gas inlet pipe, and the other end is communicated with the mixing chamber via a corresponding cone-shaped flow guide pipe; and each of the gas distribution pipes is provided with at least one gas inlet hole. The gas mixing device is capable of realizing three times of mixing of gas; mixing effect is excellent; and mixed gas is capable of satisfying requirements on measurement and detection standard gas.

Description

technical field [0001] The invention relates to the technical field of gas mixing devices, in particular to a gas mixing device with good mixing effect. Background technique [0002] Most metrology institutes cannot prepare standard gases by themselves during the process of measuring and testing gas alarms. The current detection method is to purchase standard gases of different concentrations and pass them into the gas alarm for detection. This method occupies a large number of gas cylinders and causes waste of resources; during the detection process, the gas cylinders need to be replaced continuously, and the operation is cumbersome. [0003] Chinese patent CN202621045U discloses a gas mixer. The mixed gas enters the main air intake pipe that circulates the mainstream gas through the conical tubes distributed around the circumference and mixes, and then enters the mixing gas with a large volume and a built-in choke device through the shrinkage-type draft tube. The chamber ...

AI Technical Summary

Problems solved by technology

[0002] In the process of measuring and testing gas alarms, most metrology institutes cannot prepare standard gases by themselves.

The current detection method is to purchase standard gases of different concentrations and pass them into the gas alarm for detection. This method occupies a large number of gas cylinders and causes waste of resources; during the detection process, the gas cylinders need to be replaced continuously, and the operation is cumbersome

[0003] Chinese patent CN202621045U discloses a gas mixer. The mixed gas enters the main air intake pipe that circulates the mainstream gas through the conical tubes distributed around the circumference and mixes, and then enters the mixing gas with a large volume and a built-in choke device through the shrinkage-type draft tube. cavity, but the mixed gas cannot fully meet the requirements of standard gas for metering

[0004] Chinese patent CN100586543C also discloses a gas mixing device. Two gases are mixed and then output through a buffer chamber provided with a gas distribution pipe. The mixing speed is fast and the equipment is safe. However, the mixed gas still cannot fully meet the requirements of the standard gas for metering. Require

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