Sample dropping head and furnace door stopper assembly thereof

Abstract

The invention relates to a furnace door stopper assembly of a sample dropping head. The furnace door stopper assembly is used for a coal quality analyzer. The furnace door stopper assembly comprises a sliding cavity in a sample dropping head body, a slider slidably arranged in the sliding cavity, a furnace door stopper moving cavity arranged in the sample dropping head body, a furnace door stopper which is arranged in the furnace door stopper moving cavity and fixedly connected with the slider, a first gas inlet spout communicated with one end of the sliding cavity, a second gas inlet spout communicated with the other end of the sliding cavity, and a gas source communicated with the first gas inlet spout and the second gas inlet spout, wherein the furnace door stopper can be driven by the slider to open or seal a furnace door; oxygen or inert gas is stored in the gas source. By virtue of the furnace door stopper assembly, the reliable work is ensured and meanwhile the influence of a furnace door stopper driving device on a detection result is effectively eliminated. The invention also discloses a sample dropping head with the furnace door stopper assembly.

Description

technical field [0001] The invention relates to the technical field of elemental analysis, in particular to a sampling head and a furnace door plug assembly thereof. Background technique [0002] Elemental analysis is a means of identifying various elements in a substance and determining the content of each element. Most of the elemental analyzers currently on the market are automatic sampling systems, such as elemental analyzers for coal quality analysis. The sample head and the furnace detection system connected with the sample head. [0003] The so-called sample drop head is a device for the samples to be tested to fall into the furnace detection system. In the actual operation process, the sample does not directly enter the furnace detection system, but first enters the sample drop head by its own gravity. The furnace door plug in the sampling head catches the sample, and then purges the sample and the sample inlet channel, so as to clean up the air mixed in the sample ...

AI Technical Summary

Problems solved by technology

[0005] The air source of the cylinder is usually consistent with other pneumatic components, and nitrogen is used as the air source. However, nitrogen will have a greater impact on elemental analysis. When the cylinder reciprocates many times, its seals are prone to wear, and nitrogen leaks from the worn position. Finally, it is easy to enter the furnace detection system through the furnace door plug, which will cause the analysis results of the sample elements to be inaccurate; and the solenoid valve is easy to accelerate wear and malfunction in a dusty environment.

[0006] Therefore, how to ensure the reliable operation of the furnace door plug and effectively avoid the influence of the driving device of the furnace door plug on the detection results is a technical problem urgently needed by those skilled in the art.

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