Back-blowing anti-blocking multi-point constant-speed powder sampling device applied to horizontal pipeline

Abstract

The invention discloses a back-blowing anti-blocking multi-point constant-speed powder sampling device applied to a horizontal pipeline. One end of a sampling pipe is closed, and the other end of thesampling pipe is butted against and communicated with a hollow shaft. A plurality of sampling nozzles facing the powder flowing direction are mounted on the sampling pipe. One end of the hollow shaftis closed, and the other end of the hollow shaft is connected with an inlet of a cyclone separator through a sampling communication pipe. A collecting bottle is installed at an outlet in the bottom ofthe cyclone separator, a dead steam outlet in the top of the cyclone separator is communicated with an entrance in the side face of an air extractor, an inlet of the air extractor is communicated with a pressure gauge through a pressure reducing valve, and an outlet of the air extractor is communicated with an independent air chamber in a shell. An outer static pressure tapping pipe is connectedto the independent air chamber, an inner static pressure tapping pipe is communicated to the sampling communication pipe, a compressed air source is communicated with a pressure gauge, and the outer static pressure tapping pipe and the inner static pressure tapping pipe are connected with a U-shaped pipe pressure gauge or an electronic micromanometer. The device can achieve constant-speed sampling, and meanwhile sampling has representativeness.

Description

technical field [0001] The invention belongs to the field of powder material pneumatic conveying pipeline sampling, and relates to a multi-point constant velocity powder material sampling device for back blowing and anti-blocking applied to horizontal pipelines. Background technique [0002] In the powder pneumatic conveying system, it is often necessary to sample the powder in the pipeline for relevant laboratory analysis. The powder pneumatic conveying system is generally under positive pressure. Although there are many samples taken by direct spraying sampling through the opening of the pipe wall, it is difficult to guarantee the representativeness of the sampling; although the mobile sampling device can ensure the representativeness of the sampling, it is inconvenient to operate and the workload of the sampling personnel Large, and the sealing is difficult to guarantee during operation, which is easy to cause environmental pollution, and the environment of combustible po...

AI Technical Summary

Problems solved by technology

The powder pneumatic conveying system is generally under positive pressure. Although there are many samples taken by direct spraying sampling through the opening of the pipe wall, it is difficult to guarantee the representativeness of the sampling; although the mobile sampling device can ensure the representativeness of the sampling, it is inconvenient to operate and the workload of the sampling personnel Large, and the sealing is difficult to guarantee during operation, which is easy to cause environmental pollution, and the environment of combustible powder like coal powder has certain explosion-proof requirements; the fixed sampling device is prone to wear and tear when it is used for a long time. It is also prone to clogging of the sampling hole

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