Fluid sampling device and sampling pipe heat tracing device

Abstract

The invention discloses a fluid sampling device and a sampling pipe heat tracing device. The sampling pipe heat tracing device comprises a medium self-flowing pipe; an inlet and an outlet are respectively formed in the two ends of the medium self-flowing pipe, and a connector is arranged in the middle; the inlet and the outlet are communicated with a main pipeline; the connector is communicated with a sampling tube; the end surface of the inlet is an incident flow surface of a medium in the main pipeline; and the end face of the outlet is a back flow face of the medium in the main pipeline. According to the sampling pipe heat tracing device, the medium in the main pipeline can form differential pressure at the inlet and the outlet of the medium self-flowing pipe, and then part of the medium in the main pipeline enters from the inlet and flows out from the outlet, so that heat of the medium is efficiently transferred to the end, far away from the main pipeline, of the sampling pipe. The sampling pipe heat tracing device not only solves the problem that the pressure measuring point of the main pipeline is easy to freeze, but also does not need to be additionally supplied with energy from the outside, thereby reducing the energy consumption of a factory and greatly simplifying the later maintenance operation.

Description

technical field [0001] The invention relates to the measurement field, in particular to a sampling tube heating device. It also relates to a fluid sampling device, comprising the above-mentioned heating device for the sampling tube. Background technique [0002] In thermal power generation and chemical industries, it is often necessary to use pressure-taking pipelines such as figure 1 The pressure-taking tube 02 shown on the equipment pipeline is as follows: figure 1 Each measuring point in the shown main pipeline 1 is sampled and tested. Especially in the thermal power generation and chemical industry in the north, due to the low temperature in winter, it is very easy to cause the sampling tube 02 to freeze, which will affect the pressure monitoring of related equipment and pipelines. [0003] For this reason, at present, the armored heating cable 03 is often used to heat and keep the sampling tube 02 to avoid freezing of the sampling tube 02. The heating principle of t...

AI Technical Summary

Problems solved by technology

The heating principle of the armored heating cable 03 is that the resistance wire is energized to generate heat. The resistance wire is easily damaged due to aging, corrosion, and cracking of the outer skin during long-term operation, which will lead to problems such as short circuit and open circuit.

In addition, the armored heating cable 03 consumes a lot of power and is not easy to install and maintain. Therefore, when the armored heating cable 03 is used to heat and keep the sampling tube 02, it not only needs to provide additional power, but also needs to invest a lot of manpower for later maintenance.

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