Automatic sampler for oil tanker unloading and sampling

Abstract

The invention discloses an automatic sampler for oil tanker unloading and sampling, comprising: an operation unit for completing operations such as parameter setting, running and stopping, and data display of the sampler; a detection unit for detecting the amount of unloaded oil signal, and send the oil discharge signal to the control unit; the control unit is used to receive the oil discharge signal, and when the oil discharge reaches the set value, it drives the execution unit to complete the sampling operation according to the sampling parameters set by the operation unit; The execution unit is used to control the quantitative rotation of the stepper motor connected to it through the control unit, so as to drive the sampling piston device connected to the stepper motor to perform one expansion and contraction to complete quantitative sampling. The front end of the sampling piston device is an annular gap, which is installed on the oil discharge pipeline. Due to the annular sampling structure, the sample outlet and the oil discharge pipeline are kept isolated during the sampling process. The invention solves the problem of difficult sampling according to quantity during the oil unloading process of the tank truck, and is suitable for sampling operation during the airtight oil unloading process.

Description

technical field [0001] The invention relates to the technical field of testing, in particular to an automatic sampler for oil tank truck unloading and sampling. Background technique [0002] Sampling and testing water content is an important link in the delivery of oil by tank trucks. At present, the sampling method for unloading oil by tank trucks is basically manual. The upper, middle and lower levels are sampled at a ratio of 1:3:1 or 2:6:2. Such sampling has many disadvantages. For example, the water at the bottom of the tanker must be drained first, and it needs to be weighed again; the sampling ratio is 1:3:1 or 2:6:2 according to the upper, middle and lower levels, the sampling frequency is small, and the representativeness of the sample is poor; when the bottom water of the tanker is not clean It is very likely that all the water is taken in the first sampling, and the timing of sampling is difficult to grasp; it is completely manual operation, and the operator nee...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the technical problem that it is difficult to take samples according to the amount of unloaded oil in the process of unloading oil from tank trucks, the present invention provides an automatic sampler for unloading oil from tank trucks. Since the oil unloading pipeline is always isolated from the outside during the entire sampling process, The present invention is especially suitable for the sampling operation in the closed oil unloading process. The present invention introduces the crude oil flowing out from the tank truck into the vertical sampling pipeline of the oil unloading pipeline equipped with an automatic sampler for oil unloading and sampling of the tank truck.

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