SU1488719A2 - Automated sampler - Google Patents

Description

The invention relates to automatic devices for sampling fluid from process piping, can be used in the refining, oil-producing

and petrochemical industry.

The purpose of the invention is the expansion of Funkts. national opportunities. Autosampler contains switch1 2

mode 1 reader, prohibition circuit 2, software pulse generator 3, turbine sensor 4 of fluid flow, divider 5 pulse number, vibrator 6, pulse counter 7, sampling unit 8, trigger 9, make contact 10, unit of sample number 11. cycle, comparator 12 and time relay 13. The installation of a unit 11 of a different number of samples in a cycle allows you to adjust the technology requirements to the number of samples when taking samples from certain volumes, thereby eliminating unnecessary sampling. As a result, energy consumption is reduced and the efficiency of working time is increased. The presence of time relay 13 makes it possible to start the sampler after a certain period of time by the trigger signal 9, which stops the selection of a given number of samples,.

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The invention relates to automatic devices for sampling fluid from process piping can be used in the oil refining, oil producing and petrochemical industries and is an improvement of the known sampler according to ed. St.

No. 711420.

The purpose of the invention is to expand the functionality of the sampler (the selection of a predetermined number of single samples in the cycle, limiting the "idle" periods of operation of the sampling node and preparing the sampler for a new cycle without operator intervention).

The drawing shows the block diagram of the automatic sampler. _e The autosampler contains a switch of 1 modes, a circuit; mu 2 prohibition, software generator 3 pulses, turbine sensor 4 flow rate, divider 5 number of pulses, vibrator 6, counter 7 pulses, sampling unit 8, trigger 9, closing contact 10, unit 11 of the installation of the number of samples in the cycle, comparator 12 and relay 13 time.

The unit 11 for setting the number of samples in a cycle can be performed on software switches of type ΠΠΙΟι-ΧΒ and integrated circuits K155PR6. The comparator 12 may be made according to one of the known schemes, which allows to compare two signals. Relay 13 time implemented on the transistors KT315.

Automatic sampler works as follows.

Sampling is performed periodically at certain time intervals, the beginning of which is determined by the position of the closing contact 10 (circuit closure).

The control input of the inhibit circuit 2 after the closure of the contact 10 receives an enable signal from the output of the flip-flop 9. The signal input of the inhibit circuit 2 is passed depending

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from the position of the switch 1 modes signals from the program generator 3 pulses, or, if sampling is carried out in proportion to the flow rate of fluid through the pipeline, from the turbine sensor 4 flow rate, the number of pulses from which is divided by divider 5.

If there is a permitting signal at the control-input of the circuit 2, the pulses from the signal input pass to the inputs of the vibrator 6 and the pulse counter 7, the Vibrator 6 turns on the sampling node 8, and the counter 7 counts the number of switching on of the sampling node 8. When the number of switching on of the sampling node 8 coincides with the number of samples in the cycle set by block 11, the comparator 12 generates a signal arriving at the counting input of the trigger 9, which changes to another state opposite to the one specified by the closure of the contact 10 at a certain moment . At the control input of circuit 2 of the prohibition, a prohibitory signal appears (circuit 2 closes). The passage of pulses on the vibrator 6 and the counter 7 is terminated. At the same time, the signal from trigger 9 starts the relay 13, ko-. Secondly, after a specified period of time, it affects the closing contact 10 — new cycles of the automatic sampler start up,

Claims (1)

Claims of the invention Automatic sampler auth. St. 7 '711420, characterized in that, in order to expand its functionality, it additionally contains a time relay, a unit for setting the number of samples in a cycle and a comparator connected by inputs with a unit for setting the number of samples in a cycle and with the output of a pulse counter, and the output with counting trigger input, the output of which is additionally connected to the control input of the time relay installed in the closing contact control circuit, Romannikova 40 45 50