SU138080A1 - A device for signaling the clogging of a fiber transporting pipeline - Google Patents

Description

Known devices for signaling clogging of a condenser or throat of a fiber transporting pipeline, made in the form of a pressure meter, equipped with a pressure sensing spring-loaded diaphragm connected by a lever transmission with an arrow indicating the pressure on the fixed scale.

The proposed device is more sensitive than the known ones. The device uses: a radioactive isotope attached to the pressure head, for example, strontium-90, a radio emission counter irradiated by it, connected via an integrating chain to the input of an electronic power amplifier with an electromagnetic relay output, including an alarm or an executive warning mechanism and blocking the pipeline by stopping condenser; Parallel to the scale of the instrument, a screen moved with a handle is installed, allowing the meter to be irradiated after the set pressure has been reached.

The drawing shows the electrical circuit of the device.

The device is a redesigned flow meter of the type HM-890 with a scale of 0.40 mm of water. Art. with radioactive sensor and electronic relay unit. The measured pressure is supplied to the diaphragm and is balanced by the force of its elasticity and the flat spring,

An aluminum wire is attached to the pressure gauge parallel to its scale, at the end of which there is a radioactive isotope, for example, strontium-90. An Isotope-irradiated counter of the CTC-5 type radio emission is installed next to the scale. Between the isotope and the counter, a steel screen is installed parallel to the scale;

No. 138080-2 allows full absorption of beta particles; This screen is moved by means of a handle, which makes it possible to tune the device to generate a signal at any static pressure value of 1; a region of 10-35 mm of water. Art. The electronic relay unit of the device is designed to convert the radioactive radiation entering the meter into a certain value of the electric current necessary for the operation of an electromagnetic relay of the type MKU-48, including an alarm or an actuator to prevent the pipeline from clogging with fiber.

The electrical circuit of the device includes the following main elements: an STS-5 type counter, an integrating chain and a power amplifier. The meter is switched on consistently with load resistances 1 and R. As long as no beta particles fall on the meter, all the voltage of the power source falls on the meter, and the voltage drop across the resistance R is zero. When beta particles hit the counter, a current pulse passes through it, the resistance of the counter drops significantly, and the voltage drop across resistance R increases. Thus, on the load resistance R, when beta particles enter the meter, voltage pulses of positive polarity appear. These pulses are applied to an integrating chain connected to the counter, on the capacitor With which a voltage is obtained that is proportional to the intensity of the beta radiation detected by the counter.

The resulting voltage is applied to the control grid of a 6P14P type electron tube used as a power amplifier. In the anode circuit of this lamp is included the winding of the electromagnetic relay MKU-48, clamped by the capacitor Cj. The device is powered by a power transformer Tr.

During normal operation of the pipeline transporting the fiber, the isotope of strontium-90 on the arrow of the device is blocked by a screen and the beta particles do not fall on the counter. In this case, the 6P14P lamp is locked, the MKU-48 relay is de-energized and the device does not generate a pulse. At the time of pipeline clogging with a fiber, the static pressure increases, the arrow with the isotope of strontium-90 goes beyond the edge of the screen, and the beta particles begin to hit the counter. A voltage appears on the integrating cell C that compensates for the negative bias on the control grid of the 6П14П lamp, and the latter is unlocked. The relay is triggered and the device generates a pulse used to stop the fiber entering the condenser: by automatically lifting the working chambers of the fiber-separator battery or stopping the saw cylinders of these machines.

With a further increase in the static head, the pulse output does not stop as the counter continues to be irradiated with beta particles of the radioactive isotope. After the closure of the pipeline by the fiber is eliminated, the static pressure in it drops, the instrument arrow goes off the screen and the impulse output stops.

The described device is of low inertia and works within 0.5-1 sec. The device can also be used in other areas of the industry for issuing a pulse at the moment of increasing the set value of the static head, which can be regulated within 10-35 mm of water. Art.

Subject invention

A device for signaling the clogging of a condenser or throat of a fiber transporting pipeline, made in the form of a pressure meter, equipped with a pressure sensitive spring-loaded diaphragm connected by a lever transmission with an arrow indicating pressure on a fixed scale, characterized in that it is attached to an arrow to increase sensitivity. a radioactive isotope, for example, strontium-90, a radio emission counter irradiated by it, an electron attached to the input th power amplifier with the output electromagnetic relay comprising a signaling or preventing clogging of the actuator when the input fiber by a condenser, and installed in parallel schkale movable handle screen, allowing counter irradiation after reaching the set pressure.

CTC-5

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