SU744485A1

SU744485A1 - Flowrate stabilizer for multichannel gas samplers

Info

Publication number: SU744485A1
Application number: SU762434933A
Authority: SU
Inventors: Павел Ильич Бреслер; Наталия Николаевна Волынская; Руслан Петрович Клюев
Original assignee: Всесоюзный Научно-Исследовательский И Конструкторский Институт Научного Приборостроения
Priority date: 1976-12-20
Filing date: 1976-12-20
Publication date: 1980-06-30

Description

Изобретение относится к стабилизаторам расхода и может применяться в устройствах для отбора и дозирования проб воздуха или газов с целью контроля их состава.The invention relates to flow stabilizers and can be used in devices for sampling and dosing air or gas samples in order to control their composition.

Наиболее близким к изобретению является устройство для стабилизации расхода, включающее корпус с воздухонагревателями и стабилизирующими элементами и термостат.Closest to the invention is a device for stabilizing the flow, comprising a housing with air heaters and stabilizing elements and a thermostat.

Недостатком такого устройства является низкая стабилизация расхода, так как использование воздушного термостата приводит к неравномерности температуры из-за недостаточной теплопередачи.The disadvantage of this device is the low stabilization of flow, since the use of an air thermostat leads to temperature unevenness due to insufficient heat transfer.

Цель изобретения — повышение стабилизации расхода путем повышения точности термостатирования.The purpose of the invention is to improve the stabilization of flow by increasing the accuracy of thermostating.

Это достигается тем, что в предлагаемом стабилизаторе воздухонагреватель снабжен сменными радиаторами, выполненными в виде втулки с отверстиями и установленными в корпусе.This is achieved by the fact that in the proposed stabilizer, the air heater is equipped with replaceable radiators, made in the form of a sleeve with holes and installed in the housing.

Кроме того, стабилизирующие элементы могут быть выполнены в виде втулок с параллельно расположенными отверстиями.In addition, the stabilizing elements can be made in the form of bushings with parallel holes.

На чертеже показан описываемый стабилизатор, общий вид.The drawing shows the described stabilizer, General view.

Стабилизатор состоит из корпуса 1, термостата 2, воздухонагревателя 3, сменных радиаторов 4, выполненных в виде втулок с отверстиями и установленных в корпусе 1, стабилизирующих элементов 5, выполненных в виде втулок с параллельно расположенными отверстиями, датчика 6 термостата, блока 7 мембранного насоса с насосом 8, вакуумметром 9 и выходной емкостью 10 и блока 11 управления и сигнализации.The stabilizer consists of a housing 1, a thermostat 2, an air heater 3, replaceable radiators 4, made in the form of bushings with holes and installed in the housing 1, stabilizing elements 5, made in the form of bushings with parallel holes, a sensor 6 of the thermostat, a unit 7 of a membrane pump with a pump 8, a vacuum gauge 9 and an output tank 10 and a control and alarm unit 11.

Устройство работает следующим образом.The device operates as follows.

Включается насос 8, который за время, пренебрежимо малое по сравнению с продолжительностью цикла отбора пробы, создает в выходной емкости 10 разрежение, соответствующее режиму критического истечения. Выходная емкость 10 служит для сглаживания пульсаций давления, а вакууметр 9 — для контроля давления. Поток воздуха поступает в стабилизатор расхода, где, проходя через отверстия радиатора 4, приобретает температуру термостата 2, после чего проходит через стабилизирующие элементы 5, задающие необходимое значение” расхода. Термостатирование стабилизатора расхода осуществляется термостатом 2 с помощью датчика 6 (например, ртутного термоконтактора) и воздухонагревателя 3. Продолжительность цикла отбора с необходимой точностью устанав744485 ливается блоком 11 управления и сигналиции.The pump 8 is turned on, which during a negligible time compared to the duration of the sampling cycle creates a vacuum in the output tank 10 corresponding to the critical flow mode. The output tank 10 serves to smooth out pressure pulsations, and the vacuum gauge 9 serves to control the pressure. The air flow enters the flow stabilizer, where, passing through the openings of the radiator 4, it acquires the temperature of the thermostat 2, after which it passes through the stabilizing elements 5, which set the required flow rate. The thermostat of the flow stabilizer is controlled by thermostat 2 using a sensor 6 (for example, a mercury thermal contactor) and an air heater 3. The duration of the sampling cycle is set with the required accuracy by 744485 by the control and signaling unit 11.

Claims

I

The invention relates to flow stabilizers and can be used in devices for sampling and dosing air or gas samples in order to control their composition.

Closest to the invention is a device for stabilizing the flow, comprising a housing with air heaters and stabilizing elements and a thermostat.

The disadvantage of this device is the low stabilization of the flow rate, since the use of an air thermostat leads to uneven temperature due to insufficient heat transfer.

The purpose of the invention is to increase the stabilization of the flow rate by increasing the accuracy of thermostating.

This is achieved by the fact that, in the proposed stabilizer, the heater is equipped with replaceable radiators made in the form of a sleeve with holes and installed in the housing.

In addition, the stabilizing elements can be made in the form of sleeves with parallel holes.

The drawing shows the described stabilizer, a General view.

The stabilizer consists of body 1, thermostat 2, air heater 3, replaceable

radiators 4, made in the form of sleeves with holes and installed in the housing 1, stabilizing elements 5, made in the form of sleeves with parallel holes, thermostat sensor 6, block 7 of the diaphragm pump with pump 8, vacuum gauge 9 and output capacity 10 and block 11 control and alarm.

10 The device operates as follows.

The pump 8 is turned on, which, for a time that is negligible compared to the duration of the sampling cycle, creates a vacuum in the output capacitance 10 corresponding to the critical outflow mode. The output tank 10 serves to smooth the pressure pulsations, and the vacuum meter 9 to control the pressure. At 20 CENTURIES of air enters the flow stabilizer, where, the passage through the holes of the radiator 4, acquires the temperature of thermostat 2, after which it passes through the stabilizing elements 5, which set the required flow rate. The temperature stabilization of the flow rate stabilizer is carried out by a thermostat 2 using a sensor 6 (for example, a mercury thermocontactor) and an air heater 3. The cycle time

30 selection with the required accuracy is set by the control and signaling unit 11.

Formula

Inventions 1. Stabilizer

flow rate for multichannel gas samplers, including a housing with air heaters and stabilizing elements and a thermostat, characterized in that

increasing the flow rate stabilization by increasing the accuracy of thermostating; the heater is equipped with replaceable radiators made in the form of bushings with holes and installed in the housing.

2. A stabilizer according to Claim 1, characterized in that the stabilizing elements are made in the form of sleeves with parallel holes.