SU821980A1

SU821980A1 - Pressure transmitter in pipeline

Info

Publication number: SU821980A1
Application number: SU792779084A
Authority: SU
Inventors: Александр Ходжидович Абульфат; Фарух Насирджанович Масуми; Олег Бертгольдович Пейтер
Original assignee: Таджикский политехнический институт
Priority date: 1979-06-13
Filing date: 1979-06-13
Publication date: 1981-04-15

Description

Изобретение относится к измери- — тельной технике и может найти применение при измерении давления в трубопроводах без разборки и нарушения их герметизации, например для измерения давления в трубопроводах дизельных двигателей.The invention relates to measuring equipment and may find application in measuring pressure in pipelines without disassembling and breaking their sealing, for example, for measuring pressure in pipelines of diesel engines.

Известен датчик давления, содержащий надетые на трубу механический держатель с чувствительным к усилителю элементом ^1].A known pressure sensor containing worn on a pipe mechanical holder with a sensitive element to the amplifier ^ 1].

Недостатком .устройства является то, что конструкция неразборна.The disadvantage of the device is that the design is not separable.

Наиболее близким по технической сущности и достигаемому ^результату к 15 предложенному является устройство, содержащее упругий элемент в виде двухколенного держателя с перемычкой и образованными комками и этой перемычкой клиновидным пазом с вер- 20 шиной клина, обращенной к перемычке, и чувствительный элемент Ϊ.2 ].The closest in technical essence and the achieved result to 15 proposed is a device containing an elastic element in the form of a two-knee holder with a jumper and formed lumps and this jumper with a wedge-shaped groove with a wedge top facing the jumper and a sensitive element Ϊ.2] .

Недостатком данного устройства является невысокая надежность ввиду наличия дополнительных разъемных сое динений, необходимых для крепления датчика.The disadvantage of this device is its low reliability due to the presence of additional detachable connections necessary for mounting the sensor.

Цель изобретения - повышение надежности устройства.The purpose of the invention is to increase the reliability of the device.

(51 )М. Кл.³ (51) M. Cl. ³

G 01 L 23/24G 01 L 23/24

G 01 L 23/12 (53) УДК 531.787 (088.8)G 01 L 23/12 (53) UDC 531.787 (088.8)

Указанная цель достигается тем, что с одной стороны переьички выполнено сквозное отверстие, образующее с контуром клина фиксирующие выступы для трубопровода, а с противоположной стороны выполнен дополнительный паз, в котором размещен чувствительный элемент, выполненный в виде ферромагнитного кольца с обмоткой.This goal is achieved by the fact that, on one side of the bridge, a through hole is made, which forms fixing protrusions for the pipeline with the wedge contour, and an additional groove is made on the opposite side, in which the sensing element is made in the form of a ferromagnetic ring with a winding.

На чертеже представлен датчик, общий вид.The drawing shows a sensor, General view.

Предложенный датчик содержит упругий элемент 1, пережгчку упругого элемента 2, колено 3, сквозное отверстие 4, фиксирующие выступы 5, дополнительный паз 6, ферритовое, кольцо 7 о обмоткой 8, упругую диафрагму 9.The proposed sensor contains an elastic element 1, punching of the elastic element 2, the elbow 3, the through hole 4, the locking protrusions 5, an additional groove 6, a ferrite ring 7 about the winding 8, an elastic diaphragm 9.

Датчик работает следующим образом.The sensor operates as follows.

В рабочем положении датчик надевают на трубопровод через клиновидную часть паза 3, образованную коленами 1 и 2, и фиксируют в отверстии 4 с помощью фиксирующих выступов 5. Изме25 нение диаметра трубопровода, вызванное давлением топлива в последнем, с помощью упругой диафрагмы 9 приводит к изменению размеров паза 6, который в свою очередь вызывает деформацию ферритового кольца 7 с обмот3In the working position, the sensor is put on the pipeline through the wedge-shaped part of the groove 3, formed by the elbows 1 and 2, and fixed in the hole 4 using the fixing protrusions 5. Changing the diameter of the pipeline caused by the fuel pressure in the latter, using the elastic diaphragm 9, leads to a change in size groove 6, which in turn causes deformation of the ferrite ring 7 with winding 3

321980 кой 8. Деформация ферритового кольца приводит к изменению его магнитнойпроницаемости, т.е. к изменению индуктивности обмотки. Благодаря диафрагме 9 и выступам 5 трубопровод жестко закреплен в отверстии 4, что поз- , воляет отказываться от фиксирующих болтовых соединений, тем самым исключается влияние на коэффициент преобразования датчика люфтов резьровых соединений, т.е. повышается . _п стабильность коэффициента преобразо- ¹⁰вания.321980 coy 8. The deformation of a ferrite ring leads to a change in its magnetic permeability, i.e. to a change in the inductance of the winding. Thanks to the diaphragm 9 and the protrusions 5, the pipeline is rigidly fixed in the hole 4, which allows you to abandon the fixing bolt connections, thereby eliminating the influence on the conversion coefficient of the backlash sensor of thread connections, i.e. rises. _n stability of the conversion factor ¹⁰ .

Наличие клиновидной части паза и отсутствие крепящих винтов упрощает и повышает надежность крепления датчика на трубопроводе, особенно в 15 труднодоступных местах. Датчик имеет более высокую точность при преобразовании статических давлений по сравнению с пьезоэлектрическими, у которых из-за растекания заряда ко- 20 эффициенг преобразования уменьшается по времени.The presence of the wedge-shaped part of the groove and the absence of fixing screws simplifies and increases the reliability of mounting the sensor on the pipeline, especially in 15 hard-to-reach places. The sensor has a higher accuracy in the conversion of static pressures compared to piezoelectric pressures, in which, due to the spreading of the charge, the conversion coefficient decreases in time.

Claims

1 The invention relates to a measurement technique and can be used in measuring pressure in pipelines without disassembling and breaking them, for example, for measuring pressure in diesel engine pipelines. A pressure sensor is known that contains a mechanical holder mounted on the pipe with an amplifier-sensitive element 111. A disadvantage of the device is that the structure is not separable. The closest in technical essence and achievable; the result to the proposed is a device containing an elastic element in the form of a two-knee holder with a bridge and formed wedges and this bridge with a wedge-shaped groove with a wedge tip facing the crush and a sensitive element t2l. The disadvantage of this device is low reliability due to the presence of additional detachable joints required for mounting the sensor. The purpose of the invention is to increase the reliability of the device. This goal is achieved by the fact that on the one side of the perforation a through hole is formed, forming locking protrusions for the pipeline with a wedge contour, and on the opposite side there is an additional groove in which a sensing element made in the form of a ferromagnetic ring with a winding is placed. The drawing shows the sensor, the overall appearance. The proposed sensor contains an elastic element 1, re1Zh1chku elastic element 2, knee 3, through hole 4, fixing the protrusions 5, additional groove 6, ferrite ring 7 3 winding 8, the elastic diaphragm 9. The sensor works as follows. In the working position, the sensor is put on the pipeline through the wedge-shaped part, groove 3, OB1), which is located on elbows 1 and 2, and is fixed in the hole 4 with the help of locking lugs 5. The change in the diameter of the pipeline caused by the fuel pressure in the latter, using changing the size of the groove 6, which in turn causes the deformation of the ferrite ring 7 with the winding 8. The deformation of the ferrite ring leads to a change in its magnetic. Preditsae tsdtsti to a change in winding inductance. Due to the diaphragm 9 and the protrusions 5, the pipeline is rigidly fixed in the hole 4, which allows the fixing of the bolt joints to be rejected, thereby eliminating the effect on the conversion coefficient of the backlash sensor of threaded connections, i.e. the stability of the conversion coefficient is improved. The presence of the wedge-shaped part of the groove and the absence of fastening screws simplifies and improves the reliability of the sensor mounting on the pipeline, especially in hard-to-reach places. The sensor has a higher accuracy in converting static pressures compared to piezoelectric, in which the conversion coefficient decreases with time due to charge spreading. Claims A pressure sensor in a pipeline contains an elastic element in the form of a two-knee holder with a jumper and formed by the knees and this jumper with a wedge-shaped groove with a wedge apex facing; -mill, and a sensitive element characterized in that / in order to increase reliability the device by eliminating the need for additional detachable connections, on the one side of the jumper, a through hole is formed, forming with the wedge contour locking protrusions for the pipeline, and the opposite side an additional groove is made in which the sensing element is placed in the form of a ferromagnetic ring with a winding. Sources of information taken into account in the examination 1. Application of Germany No. 27.47.949, cl. G 01 L 23/12, publ. 03.05.78.

2. For the UK of UK No. 1372030, cl. G 01 L 9/08, published 10/30/74 (prototype).