SU787650A1

SU787650A1 - Sensor of longitudinal displacement

Info

Publication number: SU787650A1
Application number: SU742047348A
Authority: SU
Inventors: Анатолий Михайлович Шестопалов; Алексей Анатольевич Парамонов
Original assignee: Московский Ордена Трудового Красного Знамени Горный Институт
Priority date: 1974-07-17
Filing date: 1974-07-17
Publication date: 1980-12-15

Description

Изобретение относится к контрольно-измерительным средствам горного производства и может быть использова-, но для регистрации квазистатических и динамических перемещений в массиве горных пород, а также для измерения осадки крепи, положения деформируемых или подвижных узлов горных машин и пр. .The invention relates to control and measuring means of mining and can be used, but to register quasistatic and dynamic movements in the rock mass, as well as to measure the lining settlement, the position of deformable or moving nodes of mining machines, etc.

Известен измеритель перемещения, используемый для индикации расслоения кровли, содержащий реперный стержень, размещенный в направляющей трубе, закрепляемой в скважине, пробуренной из выработки в контролируемую кровлю.Величина расслоения кровли в этом измерителе отсчитывается по реперным меткам, нанесенным на стержне, расклиненном в скважине за областью возможного расслоения кровли £11 . 20Known displacement meter used to indicate stratification of the roof, containing a reference rod placed in a guide pipe fixed in a well drilled from a mine into a controlled roof. possible stratification of the roof £ 11. 20

Недостатком данного измерителя перемещения является невысокая точность.The disadvantage of this displacement meter is its low accuracy.

Наиболее близким техническим решением к данному изобретению является датчик продольных перемещений, содер- 25 жащий цилиндрический измерительный конденсатор с обкладками, несущим стержнем и диэлектрической втулкой [2]· Недостатком известного устройства является недостаточно высокая точность ДО кую втулку 4 и диэлектрическую коническую втулку 5. Закрепление цилиндрической обкладки 2 производится конической гайкой 6, поворачивающейся по резьбе на несущий стержень 3. Коническая гайка 6 подпирает диэлектрическую коническую втулку 5, которая входит в конус, имеющий на торцовой части цилиндрической обкладки 2. Благодаря встречному действию конического выступа , имеющегося на несущем стержне 3, диэлектрическая втулка 4 несколько распирается при завинчивании конической гайки 6, при этом осуществляется центровка и закрепление цилиндрической обкладки 2 относительно несущего стержня 3 и другой цилиндрической обкладки 1, имеющей скользящую насадку на несущем стержне 3. Элементы 1-6 конструкции образуют конденсаторный блок датчика. Электрическая схема датчика, осуществляющая преобразование величины емкости конденсатора датчика и электрический сигнал, размещена в пространстве между контргайкой 7 и ограничительным выступом стержня 8.The closest technical solution to this invention is a longitudinal displacement transducer containing a cylindrical measuring capacitor with plates, a supporting rod and a dielectric sleeve [2]. A disadvantage of the known device is the insufficient accuracy of the additional sleeve 4 and the dielectric conical sleeve 5. Fixing the cylindrical the plates 2 are made with a conical nut 6, which rotates threaded onto the supporting rod 3. The conical nut 6 supports the dielectric conical sleeve 5, which enters a cone having on the end part of the cylindrical plate 2. Due to the oncoming action of the conical protrusion on the supporting rod 3, the dielectric sleeve 4 is somewhat bursting when screwing the conical nut 6, while aligning and fixing the cylindrical plate 2 relative to the bearing rod 3 and the other a cylindrical plate 1 having a sliding nozzle on the supporting rod 3. Elements 1-6 of the structure form a capacitor block of the sensor. The electric circuit of the sensor, which converts the capacitance of the sensor capacitor and an electric signal, is placed in the space between the lock nut 7 and the restrictive protrusion of the rod 8.

Установка электрической схемы производится при отвинченном от конденсаторного блока 1-6 стержне 8, на который продвигают электрические платы, выполненные в виде дисков с центральным отверстием.Installation of the electrical circuit is performed when the rod 8 is unscrewed from the condenser unit 1-6, onto which electrical boards are promoted in the form of disks with a central hole.

Электрические платы прикрепляются распорками к ограничительному выступу стержня 8.Electric boards are attached by spacers to the restrictive protrusion of the rod 8.

Вывод электрического сигнала датчика и подвод электрического питания схеквл производится через проходные изоляторы и отверстия, имеющиеся в ограничительном выступе стержня 8, в скользящей втулке 9 и в шайбе 10. Проходные изоляторы и соответствующие отверстия на чертеже не показаны.The output of the electrical signal of the sensor and the supply of electric power is performed through bushing insulators and holes in the restrictive protrusion of the rod 8, in the sliding sleeve 9 and in the washer 10. The bushing insulators and corresponding holes are not shown in the drawing.

Для исключения проворачивания стержня 8 относительно корпуса 12 на стержне 8 имеется шпоночная канавка, в которую входит шпонка, закрепленная на скользящей втулке 9. Шпонка и шпоночная канавка на чертеже не показаны.To prevent rotation of the rod 8 relative to the housing 12 on the rod 8 there is a keyway, which includes a key mounted on the sliding sleeve 9. The key and keyway are not shown in the drawing.

Влагозащищенность электрической схемы датчика обеспечивается сальниковыми прокладками 11 и 12. Сальниковая прокладка 11 поджимается шайбой 10. Уплотнение прокладки 12 обеспечивается втулкой 13, ввинчиваемой в стержень 3.Moisture-proof electrical circuit of the sensor is provided by stuffing box gaskets 11 and 12. The stuffing box gasket 11 is pressed by a washer 10. The gasket 12 is sealed by a sleeve 13 screwed into the shaft 3.

Демпфированию датчика, а также дополнительной центровке цилиндрических обкладок 1 и 2 способствует диэлектрическая насадка 14, находящаяся на концевой части цилиндричес- кой обкладки 2.The damping of the sensor, as well as the additional alignment of the cylindrical plates 1 and 2, is facilitated by the dielectric nozzle 14 located on the end part of the cylindrical plate 2.

³ Для подстройки емкости датчика, выполняемой в процессе установки и калибровки, цилиндрическая обкладка 1 конденсатора датчика имеет резьбо. вое соединение с гайкой 15, закрепленной на корпусе 16. Подстройка выполняется путем вращения фланцевого выступа^обкладки 1 при отвинченной контргайке 17. ³ To adjust the sensor capacitance performed during installation and calibration, the cylindrical lining 1 of the sensor capacitor is threaded. connection with a nut 15 mounted on the housing 16. Adjustment is performed by rotating the flange ledge ^ of the lining 1 with the lock nut 17 unscrewed.

Фланцы, имеющиеся на концах конст15 рукции, служат для прикрепления распорных устройств, обеспечивающих установку в скважине или для присоединения удлинительных штанг.Сквозное центральное отверстие использует2Q ся для установки одного датчика или гирлянды из таких датчиков.The flanges available at the ends of the construction serve to attach spacers for installation in the well or to attach extension rods. A through center hole is used 2Q to install one sensor or a string of such sensors.

Claims

The invention relates to the instrumentation of mining production and can be used to record quasi-static and dynamic changes in the rock mass, as well as to measure the draft of the lining, the position of the deformable or moving parts of mining machines, etc. A displacement gauge is used, which is used to indicate a roof delamination, which contains a reference rod placed in a guide pipe fixed in a borehole, drilled from an outlet to a controlled roof. The value of the delamination of the roof in this gauge is counted by reference marks on the rod denoted in well beyond the area of possible roof delamination. The disadvantage of this displacement meter is low accuracy. The closest technical solution to this invention is a longitudinal displacement sensor containing a cylindrical measuring capacitor with plates, a supporting rod and a dielectric sleeve. A disadvantage of the known device is the insufficient accuracy due to the alignment errors of the cylindrical plates of the capacitor. The purpose of the invention is to improve the measurement accuracy by improving the centering of the cylindrical capacitor plates. The goal is achieved by the fact that the sensor is provided with a conical nut, which has a threaded connection with a supporting rod, a dielectric conical sleeve and a dielectric nozzle mounted slidably on the plate, which is made isolated, while the insulated plate has a conical surface, through which it interacts with a dielectric conical sleeve, supported by a conical nut, and the supporting rod is made with a conical surface in contact with the dielectric sleeve. The drawing shows the device, the overall appearance. The cylindrical plates 1 and 2 of the sensor measuring capacitor are located on the support rod 3. The cylindrical plate 2 is insulated. The cylindrical plates 1 and 2 are insulated through the dielectric sleeve 4 and the dielectric conical sleeve 5. The cylindrical ring 2 is fastened with a conical nut 6, which rotates along the thread onto the support rod 3. The conical nut b props the dielectric sleeve 5, which is included in a cone having a part of the cylindrical lining 2 on the face face. Due to the counter-action of the conical protrusion located on the supporting rod 3, the dielectric sleeve 4 somewhat expands when screwed to This means that the cylindrical lining 2 is centered and secured with respect to the supporting rod 3 and another cylindrical lining 1 having a sliding attachment on the supporting rod 3. The elements 1-6 of the structure form the capacitor unit of the sensor. The electrical circuit of the sensor, which converts the capacitance of the capacitor of the sensor and the electrical signal, is placed in the space between the lock nut and the limiting protrusion of the rod 8 The electrical circuit is installed when the rod 8 is unscrewed from the capacitor unit 1-6, on which electrical boards discs with a central hole. The electrical boards are attached with spacers to the limiting protrusion of the rod 8. The electrical signal from the sensor and the electrical supply cxewi are supplied through the bushing insulators and holes in the limiting ledge of the rod 8, the sliding sleeve 9 and the washer 10. The bushing and the corresponding insulators holes in the drawing are not shown. To avoid turning the straps 8 relative to the housing 12, the straps 8 have a keyway, which includes a key fixed on the sliding sleeve 9. The key and the night groove are not shown in the drawing. The moisture-proof electrical circuit of the sensor is provided with gland seals 11 and 12. Gland gasket 11 is pressed by washer 10. Gasket seal 12 is provided with sleeve 13, screwed into rod 3. Sensor damping, as well as additional alignment of cylindrical plates 1 and 2 contributes to dielectric head 14, which is located c on the end part of the cylindrical plate 2. To adjust it, we need} (the sensor spans performed during the installation and calibration process, the cylindrical cover 1 of the sensor capacitor has threads The connection to the nut 15 mounted on the housing 16. The adjustment is performed by rotating the flange protrusion of the plate 1 while unscrewing the counter nut 17. Flanges at the ends of the structure serve to attach the spacer devices for installation in the well or to attach extension rods. A central hole is used to mount a single sensor or a cord of such sensors. Formula of Longitudinal Displacement Sensor Including a Cylindrical Measuring Capacitor with a Plate , supporting rod and dielectric sleeve, characterized in that, in order to improve measurement accuracy by improving the centering of the capacitor plates, the sensor is equipped with a conical nut, which has a threaded connection with a supporting rod, a dielectric conical sleeve and a dielectric nozzle installed with the possibility of sliding on the plate which is insulated, and the i-insulated lining has a conical surface through which it interacts with a dielectric conical sleeve oh, podpiraemoy conical nut, and the supporting rod is made with a conical surface in contact with the dielectric sleeve. Sources of information taken into account in the examination 1. UK patent No. 1318344, cl. G 1 M, published 1969.

2. USSR author's certificate 320741, cl. G 01 M 27/00, 1970. 12 GZ P fS UGT f6 L .17