SU1267165A1

SU1267165A1 - Rig for testing flowmeters and liquid counters

Info

Publication number: SU1267165A1
Application number: SU843757626A
Authority: SU
Inventors: Владимир Андреевич Бушуев; Владимир Иванович Кучеренко; Евгений Михайлович Федяков
Original assignee: Предприятие П/Я А-7731
Priority date: 1984-07-02
Filing date: 1984-07-02
Publication date: 1986-10-30

Abstract

Изобретете относитс к измерительной технике и позвол ет повысить точность и надежность измерений во всем диапазоне поверочных расходов, Стенд содержит измерительную трубу 3 с подвод щими 7 и 8 и отвод щими 9 и 10 трубопроводами. Подаваема насосом 2 сидкость из резервуара 1 через коллектор 5 поступает через один из подвод щих трубопроводов 7 и 8 с размещенными в 1шх дросселем 6 и повер емым прибором 23 в измерительную трубу. Поршень 4, перемеща сь, перекрывает , соответственно, один из отвод щих трубопроводов 9, 10, вытесн жидкость через другой трубопровод , соответствующий дроссель 21 The invention relates to a measuring technique and allows to increase the accuracy and reliability of measurements in the whole range of calibration costs. The bench contains a measuring tube 3 with supply lines 7 and 8 and discharge lines 9 and 10. The drive from the reservoir 1 through the collector 5 is supplied by the pump 2 through one of the supply pipes 7 and 8 with the throttle 6 placed in 1 x and the rotary device 23 into the measuring tube. The piston 4, moving, closes, respectively, one of the discharge pipelines 9, 10, displaces the liquid through the other pipeline, the corresponding choke 21

Description

Изо&ретенне относигс к измерению расхода и количества жидкости и может найти применение при поверке расходомеров и счетчиков жидкости.Because of this, it is related to the measurement of flow and quantity of fluid and can be used when calibrating flow meters and fluid meters.

Целью изобретени вл етс повышение надежности и точности измерений во всем диапазоне поверочных расходов.The aim of the invention is to improve the reliability and accuracy of measurements over the entire range of calibration costs.

На фиг. 1 представлен стенд, у которого переменный дроссель размещен в одном подвод щем трубопроводе, а повер емый прибор размещен в другом подвод щем трубопроводе; на фиг. 2 - то же, переменный дроссель и повер емый прибор размещены в одном подвод щем трубопроводе.FIG. Figure 1 shows the stand, in which the variable choke is placed in one supply pipe, and the instrument being checked is placed in another supply line; in fig. 2 - the same; the variable choke and the calibrated instrument are placed in one supply pipe.

Представленные на фиг. 1 и 2 стенды содержат резервуар 1, насос 2, измерительную трубу 3 с поршнем 4, подвод щий коллектор 5, переменный дроссель 6, подвод щие трубопроводы 7 и 8, размещенные с возможностью перекрыти поршнем 4 в его крайних положени х отвод щие трубопроводы 9 и 10, сообщенные с резервуаром 1 через двухпозиционный распределитель 11 с запорными элементами 12 и 13 и с приводом 14, который содержит поршни 15 и 16 и упр авл ющие полости 17-20. В стенде, показанном на фиг. 1 управл ющие полости 17-20 выполнены проточными и вл ютс участками отвод щих трубопроводов 9 и 10 разделенными выполненными в поршн х 15 и 16 посто нными дроссел ми 21 и 22. В стенде, показанном на фиг. 2 управл ющие полости выполнены непроточными и сообщены с oтвoд щимIi трубопроводами 9 и 10 до и после размещенных в них посто нных дросселей 2 и 22. Стенды на фиг. 1 и 2 содержат повер емьш прибор 23, а также блок 2 автоматики и счетчик 25 импульсов. Измерительна труба 3 снабжена путевыми сигнализаторами 26 и 27. На (1)иг. 1 переменный дроссель 6 размещен в подвод щем трубопроводе 7, а повер емый прибор 23 размещен в подвод щем трубопроводе 8. На фиг. 2 переменный дроссель 6 и повер емый прибор 23 размещены в подвод щем трубопроводе 7.Presented in FIG. 1 and 2, the benches contain a tank 1, a pump 2, a measuring tube 3 with a piston 4, a supply manifold 5, a variable throttle 6, a supply pipe 7 and 8 placed with the possibility of the piston 4 blocking the discharge pipe 9 in its extreme positions and 10 communicated with reservoir 1 through an on-off valve 11 with shut-off elements 12 and 13 and with an actuator 14 which contains pistons 15 and 16 and control cavities 17-20. In the stand shown in FIG. 1, the control cavities 17-20 are made flow-through and are portions of the discharge pipes 9 and 10 separated by permanent throttles 21 and 22 in pistons 15 and 16. In the stand shown in FIG. 2, the control cavities are made non-flowing and communicated with conduit II by conduits 9 and 10 before and after the constant chokes 2 and 22 placed in them. The stands in FIG. 1 and 2 contain a turning device 23, as well as an automation unit 2 and a counter 25 pulses. The measuring tube 3 is equipped with track detectors 26 and 27. At (1) ig. 1, a variable choke 6 is placed in the supply line 7, and a rotatable device 23 is placed in the supply line 8. FIG. A 2 variable choke 6 and a rotatable device 23 are placed in the supply line 7.

Показанный на фиг. 1 стенд работает следующим образом.Shown in FIG. 1 stand works as follows.

Жидкость из резервуара 1 насосом 2 подают через коллектор 5 в измерительную трубу 3 и далее через двухпозиционный распределитель 11 направл ют в резервуар 1. Если запорный элемент 13 распределител 11 перекрывает .проходное сечение со стороны отвод щего трубопровода 10, тоThe liquid from tank 1 is pumped through the collector 5 into the measuring tube 3 and then through the on-off valve 11 to the tank 1. If the shut-off element 13 of the distributor 11 closes the flow section on the side of the discharge pipe 10,

часть жидкости, подаваемой через коллектор 5, проходит по подвод щему трубопроводу 8 через повер емый прибор 23 и перемещает поршень 4 влево , в то врем как вытесн ема поршнем 4 из трубы 3 жидкость, а также часть жидкости, подаваема по подво- д щему трубопроводу 7, проход т по отвод щему трубопроводу 8 через дроссели 21. Развиваемое приводом 11 уси5 лие, равное разности усилий от перепада давлений на дроссел х 21 и от перепада давлений на запорном элементе 1.3, удерживает запорные э.ементы 12 и I3 и поршни 15 и 16 вpart of the fluid supplied through the manifold 5 passes through the supply pipe 8 through the rotating device 23 and moves the piston 4 to the left, while the liquid displaced by the piston 4 from the pipe 3, as well as part of the liquid supplied through the supply pipeline 7, passes through the discharge pipe 8 through the throttles 21. The drive developed by the actuator 11, equal to the difference of the forces from the pressure drop to the throttles x 21 and from the pressure drop on the locking element 1.3, keeps the locking arms 12 and I3 and the pistons 15 and 16 in

0 крайнем правом положении. Когда поршень 4 начинает перекрывать проходное сечение отвод щего трубопровода 9, давление в измерительной трубе 3 повышаетс и отжимает запорный0 extreme right position. When the piston 4 begins to block the flow area of the discharge pipe 9, the pressure in the measuring tube 3 rises and depresses the stop

5 элемент 13, обеспечива подвод }кидкости к дроссел м 22. Перепад давлений на дроссел х 22 перебрасывает запорные элементы 12 и 13 и поршни 15 и 16 в крайнее левое положение.5 element 13, providing a supply of liquidity to the throttle of m 22. The pressure drop across the throttle x 22 moves the locking elements 12 and 13 and the pistons 15 and 16 to the extreme left position.

0 Привод 14 фиксирует подвижные детали в этом положении усилием, равным разности усилий от перепада давлений на дроссел х 22 и от перепада давлений на запорном элементе 12. Поршень 4 перемещаетс вправо потоком жидкости, поступающей по трубопроводу 8. Жидкость, подаваема по трубопроводу 7, и жидкость, вытесн ема из измерительной трубы 3 через отвод щий трубопровод 9 и распределитель 11, поступает в резервуар . Когда поршень 4 начнет перекрывать проходное сечение отвод щего трубопровода 10, запорные элементы 12 и 13 и поршни 15 и 16 будут переброшены в крайнее правое положение и цикл работы стенда повторитс .,0 The actuator 14 fixes the moving parts in this position by an effort equal to the difference in the forces from the pressure drop on the throttles x 22 and from the pressure drops on the locking element 12. The piston 4 moves to the right by the flow of fluid supplied through the pipeline 8. The fluid supplied by the pipeline 7, and the fluid displaced from the measuring tube 3 through the discharge pipe 9 and the distributor 11 enters the reservoir. When the piston 4 begins to shut off the flow area of the discharge pipe 10, the locking elements 12 and 13 and the pistons 15 and 16 will be transferred to the extreme right position and the cycle of the stand will repeat.

Операци поверки прибора 23 заключаетс в определении количества импульсов прибора 23 за врем прохож0 дени поршнем 4 длины измерительного участка между путевыми сигнализаторами 26 и 27 при движении поршн 4 влево. Включение и выключение счетчика 25 импульсов производитс бло5 ком 24 автоматики по сигналам от путевых сигнализаторов 26 и 27.The operation of calibration of the device 23 consists in determining the number of pulses of the device 23 during the passage time of the piston 4 of the length of the measuring section between the track detectors 26 and 27 when the piston 4 moves to the left. Switching on and off the counter 25 pulses is performed by the automatics block 24 according to the signals from the travel detectors 26 and 27.

Claims

The operation of the tested device 23 at the flow rate corresponding to the 1 st range of the operating range of the flow is provided with a small hydraulic resistance of variable throttle 6. The increase in the flow rate through the scanned device 23 to the top of the working range of flow is achieved by increasing the hydraulic resistance of the drossel 6, while the flow The flow through conduit 7 is reduced. At each setting, the throttles 6 are supplied to the measuring tube 3 through pipelines and 8, the flow rates are constant, as the pressures at the inlet and outlet of the stand piping system remain unchanged. The total flow from the pump 2 and discharged through the distributor I1 will remain virtually incalculable at any setting of the throttles 6, since the piping system 7 and 8 is a small part of the hydraulic, stand pipelines and a slight change in the total hydraulic characteristic of the piping system and 8 s The throttle 6 and the device 23 do not affect the overall hydraulic characteristic of the main lines of the stand, the stand shown in FIG. 2 works as follows. Fluid from reservoir 1 is pumped through pump manifold 5 to measuring tube 3 and then through two-position valve 11 to reservoir 1. If stop elements 12 and 13 of distributor II and pistons 15 and 16 of actuator 14 are in the leftmost position, piston 4 moves to the right part of the total flow passing through the supply line 7 through the variable choke 6 and the device being turned 23. The piston 4 is displaced from the pipe 3, the liquid, and also part of the liquid entering the pipe 3 through the supply line 8, passes through the outlet another in line 10 through a throttle 22. The actuator 14 develops usipie equal to the difference of pressure differential forces on the throttle 22 and the differential pressure across the closure member 12, uder mvaet locking elements 12 and 13 and the pistons 15 and 16 in the leftmost position. When the piston 4 begins to block the flow area of the discharge pipe 10, the locking elements 1; 1 12 and 13 and the pistons 15 and 16 are re-1654 to the far right position. The piston 4 begins to move to the left by the flow of liquid supplied through the supply line 8, while the liquid displaced from the pipe 3 and the liquid supplied through the supply line 7 flows through the discharge pipe 9 and the distributor 11 into the reservoir 1. When the piston 4 starts overlap the flow area of the outlet pipe 9, shut up (elements 12 and 13 and pistons 15 and 16 will be transferred to the extreme left position and the stand cycle is more rapid. The calibration of device 23 consists in determining the number of pulses and during the passage of the piston A, the length of the measuring section between the traveling annunciators 26 and 27 when the piston 4 moves to the right. The impulse counter 25 is turned on and off by the automation unit 24 according to the signals from the traveling detectors 26 and 27. to the limit of the operating flow range, provided with a small hydraulic resistance of the throttle 6. The reduction of the flow through the device 23 to the lower aisle of the working flow range is achieved by increasing the hydraulic deceleration 6. The fluid flow rate through the pipeline 8 increases. At each constant setting of temporary throttles 6, the flows to the measuring tube 3 via pipelines 7 and B are constant, as the pressures at the inlet and outlet of the stand pipeline system remain unchanged. The total flow rate supplied by the pump 2 and discharged through the distributor 11 will remain almost unchanged, since insignificant changes in the total hydraulic characteristic of the pipeline with throttle 6 and the device 23 and pipeline 8 have almost no effect on the overall hydraulic performance of the bench lines. Invention Stand for calibration of flow meters and liquid meters containing a reservoir, a pump, a measuring piston with 5 pistons, a supply manifold, a section for mounting a rotatable instrument, two supply lines, two discharge lines arranged to be blocked by a piston in extreme positions and communicated with the reservoir through a two-blade distributor with a drive, the control cavities of which are communicated with from 656 water pipelines, characterized in that, in order to increase reliability and accuracy and measurements over the entire range of verification expenses in one of the supply pipes situated boiling variable throttle and the other supply conduit present - portion for mounting power metal emogo device.

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