CS226902B1

CS226902B1 - Device for discontinuous level measurement of bulk solids with remote pneumatic control

Info

Publication number: CS226902B1
Application number: CS147181A
Authority: CS
Inventors: Tibor Sokol
Original assignee: Tibor Sokol
Priority date: 1981-03-02
Filing date: 1981-03-02
Publication date: 1984-04-16

Abstract

Vynález sa týká zariadenia na diskontinuálne meranie úrovně hladiny sypkých hmot s diaikovým pneumatickým ovládáním na báze nízkotlakového systému 140 kPa.The invention relates to a device for discontinuous level measurement of bulk materials with diaic pneumatic control based on a low-pressure system of 140 kPa.

Description

Vynález sa týká zariadenia na diskontinuálne meranie úrovně hladiny sypkých hmot s diaikovým pneumatickým ovládáním na báze nízkotlakového systému 140 kPa.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for the discontinuous measurement of the level of bulk materials with a remote pneumatic control based on a low pressure system of 140 kPa.

Pri bilancovaní vyrobeného alebo spotřebovaného množstva sypkých hmot najma v chemickom priemysle třeba v určitých intervaloch merať úroveň hladiny v zásobníkoch. Prevádza sa to zváčša ručně, viacerými sposobmi tak, že pracovník musí po každý raz otvárať zásobník, ktorý po zistení úrovne hladiny třeba opať uzavrieť, čo^! je pracné a ak berieme do úvahy zásobníky 10, alebo i vac metrov vysoké, aj nepohodlné.When balancing the amount of bulk material produced or consumed, especially in the chemical industry, the level of the storage tanks should be measured at certain intervals. This is usually done manually, in a number of ways, so that the worker has to open the container every time, which must be closed again after the level has been detected, what ^! it is laborious and uncomfortable if we consider containers 10 or even meters high.

Niektoré druhy zariadení pracujú s diaikovým ovládáním i s výstupným signálem nameraných hodnot.Some types of devices work with the remote control and the output signal of the measured values.

Ich nedostatkom je nutnosť použitia elektrickej energie. Je to najmá elektrický pohon, ktorý v každom případe představuje potenciálně nebezpečie požiaru alebo výbuchu.Their drawback is the need to use electricity. It is the only electric drive that in any case poses a potential fire or explosion hazard.

Ďalej je to zložitý a chúlostivý elektromechanizmus, ktorý ťažšie odolává tvrdým pracovným podmienkam hlavně v priestoroch posobenia agresívnych plynov; pár alebo prachu. Presnosť, ktorú udávajú výrobcovia ± 10 cm pri rozsahu 40 m nemusí byť vždy, hlavně na presnejšie určovanie obsahu plytšieho zásobníka, dostačujúce.In addition, it is a complex and delicate electromechanism that is more difficult to withstand harsh working conditions, especially in aggressive gas deposition areas; steam or dust. The accuracy given by the manufacturers ± 10 cm over a range of 40 m may not always be sufficient, mainly to more accurately determine the contents of a shallower container.

Vyššie uvedené nedostatky odstraňuje zariadenie podlá vynálezu na diskontinuálne meranie úrovně hladiny sypkých hmót s diaikovým pneumatickým ovládáním a prenosom výstupného signálu nameraných údajov, pozostávajúce z meracieho mechanizmu, ktorého podstatou je, že merací kotúč je súose spojený s excentrickou vačkou, cez převod otáčok s oběžným kolom pneumatického motora a mechanickým regulátorom otáčok, pričom je blokovacia brzda oběžného kola v pneumatickom spojení s výkyvnou brzdnou pákou napnutím lanka a dyšňa vychylovacej páky je kyvné vychylovaná bežcom upraveným na lanku.The above-mentioned drawbacks are eliminated by the device according to the invention for the discontinuous measurement of the level of bulk solids with a remote pneumatic control and transmission of the output signal of the measured data, consisting of a measuring mechanism whose essence is that the measuring disc is coaxially connected to the cam a pneumatic motor and a mechanical speed regulator, wherein the impeller lock brake is in pneumatic connection to the pivoting brake lever by tensioning the cable, and the biasing lever bend is swiveled by the slider provided on the cable.

Výhodou zariadenia na meranie úrovně hladiny sypkých hmót podlá tohto vynálezu je, že sa dosahuje vyššieho technického účinku jednak možnosťou jeho použitia aj v priestoroch, kde je nebezpečie požiaru alebo výbuchu, v priestoroch prašných, agresívnych i horúcich a tiež v zvýšenej přesnosti merania.An advantage of the bulk level meter according to the present invention is that it achieves a higher technical effect both by the possibility of its use also in areas where there is a risk of fire or explosion, in dusty, aggressive and hot areas, and also in increased measurement accuracy.

Meracie zariadenie pracuje iskrovobezpečne, na dialkový pokyn, výlučné pomocou energie tlaku vzduchu 140 kPa a snímané hodnoty údajov úrovně hladiny prevádza na pneumatický signál 20 až 100 kPa, ktorý prenáša do priestoru ovládania a prevádza ho' na číselné hodnoty vyjadrujúce dížku ‘ vzdialenosti spúšťanej meracej sondy z úrovne pevného bodu nad maximálně možnou úrovňou na momentálnu úroveň hladiny.The measuring device operates intrinsically, at a remote command, exclusively using air pressure energy of 140 kPa and converts the sensed level data to a pneumatic signal of 20 to 100 kPa, which transmits to the control area and converts it into numerical values representing the length of the triggering distance. from a fixed point level above the maximum possible level to the current level.

Zariadenie podlá vynálezu pracuje s presnosťou ± 1 cm na 15 m.The device according to the invention operates with an accuracy of ± 1 cm per 15 m.

Na diatkové ovládanie úkonov a prenášanie signálov sú použité prepínacie ventily a kontrolně manometre, čo je spolu s indikačným sumátorom zabudované vo vzdialenom ovládacom paneli, ktorý je umiestnený v priestore najvýhodnejšom pre obsluhu. Meracie zariadenie je s ovládacím panelom přepojené polyetylénovými hadicami a napájené energiou tlaku vzduchu nízkotlakového pneumatického systému 140 kPa.Switching valves and pressure gauges are used for remote operation and signal transmission, which, together with the indicator summator, is built into the remote control panel, which is located in the most convenient area for the operator. The measuring device is connected to the control panel with polyethylene hoses and supplied with air pressure energy of low pressure pneumatic system 140 kPa.

Zariadenie podlá vynálezu je znázorněné na priloženom obrázku:The device according to the invention is shown in the attached figure:

Po obvode meracieho kotúca 1, najma dlžky obvodu 100 cm je ovinuté lanko 2, na ktorého volnoím konci je upevněná meracia sonda 3 plošného tvaru. Merací kotúč 1 je v súosom spojení s excentrickou vačkou 5 a cez převod 6 otáčok s oběžným kolom 4 pneumatického motora a s regulátorom 7 otáčok.A cord 2 is wound around the circumference of the measuring disk 1, in particular of a circumference of 100 cm, at the free end of which a flat probe measuring probe 3 is fixed. The measuring disk 1 is in coaxial connection with the eccentric cam 5 and via a 6-speed transmission to the impeller 4 of the pneumatic motor and to the speed controller 7.

Brzdná páka 8, ktorá je kyvné uložená v dosahu napnutého lanka 2, pomocou běžného pneumatického ovládacieho servopohonu, udržuje blokovacou brzdou 11 merací kotúč 1 v kl'ude, pričom dyšňa vychylovacej páky 9 je od oběžného kola 4 pneumatického motora odchýlená pomocou bežca 19, ktorý sa v základnej kludovej polohe nachádza v maximáinej výške, čím je súčasne pomocou pohyblivej upehávky 13 uzavreté hrdlo 14, spojujúce priestor skrinky meracieho· mechanizmu s meraným priestorom, kedy uhol natočenia meracieho kotúča 1, ako aj excentrickej vačky 5 je v základnej polohe a výstupný signál sa rovná 20 kPa, čo představuje nulovú hodnotu meraného údaja.The brake lever 8, which is pivotally mounted within the reach of the tensioned cable 2, by means of a conventional pneumatic actuator, keeps the measuring disc 1 at rest with the blocking brake 11, the bias lever 9 being deflected from the impeller 4 of the pneumatic motor. is located in the basic idle position at the maximum height, whereby the throat 14, which connects the housing of the measuring mechanism with the measured space, is closed by means of the movable tread 13, the angle of rotation of the measuring disc 1 and eccentric cam 5 is in the basic position and output signal equals 20 kPa, which is zero for the measured value.

Na vzdialený pokyn pomocou energie tlaku vzduchu sa uvolní blokovacia brzda 11, čím vlastnou váhou meracej sondy 3 táto začne klesat a táháním lanka 2 uvedie merací kotúč 1 do otáčivého pohybu, ktorého rovnoměrnost zaisťuje regulátor 7 otáčok, pričom: sa mění aj poloměr excentrickej vačky 5 a pomocou běžného pneumatického proporcionálneho· vysielacieho člena a zosilovača prevádza uhol pootočenia v rozsahu 0 až 360° na tlakový signál 20 až 100 kPa, opakujúci sa každou otáčkou, ktorý sa ďalej prenáša do vzdialeného velína a pomocou pneumatického indikačného sumátora 12 tento prevádza na číselný alebo analogový údaj.Upon a remote command by means of the air pressure energy, the locking brake 11 is released, whereby the weight of the measuring probe 3 begins to drop and pulls the cable 2 to move the measuring disc 1 in a rotational movement whose uniformity is ensured by the speed regulator 7. and by means of a conventional pneumatic proportional transmitter and amplifier converts a rotation angle of 0 to 360 ° to a pressure signal of 20 to 100 kPa, repeating each revolution, which is further transmitted to a remote control room, and converted to a numerical or analog data.

Při dotyku meracej sondy 3 s hladinou sa uvolněním dovtedy ňou napnutého lanka 2 vlastnou váhou brzdnej páky 8 změní uhol jej odchýlenia, tým pomocou jednoduchého pneumatického proporcionálneho člena a zosilovača náhle poklesne příslušný signál tlaku vzduchu, čím sa pomocou blokovacej brzdy 11 okamžité zabrzdia dalšie otáčky.When the measuring probe 3 touches the surface, the deflection angle of the brake lever 8 is changed by the weight of the brake lever 8 by its own weight, thereby suddenly decreasing the corresponding air pressure signal by means of a simple pneumatic proportional member and amplifier.

Po odčítaní údaja sa pneumatickým signálom pomocou pneumatického servopohonu změní uhol brzdnej páky 8, čím sa umele opat vytvoří situácia váhou visiacej sondy 3 napnutého^ lanka 2, č.o umožní okamžité uvolnenie blokovacej brzdy 11 a pomocou prúdu tlaku vzduchu vychádzajúceho z dyšne vychylovacej páky 9, smerujúceho tangenciálně na oběžné kolo 4 pneumatického motora sa toto uvedie do· pohybu a cez převod 6 otáčok spatným otáčaním meracieho kotúča 1 sa lanko 2 meracej sondy !3. začne naň opat navíjať, čo trvá dotial, pokým sa bežec 10 nevrátí do svojej základnej kludovej polohy, kedy odchýlí dyšňu vychylovacej páky 9 a uzavrie přívod energie tlaku vzduchu, čím opat zabrzdí blokovacou brzdou 11 ďalší otáčivý pohyb meracieho kotúča 1, ako i excentrickej vačky 5 a zastaví sa v základnej polohe připravený na ďalšiu možnost merania.After reading the data, the angle of the brake lever 8 is changed by a pneumatic signal by means of a pneumatic actuator, thereby artificially creating the situation by weighing the hanging probe 3 of the tensioned cable 2, allowing immediate release of the locking brake 11 and airflow coming from the bouncing lever 9. , directed tangentially to the impeller 4 of the pneumatic motor, this is set in motion and by means of a 6-speed gearing by reverse rotation of the measuring disc 1, the cable 2 of the measuring probe 13 is moved. begins to wind the abbot there, until the slider 10 returns to its home position, deflecting the bend of the deflecting lever 9 and shutting off the air pressure power supply, thereby braking the blocking brake 11 with further rotational movement of the measuring disc 1 and the eccentric cam 5 and stops in the home position ready for the next measurement option.

Claims

A pneumatic signal of 20 to 100 kPa, which is transmitted to the control area and converted to numerical values expressing the distance ‘of the distance of the triggered probe from the fixed point above the maximum possible level to the current level. The apparatus according to the invention operates at an accuracy of ± 1 cm to 15 m. Switching valves and pressure gauges are used for remote control of the signals and signal transmissions, which, together with the indicator summator, is incorporated in the remote control panel, which is located in the most advantageous space operator. The metering device is connected to the control panel by polyethylene hoses and soldered by the air pressure energy of a low pressure pneumatic system of 140 kPa. The device according to the invention is shown in the attached figure: A cable 2 is wound around the circumference of the measuring disc 1, in particular the circumference of the 100 cm circumference, of which the flat shape measuring tape 3 is fastened. The measuring disc 1 is coaxial to the eccentric cam 5a via a 6-speed transmission with a 4-pneumatic motor impeller and a 7-turn controller. The braking lever 8, which is pivotally mounted within the tensioned cable 2, by means of a conventional pneumatic actuator, keeps the measuring disc 1 in the ball by means of a locking brake 11, the nozzle lever 9 being from the impeller 4 of the pneumatic motor deflected by the slider 19, which in the basic rest position is at a maximum height, thereby closing the neck 14 connecting the space of the measuring mechanism housing with the measured space, when the angle of rotation of the measuring disc 1, as well as the eccentric cam 5 is at the base position and the output signal is equal to 20 kPa, which represents a zero value of the measured value. At a remote command, by means of the air pressure energy, the locking brake 11 is released, whereby the measuring probe 3 is gravitationally lowered by the weight of the measuring probe 3 and the measuring disk 1 is brought into rotation by the pulling of the cable 2, which is provided by the speed controller 7, where: cams 5 and with a conventional pneumatic-proportional transmitting member and amplifier, converts an angle of rotation between 0 and 360 ° to a pressure signal of 20 to 100 kPa, repeating each revolution, which continues to be transmitted to the remote control room and by means of a pneumatic indicator sum. -ra 12 this converts to numeric or analogue data. When the measuring probe 3 touches the surface by loosening the previously tensioned cable 2 by the actual weight of the brake lever 8, the respective air pressure signal is suddenly dropped by a single pneumatic proportional member and a silo, thereby further braking the next speed by means of the blocking brake 11. After reading the reading, the angle of the brake lever 8 is changed by a pneumatic servo actuator to allow the abutment to create a situation by the weight of the suspended probe 3 of the tensioned cable 2, allowing the locking brake 11 to be released immediately and As a result of the air pressure flow of the outgoing deflecting lever 9, which is directed toward the pneumatic motor impeller 4, this is brought into motion and the speed 6 of the measuring probe 3 is rotated by rotating the metering disc 1 with a rotational speed. the abutment 10 begins to rewind thereafter, until the runner 10 returns to its basic rest position, when it deflects the tip of the deflection lever 9 and closes the air intake pressure supply, thereby blocking further rotational movement of the measuring disc 1 by the blocking brake 11 as the eccentric cam 5, and the next measurement option is prepared in the basic position. OBJECT The device for the discontinuous measurement of the level of loose materials with the dial-pneumatic control and transmission of the output signal of the measured data, consisting of a measuring mechanism, which includes a measuring probe mounted on the control wheel, controlling the speed of the measuring disc, pneumatic proportional transmitters and amplifiers on remote transmission of the output signal of the changes in the radius of the radius cam, corresponding to the change in the rotation of the measuring disc and the tire of the mating servo of the brake and return mechanism, characterized in that the metering disc (1) is coaxially connected to the eccentric cam ( 5), via a gear (6 turns of the running wheel (4) of the pneumatic motor and a mechanical speed controller (7), wherein the locking brake (11) of the race wheel (4) is in pneumatic connection with the swinging brake lever (8) by tensioning the cable (2) and the lever of the deflection lever (9) is swinging by the runner (10) upra on the wire (2), 1 sheet of drawings