CS215763B1 - Re-load device - Google Patents
Re-load device Download PDFInfo
- Publication number
- CS215763B1 CS215763B1 CS803280A CS803280A CS215763B1 CS 215763 B1 CS215763 B1 CS 215763B1 CS 803280 A CS803280 A CS 803280A CS 803280 A CS803280 A CS 803280A CS 215763 B1 CS215763 B1 CS 215763B1
- Authority
- CS
- Czechoslovakia
- Prior art keywords
- hydraulic motor
- force
- minimum
- maximum
- limiter
- Prior art date
Links
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
Zariadenie mé uplatnenie hlavně v oblasti stavebnictví!, pri skúškách vlastností zemin, asfaltobetónov a iných materiálov. Vynálezom sa rieši problém stabilizácie parametrov opakovanéj zéťaže, a to jej minimálnej a maximálněj hodnoty.Na stabilizéciu sa používajú obmedzovače síly, opatřené pružinami, stlačenými na hodnoty minimálnej a maximálněj síly. Vynález sa može uplatnit všade tam, kde je potřebné zistiť vlastnosti vzoriek materiálu pri opakovanom zatažovéní, napr. vzoriek dřeva, gumy, plastických a iných látok.The device is mainly used in the field of construction!, in testing the properties of soils, asphalt concretes and other materials. The invention solves the problem of stabilizing the parameters of repeated loading, namely its minimum and maximum values. Force limiters are used for stabilization, equipped with springs compressed to the values of minimum and maximum force. The invention can be used wherever it is necessary to determine the properties of material samples under repeated loading, e.g. samples of wood, rubber, plastic and other substances.
Description
Vynález sa dotýká zariadenia na opakované zatažovanie hlavně vzoriek stavebných materiálov, u ktorého sa rieší problém stabilizácie hodnot zaťažovacej síly.The invention relates to a device for repeatedly loading mainly samples of building materials, in which the problem of stabilizing the load force values is solved.
V známých zatažovacích zariadeniach sa často využívá hydrodynamický pulzátor, ktorý v spojení s priamočiarým hydromotorom umožňuje vytvárat prakticky lubovolný priebeh zatažovacej sily od minimálněj po maximělnu hodnotu, Zaťažovacia sila vzniká ako reakcia vzorky materiálu na pretvéranie posunom tahadla hydromotora. Doterajší sposob jej stabilizácie je taký, že minimélné hodnota sily sa udržuje tiažou zévažia, ku ktorej sa přidává sila pulzátora, alebo sa tiažou závažia ovládá pomocou tahadla skrutka, ktorá sa zakrúca a vytvára zatažovaciu silu, úmernú posobiacemu tahu. Předpokládá sa přitom, že maximálna hodnota sily ostane pri stabilizovanéj minimálnej hodnotě konstantně.In the known load devices, a hydrodynamic pulsator is often used, which, in conjunction with a linear hydraulic motor, makes it possible to generate virtually any load force course from a minimum to a maximum value. The current stabilization method is such that the minimum force is maintained by the weight of the weight, to which the pulsator force is added, or by the weight of the weight is controlled by a bolt that twists and produces a retracting force proportional to the thrust. It is assumed that the maximum force value remains constant at the stabilized minimum value.
Změnou vlastností zatažovaného materiálu sa však táto maximálna hodnota mění, čo u zariadení stabilizovaných závažím sa nezahladňuje. Ďalšou nevýhodou týchto zariadení je, že ich hmotnost je zbatečne velká, čo je sposobené poměrně velkou hmotnosťou použitých závaží.However, by varying the properties of the loaded material, this maximum value changes, which is not taken into account for devices stabilized by the weight. A further disadvantage of these devices is that their weight is drastically large, which is due to the relatively large weight of the weights used.
Uvedené nedostatky nemá zariadenie na opakované zatažovanie podlá vynálezu, u ktorého maximálna a minimelna hodnota zaťažovacej sily, vytvéranej hydromotorom, sa udržuje obmed-’ zovačmi, opatřenými pružinami, stlačenými na hodnoty minimálnej a maximálněj sily, ktorá sa na ne prenéša pomocou tahadiel. Vysunutie tahadla obmedzovača minimálnej sily sa zistuje prevodníkom polohy tahadla, ktorý svójim výstupným signálom ovládá čerpadlo, ktorá dodává tlaková kvapalinu, napr. vodu do tlakovej komory hydromotora, čím sa tahadlo hydromotora vysunuje a tým posobi proti vysunovanou tahadla pbmedzovača. Takouto reguláciou polohy £a•hadla sa dosiahne, že jeho dovolené vysunutieneprekročí nastavenu hodnotu a pretvorenie vzorky v smere osi opakovanej zátaže sa sleduje pomocou tahadla hydromotora.These drawbacks do not have a retractable device according to the invention, in which the maximum and minimum value of the load force generated by the hydraulic motor is maintained by limiters provided with springs compressed to the values of minimum and maximum force which is transmitted to them by means of drawbars. The pull-out of the minimum force limiter is detected by the pull-position transducer which, with the exception of the output signal, controls the pump which supplies the pressurized fluid, e.g. water into the pressure chamber of the hydraulic motor, thereby extending the rod of the hydraulic motor and thereby moving against the extended rods of the limiter. By such a control of the position £ and sa of the hose it is achieved that its allowable extension does not exceed the set value and the deformation of the sample in the direction of the axis of repeated load is monitored by means of the hydraulic motor puller.
Podstata zariadenia podlá vynélezu je v tom, že hydromotor, obmedzovač minimálnej sily > opatřený dalšou pružinou sú v lubovolnom poradí umiestené v oši zátaže, totožnej s osami íahadiel, pričom na tahadlo hydromotora je připojený převodník polohy tahadla, na ktorý je napojeno čerpadlo, spojené s tlakovou komorou hydromotora.The essence of the device according to the invention is that the hydraulic motor, the minimum force limiter ' provided with another spring, is placed in any order in the load eye, identical to the axes of the cranks, and a hydraulic position transducer connected to the pump connected to the pump the pressure chamber of the hydraulic motor.
Použitím pružin sa získá kompaktně zariadenie, u ktorého odpadá manipulácia so zévažiami a hmotnost zariadenia sa podstatné sníží. Stabilizáciou maximálněj hodnoty zatažovacej sily s,a rešpektujú fyzikálně vlastnosti vzorky stavebného materiálu.By using springs, a device is obtained which is free of handling of the weights and the weight of the device is substantially reduced. By stabilizing the maximum load force s, and they physically respect the properties of the building material sample.
Zariadenie podlá vynélezu je znázorněné na priloženom výkrese. Jednotlivé prvky zariadenia sú označené blokmi, ktořé sú připadne doplněné schémou funkcie. Vzorka materiálu 2. umístěné na podstave, potom hydromotor 3 a ňalej dva obmedzovače 6,^ sú usporiadané nad sebou v jednej osi, ktorá je osou zátaže.The device according to the invention is shown in the attached drawing. Individual elements of the device are marked by blocks, which are possibly supplemented by a function diagram. A sample of material 2 positioned on the base, then the hydraulic motor 3 and the two restrictors 6, 6 are arranged one above the other in a single axis which is the axis of the load.
Hydrodynamický pulzátor 1 vytvára pulzy prietoku kvapaliny, ktoré sa privádzaju do tlakovej komory 2 hydromotora _3, posobiaceho pomocou ťahadla 4 na vzorku materiálu £. Hydromotor 2 je spojený s obmedzovačom 6 minimálnej hodnoty sily optreným pružinou ktorého tahadlo 8 sa pri poklese sily pod nastavenú hodnotu vysunuje. Obmedzovač 6 minimálnej hodnoty sily je dalej spojený s obmedzovačom^ maximálnej hodnoty sily , opatřeným pružinou 10, ktorého tahadlo 11 sa pri překročení nastavenej hodnoty sily zasunuje. Vysunutie tahadla 8 obmedzovača 6 minimálnej hodnoty sily sa prevádza prevodníkom 12 na veličinu, vhodnú na ovládanie čerpadla 13. ktorým sa doplňuje voda do tlakovéj komory 2, čo posobí proti vysunovaniu tahadla 8.The hydrodynamic pulsator 1 generates pulses of fluid flow which are fed to the pressure chamber 2 of the hydraulic motor 3, which is pushed by means of a handle 4 on the sample material 6. The hydraulic motor 2 is connected to a minimum force limiter 6 by means of a spring-loaded spring whose rod 8 extends when the force drops below the set value. The minimum force limiter 6 is further coupled to a maximum force limiter 6 provided with a spring 10, whose rod 11 is retracted when the set force value is exceeded. The pull-out 8 of the minimum force limiter 6 is converted by a transducer 12 into a quantity suitable for actuating the pump 13 by which water is added to the pressure chamber 2, thus preventing the pull-out 8 from extending.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS803280A CS215763B1 (en) | 1980-11-24 | 1980-11-24 | Re-load device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS803280A CS215763B1 (en) | 1980-11-24 | 1980-11-24 | Re-load device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CS215763B1 true CS215763B1 (en) | 1982-09-15 |
Family
ID=5430370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CS803280A CS215763B1 (en) | 1980-11-24 | 1980-11-24 | Re-load device |
Country Status (1)
| Country | Link |
|---|---|
| CS (1) | CS215763B1 (en) |
-
1980
- 1980-11-24 CS CS803280A patent/CS215763B1/en unknown
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE68912806T2 (en) | Test system for caissons and driven piles. | |
| US3721095A (en) | Controllable force method and system of driving piles | |
| Marsh et al. | The effect of strain rate on the post-yield flow of mild steel | |
| DE19651362C1 (en) | Device for monitoring a predetermined level in a container | |
| Simcock et al. | Cyclic triaxial tests with continuous measurement of dissipated energy | |
| ES424907A1 (en) | Ram tensioning device | |
| DE1484428A1 (en) | Method and device for moving a pole or the like. through soil | |
| US3468222A (en) | Control for a ramming hammer with hydraulic drive | |
| DE69217050T2 (en) | WINCH FOR TOWING UNDERWATER OBJECTS | |
| CS215763B1 (en) | Re-load device | |
| GB1573885A (en) | Arrangement for active compensation of unwanted relative movements preferably during disposition of load (cargo) | |
| Leeson et al. | The variation of soil critical state parameters with water content and its relevance to the compaction of two agricultural soils | |
| US3180129A (en) | Top-pressure forging hammer | |
| Dexter et al. | Soil mechanics in relation to tillage, implements, and root penetration in lowland soils | |
| SU1448239A1 (en) | Installation for testing specimens in flat-strained state | |
| WO1984002977A1 (en) | Hydraulic pressure sensor | |
| AT391505B (en) | METHOD AND DEVICE FOR CHECKING Piles PRODUCED AT THE SITE | |
| Broms | Discussion of “Piles in Cohesionless Soil Subject to Oblique Pull” | |
| FR2523918B1 (en) | ||
| NL8402313A (en) | METHOD AND APPARATUS FOR TESTING A BRAKE PREPARATION DEVICE OF A FIREPLACE | |
| GB2133888A (en) | Elastic limit detection in tensile strength testing systems | |
| Yamamuro et al. | B-value measurements for granular materials at high confining pressures | |
| SU1051409A1 (en) | Installation for dynamic test of material when three-axial compressing | |
| SU894567A1 (en) | Penetrometer for soils | |
| SU850798A1 (en) | Device for measuring the mechanical properties of soil |