FOELDES LASZLO (HU)
NAGY OTTO TIBOR (HU)
| SU857577A1 | 1981-08-23 |
| 1. | Energy storing stand for the displacement of equipments, consisting of an equalizing cylinder and a control cylinder, as well as of the loadcarrying plate having been arranged on the piston rod of the equalizing cylinder, c h a r a c t e r i z e d in that the space (20) below the piston (3) °f t^e equalizing cylinder (2) is connected to the levelling tank (2l) via the duct (22) and the wayvalve (iδ) opening and closing the duct (22), while the space (15) under the control piston (5) of the control cylinder (6) and the space (9) above the control piston (5) are connected to the control input of the way valve (18) via a checkvalve (ll, 17) each. |
| 2. | Stand as claimed in claim 1, c h a r a c t e i z e d in that the equalizing cylinder (2) and the contro valve (6) are coaxially arranged and the piston rod (4) of the piston (3) of the equalizing cylinder (2) is formed as a pipe with an inner surface being suitable for guiding the control piston (5) of the control cylinder (6). |
| 3. | Stand as claimed in claim 3 Q:c k, c h a r a c i z e d in that the piston rod (7) of the control piston (5) is formed as a doublewalled pipe and the channel (δ) therein interconnects the space (9) above the control piston (5) and one of the check alves (ll) via the channel (lθ), which again communicates with the opposite end of the piston (7)« . |
| 4. | Stand as claimed in any of the claims 1 to 5. c h a r a c t e r i z e d in that the space (15) under the control piston (5) is connected to the other check val (24) through the orfice(s) (13, ik) and the channel (l6). |
| 5. | 7« Stand as claimed in claim 6, c h a r a c t e r¬ i z e d in that the upper orfice (13) connects the pipe (l2) enclosing coaxially the inner channel (8) in the piston rod (7) with the space (15) below the control piston (5), while the lower orfice (l4) arranged under the lower lid of the equalizing cylinder (2) connects the pipe (12) with the other checkvalve (17) "vi the channel (l6). |
| 6. | Stand as claimed in claims 1 to 7, c h a r a c t e r i z e d in that the way valve (l8) is a remotely controllable shut off valve. |
| 7. | Stand as claimed in any of the claims 1 to 8, c h a r a c t e r i z e d in that between the common point of the channel (10) and the check valve (ll) and the at mosphere a throttle check alve (23) is inserted, while between the common point of the channel (l6), the check valve (17) and the atmosphere another throttle check valve (2k) is to be found. |
| 8. | Stand as claimed in any of the claims 1 to 9> c h a r a c t e r i z e d in that the filling duct (27) having been provided with a closing organ (25) and a mano¬ meter (26) is connected to the levelling tank (2l). pFaEA OM?Ϊ ^. |
Technical fields
The invention relates to an energy storing st-and for putting equipments into motion; the stand comprises -an equalizing cylinder and a control cylinder, while on the piston rod of the equalizing cylinder a load-carrying plate is arranged.
Background art
In general, the known energy storing stands, as e.g. the stands of TV-camerae, drawing desks are provided with a counterweight or a hydraulic telescope and since according to the relating prescriptions the stands must be portable, beside the adjusting means an arresting device is also require .
The arrππ of the invention is to provide an energy storing stand, with which the moving force needed for the adjust¬ ment amounts to the fractional part of the weight to be moved; a further requirement lies in that after having stopped the external force, the equipment should be suitab to prevent the displacement of the instrument having been arranged on the stand without a separate arrester.
Disclosure of the Invention
The essence of the invention lies in that the space below the piston of the equalizing cylinder is connected to a
OMPI
levelling tank via a conduit and a way-valve being suit- able for opening and closing said conduit, while the space below the control piston of the control cylinder and the space above the control piston are connected to the control input of the way-valve through a check-valve each.
Brief Description of Drawings
The invention will be described in details by means of a preferred embodiment, by the aid of the drawing enclosed showing the schematical view of the energy storing stand according to the invention.
Best Made of Carrying out the Invention
Referring to figure 1, the load-carrying plate 1 of the stand is arranged on the piston rod of the piston 3 of the equalizing cylinder 2. The part of the piston rod k lying in the vicinity of the load-carrying plate 1 is pre- ferably compact, while the lower part is formed as a hollow cylinder, representing the control cylinder 6 for the •guidance of the control piston 5 - The control piston 5 is provided with the piston rod 7 having been formed as a double-walled pipe; the channel 8 in the piston rod 7 connects the space above the control piston 5 with the check-valve 11 via the duct 10 having been connected to the opposite end of the piston rod 7«
The piston rod 7 i fixed to the equalizing cylinder at the lower lid thereof, simultaneously the channel 8 in the piston rod 7 a -i the pipe 12 enclosing the same are led through the lower lid of the equalizing cylinder 2. The pipe 12 is provided with an upper orfice 1 and a lower orfice !•**• The upper orfice 13 connects the inner cavity of the pipe 12 with the space 15 below the control piston 5 -a d it is preferably arranged directly below the
control piston 5, while the lower orfice Ik arranged on that part of the pipe 12, which is lying under the equalizing cylinder 2 and it communicates with another check valve 17 via the channel 16. The check-valves 11 . and 17 are arranged so, as to open when the medium ±s streaming from the direction of the channel 8 and the pipe 12, respectively, and to close, when the medium is streaming from the opposite direction. The commoned outputs of the check-valves 11 and 17 are connected to the control input of the way-valve 18 being suitable for opening and closing. ¥ith the embodiment specified he__^ the way-valve 18 is a remotely-controlled shut-off valve. The way-valve 18 is built into the duct 22 which interconnects the space 20 under the piston 3 and the levelling tank 21 through the orfice 19 formed on the bottom of the equalizing cylinder 2.
Between the common point of the channel 10 and the check- -valve 11 and the atmosphere, as well as between the common point of the channel 16 and the other check-valve 17 and the atmosphere a throttle check-valve 23, 2k each is inserted for the blow-off to the atmosphere and the air intake therefrom.
Preferably, a filling duct 27 - having been provided with the closing organ 25 and the manometer 26 - is connected to the levelling tank 21 via the duct 22, interconnecting said levelling tank 21 and the way-valve 18.
The energy storing stand operates, as follows:
The mass M having be-en .arranged on the load-carrying plat 1 is compensated with the pressure of the air or gas con- tained in the equalizing cylinder. Vhen lifting or sinking the mass 11, the compensating air or gas is streaming into the levelling tank 21 and out therefrom. Streaming is taki place through the way-valve 18. This is the main circuit performing the compensation of the stand.
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The basic principle of the compensation of the stand lies in that in the static condition the way- alve 18 isolates the equalizing cylinder 2 from the levelling tank 21, as a consequence-, the pressure needed for compensating the mass M is automatically established in the equalizing cylinder 2. However, when the stand and the mass M are displaced in whichever direction, the way-valve allows the free flow between the equalizing cylinder 2 and the levellin tank 21, as a consequence, the volumetric change of the space 20 below the piston 3 of the equalizing cylinder 2 can be well compensated from the levelling tank 21.
Since in this case, simultaneously the volume of the space 28 above the piston 3 °f tke equalizing cylinder is also changing, the space 28 may communicate with the atmosphere through the orfice 2 . The auxiliary circuit performing the compensation of the stand consists of the channels and armatures connecting the control cylin -^ 6 to the control input of the way- alve 18 • ¥ith the embodiment shown here, the control cylinder 6 is designed so, that in relation to the equalizing cylinder 2 the control cylinder 6 is moving and the control piston 5 is in standstill.
As the channel 8 in the piston rod 7 formed as a double- -walled pipe is interconnecting the space 9 above the control piston 5 a d the atmosphere via the channel 10 and the throttle-check valve 23, and the pipe 12 interconnects the space 15 below the control piston -and the atmosphere via the other chan el 16 and the other throttle check- alve 2k, connection with the control input of the way-valve 18 is established via the check-valve 11 and the check-valve 17 respectively.
In case, if the piston is displaced, e. g. upwards, the air is streaming from the space 15 through the upper orfice 13, the pipe 12, the lower orfice J.k, the channel 16
and the throttle check-valve 2k, it opens the way-valve 18 through the other check-valve 17 and the control input of said way-valve, as a consequence, the air may freely stream from the levelling tank 21 into the space 20 havin been increased in the described manner.
Simultaneously - due to the increased volume of the space 9 - air is streaming through the inner channel 8 - com¬ municating with the inner space 9 above the control pisto the channel 10 and the throttle check-valve 23 from the a mosphere into the space above the control piston 5« The process of equalization is the same in course of the down- ward notion.
The system is charged and discharged, respectively, throug the filling duct 27.
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