DE2027605A1 - Oil pressure working cylinder for the lift operation - Google Patents

Description

The invention relates to an oil pressure working cylinder for lifting operation, which is suitable for lifting heavy objects. The invention relates in particular to a lifting method, in which a plurality of structural units are connected to one another one after the other from the ground and the Composite structure is raised by the height of a structural unit by means of an oil pressure work cylinder, as in the case of building a tower-like structure, for example a chimney or similar.

As the oil pressure working cylinder to be used for such lifting must move an object of considerable weight, it is along a plurality of guide rods graded, which are supported by a supporting device, such as a tower structure, hang down to lift the building blocks. In such In one case it is.required that ■ the oil pressure working cylinder compulsorily encompasses the Fiihruiigssäbe without slipping and that at the same time every step movement, the one the work processes of the Oldruckzyiinders is, with a evenly spaced unevenly spaced.

BATH ORIGINAL

Since the structural units to be lifted in the lifting process are quite heavy, as mentioned above, it is difficult to do so move heavy units in one place by a single oil pressure cylinder. Therefore one uses a suitable one Number of oil pressure cylinders of the type mentioned above in combination in order to share the load. If that's why each of the Oil pressure cylinders connected in parallel are not raised by the same change in distance at each stage of the lifting process partial loads occur which lead to various difficulties. '

As the variety of leadership continued by the Support structure, such as a tower structure, hanging, moving a heavy object, a change in the length of the rod can occur or the support structure itself, from which the guide rods hang, can bend. In addition, there is a difference between the manufacturing tolerances of the lifting mechanism including the oil pressure cylinder. This can it happens that a partial load is only applied to a special guide rod. This leads to the lifting process can not be continued smoothly that various difficulties arise, such as damage to the guide rod to which the partial load is applied.

The aim of the present invention is therefore to provide an oil pressure cylinder for a lifting device, with which the guide rods clasped without slippage can be. Any movement of the lifting device, i. H. every partial movement along the guide rods should be uniform be kept at a distance of the 'partial movement.

Should continue to be a lifting mechanism to be created, used in wuichem a Vielaahi oil pressure working cylinders zusammengeiäch.lo3S39ii vrarden, inn the heavy Baueinhei- •;!?! Ui au "- üb in La si I nufsuteilen, wöbet a partial burden

J VJ ^:. « \ ■ ι / 1 2 ^f i S BAD

Guide rods according to the one support system or the corresponding one Oil pressure cylinder is prevented automatically. In addition, a partial load should automatically be applied to the guide rods according to each support system and the oil pressure cylinder due to the change in length of the guide rods at Lifting operation, the bending up or deflection of the supporting structure, from which the guide rods depend, or due to the difference in manufacturing tolerances of the lifting mechanism including the oil pressure cylinder can be prevented.

Embodiments are illustrated by way of example with the aid of the accompanying drawings the present invention explained in more detail.

Fig. 1 shows in longitudinal section an oil pressure working cylinder for the lifting device according to the invention.

Fig. 2 shows a support structure for the guide rods, when using a plurality of oil pressure cylinders in one Numerous support systems during the lifting process a partial load on the guide rods corresponding to a support system and thus the corresponding oil pressure cylinder is prevented automatically.

In Fig. 1, a piston rod of cylindrical structure is denoted by 1, a piston provided on the top of the piston rod 1 is denoted by 2 and a cylinder body is denoted by 3 j, an upper oil pressure chamber is denoted by 3a and a lower oil pressure chamber is denoted by 3b. The piston rod guide k of cylindrical structure is inserted into the cylindrical piston rod 1, the piston rod guide k being seated in a sliding fit in the inner circumference of the piston rod 1. The upper end of the guide is firmly connected to the upper end of the cylinder body 3. Thus, when the piston rod 1 moves up and down, its inner circumference is not brought into direct contact with the circumference of a guide rod 13 which has a stop shoulder 14 on its circumference, which will be discussed in more detail later.

109815/1245 ORIGINAL BATHROOM

At the lower end of the piston rod 1, a lower clamp holder 5 is attached, the inner circumference of which has a downwardly extending inclined surface 5 ^a .

A clamping jaw 6 is inserted into the lower clamp holder 5, which consists of a plurality of segments, preferably three or more, and a truncated cone profile with a central opening Has.

fc is on the lower inner periphery of the lower clamp holder 5 a ring seat 7 forcibly attached. A coil spring 8, which normally wants to expand is arranged between the clamping jaw 6 and the ring seat 7.

On the top of the cylinder body 3 is an upper * clamp holder the same shape or substantially the same shape as the lower clamp holder 5 fixedly attached. In the upper clamp holder 9, a clamping jaw Io similar to the clamping jaw 6 is attached and a compression spring 12, which can normally expand, between an annular seat 11, which is fixed in the lower inner circumference of the upper clamp holder 9 is fitted, and the jaw Io is arranged.

The lower clamp holder 5 and the piston rod 1 are detachably connected to one another by suitable means such as a bolt, in the same way the upper clamp holder 9 and the cylinder body 3 are connected. Furthermore, the lower clamp holder 5 and the annular seat _7> sitting at the lower portion thereof, and the upper clamp holder 9 and the annular seat 11, which is seated at its lower portion, each coupled to one another by suitable means such as bolts.

A guide rod inserted in the piston rod guide k is denoted by 13. On the outer circumference of the guide tab 13 there is a plurality of stop shoulders l * t in one

109815 / 124S BATH ORIGINAL

Arranged at a distance from each other, which is shorter by Io to 25% than the stroke of the piston rod 1 (the stroke of the cylinder body 3). The stop shoulders ik are designed for engagement with the clamping jaws 6 or Io.

The structural units for a tower-like structure, such as a chimney or the like, are attached to the lower clamp holder 5 or the cylinder body 3 with suitable arms, not shown or brackets attached.

The oil pressure working cylinder according to the invention works as followsi When the clamping jaw 6 in the lower clamping holder 5 and the clamping jaw Io in the upper clamping holder 9 is in engagement with the stop shoulder 1A of the guide rod 13, as shown, an oil pressure pump (not shown) is oil pressure avtf the upper oil pressure chamber 3 ^a des Cylinder body 3 exercised. Since the clamping jaw 6 in the lower clamp holder 51 which is fixedly connected to the lower end of the piston rod 1 is brought into engagement with the stop shoulder Ik of the guide rod 13, the cylinder 3 is moved upward through a predetermined stroke by reaction.

The upward movement of the cylinder 3 becomes the upper Clamp holder 91 on the upper surface of the cylinder 3 attached is also moved upwards.

When the upper clamp holder 9 moves upward, its inclined surface 9aj is moved in parallel as shown by dash-dotted lines, with a clearance g sufficient for the jaw Io to move outward between the inclined surface 9a and the upper clamp holder 9 and the clamping jaw Io is created * This causes the clamping jaw Io through the action of the compression spring 12, which is calibrated normally between the ring seat 11 and the clamping jaw Io

109811/1245

202760b

want to expand, pushed up and against the inclined Surface 9a of the upper clamp holder 9 moves, which has moved in parallel and moved further along the guide rod 13, since the clamp holder 9 is moved upwards. Finally he comes with the stop shoulder l4, the one step is above the guide rod 13, in engagement.

Then the oil pressure in the upper oil pressure chamber becomes yes. of the cylinder body 3 is released and oil pressure is applied to the lower oil pressure chamber 3b of the cylinder body 3. Since the cylinder body 3 is not moved because the upper clamping jaw Io is in engagement with the stop shoulder 14 of the guide rod 13, the piston rod 1 is moved upward by a predetermined stroke by reaction. In this way, the lower clamping holder 5 becomes the is connected to the lower end of the piston rod 1, moves upwards and the lower jaw 6 in it comes into engagement with the stop shoulder which is arranged one step above the guide rod 13, as in the case of the upper jaw io.

By repeating the above operation, the oil pressure working cylinder A be moved step by step along the guide rod 13 upwards.

When assembling the guide rod 13, the upper clamping holder 9 (including the upper clamping jaw lo), the cylinder body 3 '(including the piston rod 1) and the lower clamping holder 5 (including the lower clamping jaw 6) are each placed on the guide rod 13. To remove the oil pressure working cylinder A from the guide rod 13, the upper clamp holder 9 _f, the cylinder body 3 and the lower clamp holder 5 can be pulled off the upper end of the guide rod 13 in this order.

108S1S / 124S

As can be seen from the above description, according to the invention, the oil pressure cylinder A can always be forcibly on the guide rod without slippage when lifting heavy parts, such as panels for buildings or systems including Structural units for chimneys or other tower-like structures, held in a clamped manner by air earths. Since every partial movement along the Guide rod always constant in the distance of the part or increments is held, it is possible to carry out the lifting operation smoothly and to maintain a desired height «

In Fig. 2, 15 is a support structure on a not shown Any tower-like structure and denoted by 13 a hanging guide rod which forms part of the lifting device. This guide rod corresponds to the guide rod of FIG. 1. Its upper end is connected to a piston 18 of an oil container l6 connected, which is provided on the support structure 15 is. At 17, a cylinder body for the oil tank or Oldumper l6 is referred to.

In Fig. 2, three hanging guide rods 13 for the support structure 15 are provided, which are a suitable distance from one another to have. The three hanging guide rods 13 share the load of a heavy component, not shown, such as a structural unit. There will be three old dumpers accordingly l6 used. .,

Different types of oil dumpers can be used. The hanging guide rods 13, which form part of the lifting device, are called piston rods for the Oldumper l6 used and the oil pressure chambers 19 of the Oldumper 16 are connected to branch lines 2oa, 2ob and 2oc of a common connecting pipe 2o.

109815/1245

202760b

At one end of the connecting pipe 2o is a shut-off valve, at the other end a pressure gauge 23 is provided, which is connected to a Stand knife faucet 22 is connected.

The oil pressure chamber 19 of the Oil dumpers l6 supplied via one end of the connecting pipe 2o in the unloaded state pressure oil, in which the oil printing work cylinder A on each of the hanging guide rods as shown in Fig. "1, sit, with a heavy component, such as a unit, but not yet on the lower clamp holder 5 or the cylinder body 3 is attached with suitable arms or brackets.

The oil pressure of the oil supplied to the oil ducts l6 should

for example, measured by the pressure indicator 23 to Io t (fjo kg / cm). The horizontal mounting height of each of the hanging guide rods 13 is set to a minimum tolerance and the stroke of each piston 17 is set to 15 wm + 1 mm.

After the setting, the shut-off valve 21 and the control valve 22 are closed. Then, the hanging Pülirungs ~ s "täbe 13 are loaded with the assembly * During the lifting of the assembly, when a partial load, for example, on the center guide rod 13 is exerted, the bean _v spruchung due to the different manufacturing tolerances of the lifting device including Öldurckarfoeitszylinder A, the difference in the attachment conditions for the lifting mechanism, the elongation of the hanging guide rods 13 and the deflection of the support structure 15 are increased. Thereby, the stroke of the middle oil dumper corresponding to the middle guide rod 13 is lowered by, for example, Io mm, and 01 is increased by the middle oil dumper l6 ( Oil volume 211 era) *

1Q9 & 15 / 124S
BATH

2027BOb

to the right and left oil dumpers l6 in substantially the same amount branched off through the branch pipe 2ob and the connecting pipe 2o. This will make the right and the left hanging rod 13 lifted accordingly.

As a result of this operation, the on the middle -hanging guide rod 13 and from there on the corresponding oil working cylinder A automatically reduced load; and the loading substantially evenly on each of the hanging guide rods 13 and thence on each the oil pressure working cylinder A distributed.

With this device, a partial load of guide rods in a support system, which is on the corresponding oil pressure cylinder acts, can be prevented automatically if a large number of support systems are used in parallel to carry the load on common support points for heavy components, such as structural units, to distribute.

Furthermore, the partial load on the guide rods in every support system and thus on the oil pressure working cylinder as a result of the change in length of the guide rods during lifting operation, the deflection of the support structure from which the guide rods hang and the difference in manufacturing tolerances the lifting device including the pressure working cylinder is set automatically.

1098 U / 1 $ 24

BAD WGfNAL

Claims (3)

202760b - Io - PATENT CLAIMS Γ.) Oil pressure working cylinder for lifting operation, characterized in that clamp holders (5i 9) _I each of which has a downwardly extending inclined surface (5a, 9a) formed on its inner periphery at the lower end of a cylindrical piston rod ( l) and attached to the upper end of a cylinder body (3), groups of clamping jaws (6, lo), each of which comprises a plurality of clamping jaws, _{fitted in the clamping holders (5 f} 9) and normally by coil springs (8, 12 ) are pressed upwards, the groups of clamping jaws (6, lo), when they form one piece, form a truncated cone profile with a central opening, a guide rod (l3) sits in the piston rod (l), the guide rod (13) stop shoulders (± 4) at a distance from one another which is equal to the stroke, and which are formed on the outer circumference, and the groups of clamping jaws (6, lo) hold the stop shoulders of the guide rod (13) in a clamping manner. 2. Oldruckarbeitszylxnder according to claim I _1, characterized in that the guide rod (13) stop shoulders (l4) on its outer circumference, which are spaced apart by Io to 25 % shorter than the stroke of the piston rod (l). 3. Oil pressure cylinder according to claim 1 or 2, characterized in that a cylindrical piston rod guide (4), the longitudinal direction along the outer circumference the guide rod (13) is slidably movable, 109818/1245 202760b is inserted into a through hole of the cylindrical piston rod (l), the upper end of the piston rod guide (4) is fixed to the cylinder body (3) in order to prevent the inner circumference of the piston rod (l) from interfering with the outer circumference of the guide rod (.13 ) comes into sliding contact that ring seats (7, H) are attached in the lower opening of the upper and lower clamp holders (5, 9) and clamping jaws (6, lo) and compression springs (8, 12) in the holders (5 _f 9 ) are housed. ¹ L, oil pressure cylinder according to one of the preceding claims, characterized in that the upper end of the guide rod (l3) is connected to the piston (l) of a plurality of oil containers (l6) and depends therefrom, which are at a suitable distance on a support structure (15 ) a tower are arranged, the oil pressure chambers (19) of the oil container or dumper (l6) are connected to a common connecting line (2o) and a suitable oil pressure value is applied in advance in the unloaded state, where the load as a heavy component, such as in the form of a structural unit, is not yet attached to the hanging guide rods (13). 109815/1245 Blank page