SU1634756A1 - Support-hoisting device of self-hoisting floatation plant - Google Patents

Abstract

The invention relates to lifting and lifting devices for self-lifting floating installations for various purposes (construction, drilling, etc.). The purpose of the invention is to reduce energy consumption by increasing the efficiency of the hydraulic drive. The device comprises a housing, a support column and the hydraulic cylinders 2 and 3 interacting with them, the Rod and the piston cavity of the hydraulic cylinders 2 are connected via a three-way valve 12 to the pressure 13 and drain 15 pump lines 14, and the rod and piston cavity of the hydraulic cylinders 3 are connected to the drain and pressure hydrolines through a three-point distribution valve 17. In the middle position of the hydraulic distributors 12 and 17, pressure 13 and drain 15 hydraulic lines are open. Above the level of hydraulic cylinders 2 and 3, an accumulator tank 6 is installed, to which hydraulic cylinders 3 are connected through an on-off valve 7. Hydraulic cylinders are lifted by all hydraulic cylinders 2 and 3, and hydraulic cylinders 2 are lifted only by hydraulic cylinders 2, into which the entire flow of pump 14 enters the hydraulic distributor 12. The hydraulic cylinders 3, moving synchronously to the hydraulic cylinders 2, displace the liquid from their rod cavities into the storage tank 6 through the two-directional hydraulic distributor 7, and into their piston strips These liquids flow by gravity from the tank. The invention allows to reduce energy consumption by increasing the efficiency of the hydraulic drive, as well as to reduce the size and intensity of the device. 2 pe. Ј (L O CO 4 J SP oe

Description

The invention relates to supporting and lifting devices for self-lifting floating installations for various purposes, in particular, construction and drilling.

The purpose of the invention is to reduce energy consumption by increasing the KP7D of the hydraulic drive.

Figure 1 shows the lifting device, General view; figure 2 - diagram of the hydraulic drive.

The support-lifting device contains a support column 1 and a drive mechanism interacting with it, including power hydraulic cylinders 2, which are hydraulically divided into two unequal

The main groups are smaller 2 and larger 3. Both groups 2 and 3 of the hydraulic cylinder are attached to the body 4 of the installation and the traverse 5, covering the supporting column 1 and having the ability to rigidly connect with it using a special splicing device (not shown). Above the level of hydraulic cylinders 2 and 3, an accumulator 6 is connected, connected through a two-way valve 7 to the cavities of hydraulic cylinders of a larger group 3 via lines 8 and 9, the cavities of the smaller cylinders of group 2 are interconnected by lines 10 and 11, and through a three-position the valve 12 - with a pressure line 13 of the hydraulic pump 14 and a discharge line 15 ,. going to the oil tank 16. The main lines 8 and 9 of the larger group of 3 hydraulic cylinders are connected to the discharge line 13 of the h4 pump and the drain line 15 through a three-position valve valve 17.

The operation of the device can be reduced to two typical operations: the descent (ascent) of the support column 1 and the permutation-traverse 5 - the first case, the ascent (descent) of the installation case 4 - the second case.

In the first case, the hydraulic distributors 7 and 12 are open, and the hydraulic distributor 17 is closed. Depending on the direction of movement of the support column 1 or the crosshead 5 (up or down) is set to the appropriate: position of the hydraulic distributor 12. Oil from the pump 14 through the pressure main 13 through the hydraulic distributor 12 enters through the smaller lines of hydraulic cylinders 10 group 2. Due to the fact that all the performance of the pump 14 is aimed at ensuring the stroke of not all hydraulic cylinders, but only of the smaller group 2, this stroke takes place at an increased speed. The cylinders of the larger group 3 move synchronously with the smaller group 2, but without load. At the same time, the oil from one cavities of the hydraulic cylinders 3 is displaced into the storage tank 6 through the hydraulic distributor 7, and from there by gravity flows into the other cavities of the hydraulic cylinders of the larger group 3. From the drain cavities of the smaller hydraulic cylinder heads of the second group 2, the oil flows through line 15

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In the second case, the hydraulic distributors 12 and 17 are open, and the hydrodistributor 7 is closed. Depending on the direction of movement of the casing 4 of the installation (up or down), the hydraulic distributors 12 and 17 switch to the corresponding position. The oil from the pump 14 flows along the pressure line 13 to all the hydraulic cylinders and a working stroke is made. From the drain cavities of the hydraulic cylinders at this stroke, the oil is discharged along line 15 to the oil tank 16. The reverse idling is performed as described in the first case.

In the proposed device, depending on what needs to be relocated at the moment: the supporting catholes relative to the installation body, the housing relative to the columns or just to the traverse relative to the columns — two or all eight hydraulic cylinders work. The raising (lowering) of the support columns, the bands and the shifting of the traverse are performed at an increased speed, which increases the efficiency of the drive and the device as a whole. During the descent (ascent) of the casing, all hydraulic cylinders are useful, the pump performance does not change, and the total time of the descent of the descent-ascent operations increases only slightly. The invention allows to reduce the energy consumption of the installation, as well as to reduce its dimensions and reduce the metal intensity.

Claims (1)

Invention Formula Support-lifting device of self-lifting floating installation, containing supporting columns, hydraulic hydraulic power cylinders interacting with them, pump, hydraulic tank, three-position hydraulic distributors included in hydraulic lines connecting piston and rod cavities of hydraulic cylinders with pressure and drain hydraulic lines, that, in order to reduce energy consumption by increasing the efficiency of the hydraulic drive, it is equipped with a two-way valve, additional hydraulic lines and a storage tank, hydrochloric level above the hydraulic cylinder, the piston rod end and the respective cylinders are connected via dopol516347566 via two positions of the three-position hydraulic distribution valve from the accumulators, the pressure and drainage units with the hydrolysis tank, while in the middle of the research are made open. / h S &, M M Fig N,. I