RU-2861698-C1 - HYDRAULIC SYSTEM OF BRIDGE LAYER

RU2861698C1RU 2861698 C1RU2861698 C1RU 2861698C1RU-2861698-C1

Abstract

FIELD: bridge-laying equipment. SUBSTANCE: invention relates to hydraulic systems of a bridge layer installing a folding bridge span on an obstacle by the 'unfolding-sliding' method. The hydraulic system of the bridge layer comprises a hydraulic tank, pumps, pressure-relief unloading valves installed in hydraulic lines connecting pressure and drain lines, pressure and drain lines connecting, via distributors, said pumps and the hydraulic tank to control circuits of hydraulic motors of bridge span moving mechanisms, hydraulic cylinders of a front support, hydraulic cylinders for locking the bridge span, hydraulic cylinders of a laying frame, as well as hydraulic cylinders of front and rear mechanisms for unfolding end sections of the bridge span. Hydraulic cylinders with their control distributors are installed in the pressure line and are located on a rear support of the bridge layer, actuating hydraulic cylinders of a drive for connecting end and middle sections located in the bridge span. The hydraulic cylinders with mechanisms for unfolding front and rear end sections of the bridge span are located on the laying frame of the bridge layer. EFFECT: simplifying the design of the hydraulic drive of the unfolding and section connecting mechanisms while reducing the weight of the bridge span and enabling an increase in its length. 2 cl, 1 dwg

Inventors

ALABIN NIKOLAJ VLADIMIROVICH
BONDARENKO SERGEJ ANATOLEVICH
EGOROV VALERIJ VIKTOROVICH
EREMENKO BORIS IVANOVICH
Kovalchuk Aleksej Ivanovich
Kuzmenko Viktor Arsenevich
SERGAMASOV DMITRIJ MIKHAJLOVICH

Dates

Publication Date: 20260507
Application Date: 20251126

Claims (2)

1. A hydraulic system of a bridge layer comprising a hydraulic tank, pumps, safety and relief valves installed in hydraulic lines connecting pressure and drain lines, pressure and drain lines connecting through distributors the said pumps and the hydraulic tank with the control circuits of the hydraulic motors of the bridge block movement mechanisms, the hydraulic cylinders of the front support, the hydraulic cylinders of the bridge block locking, the hydraulic cylinders of the laying frame, as well as the hydraulic cylinders of the front and rear mechanisms for opening the end sections of the bridge block, characterized in that hydraulic cylinders with distributors for their control are installed in the pressure line and placed on the rear support of the bridge layer, actuating the hydraulic cylinders of the drive of the mechanisms for connecting the end and middle sections, located in the bridge block, wherein the hydraulic cylinders with the mechanisms for opening the front and rear end sections of the bridge block are placed on the laying frame of the bridge layer.
2. The hydraulic system according to paragraph 1, characterized in that a safety relief valve and a pump for operation in the accelerated mode of the front support, the laying frame, the mechanisms for moving the bridge block are installed in it and connected to the pressure lines, wherein a connection unit is installed in the hydraulic line connecting the pressure lines of the pumps, which, when it is open, ensures the unification of the flows of working fluid for the operation of the front support, the laying frame, the mechanisms for moving the bridge block in the normal and accelerated mode, and when it is closed, the separation of the flows for the operation of the front and rear opening mechanisms from individual pumps with the possibility of both simultaneous and sequential folding and unfolding of the end sections of the bridge block.

Description

The invention relates to bridge-crossing equipment, and specifically to hydraulic systems of a bridge-layer that installs a folding bridge block on an obstacle using the "unfolding-sliding" method, and can be used in laying a two-track bridge crossing over an obstacle both for military purposes and by emergency rescue service units in emergency situations. The hydraulic system of the MTU-20 bridge layer is known (see the Manual for the Material Part and Operation of the MTU-20 Tank Bridge Layer, 1969, p. 135, Fig. 48), which includes a hydraulic tank, hydraulic lines, a main pump and a hand pump for operation in emergency mode, check valves, an electromagnetic valve with a safety valve (a safety and unloading valve), a hydraulic booster for controlling the gearbox of the bridge laying mechanism (bridge block), control distributors for the hydraulic cylinders of the laying frame, the hydraulic cylinder of the outrigger (front support), the hydraulic cylinders of the bridge block locking, as well as the hydraulic cylinders of the front and rear mechanisms for opening and connecting sections, located in the bridge block and automatically connected to the hydraulic system of the bridge layer through docking units, one of which is located on the bridge layer, and the other two on the bridge block, one on each Each track allows the bridge to be accessed from either side. The front and rear pairs of end sections, stored in the transport position on the middle sections of the bridge block, are simultaneously unfolded and folded by the opening mechanisms. The disadvantage of this hydraulic system is the presence of complex, heavy-duty connecting units and the location of two of them in the bridge block, as well as the placement of hydraulic cylinders with heavy-duty opening mechanisms in the bridge block, which limits the length of the bridge to 22 meters and precludes its use on longer sections of the obstacle. The hydraulic system of the MTU-72 bridge layer is known (see "MTU-72 Bridge Layer". Technical Description. Page 451, Fig. 263), which differs from the hydraulic system of the MTU-20 bridge layer by the presence of two main pumps and two safety-unloading valves, the presence of an electric pump unit (instead of a hand pump), and also differs in that the drive of the mechanism for aiming (moving) the bridge block is carried out from hydraulic motors located on the laying frame, and the front support is driven by two hydraulic cylinders. This technical solution, in terms of its functional purpose and technical essence, is the closest to the claimed one and is accepted as a prototype. The disadvantage of this hydraulic system, as well as the previous analogue, is the presence of complexly designed docking units of large mass and the location of two of them in the bridge block, as well as the placement of hydraulic cylinders with mechanisms for opening large masses in the bridge block, which, in turn, affects the limitation of the length of the bridge block. The technical result of the invention consists in simplifying the design of the hydraulic drive of the opening mechanisms and the mechanisms for connecting sections, thereby ensuring a reduction in the weight of the bridge block and the possibility of increasing its length, as well as creating the possibility of unfolding and guiding the bridge block with end sections of increased length, laid one on top of the other, without increasing the time required to install the bridge on the obstacle. The technical result is achieved in that in the hydraulic system of the bridge layer, which contains a hydraulic tank, pumps, safety and relief valves installed in the hydraulic lines connecting the pressure and drain lines, the pressure and drain lines connecting through distributors the said pumps and the hydraulic tank with the control circuits of the hydraulic motors of the bridge block movement mechanisms, the hydraulic cylinders of the front support, the hydraulic cylinders of the bridge block locking, the hydraulic cylinders of the laying frame, as well as the hydraulic cylinders of the front and rear mechanisms for opening the end sections of the bridge block, according to the invention, hydraulic cylinders with distributors of their control are installed in the pressure line and placed on the rear support of the bridge layer, actuating the hydraulic cylinders of the drive of the mechanisms for connecting the end and middle sections, located in the bridge block, wherein the hydraulic cylinders with the mechanisms for opening the front and rear end sections of the bridge block are placed on the laying frame of the bridge layer. In this case, a safety relief valve and a pump for operation in the accelerated mode of the front support, the laying frame, the mechanisms for moving the bridge block are installed in it and connected to the pressure lines, while in the hydraulic line connecting the pressure lines of the pumps a connection unit is installed, which, when i