RU2225829C2 - Crane for mounting railway bridge framework - Google Patents

Abstract

FIELD: mechanical engineering; materials handling facilities. SUBSTANCE: proposed crane has main beam, two vertical portals, each arranged on support platform with supporting-and-running trucks, and load-lifting equipment. Main beam is boxsection, sectional. Support platform is made in form of rigid horizontal frame on crossmembers of which tracks for nondriven support trolley are rigidly secured. Load-lifting equipment is system of tackle blocks with electric winches. Standing blocks of all tackle blocks and said electric winches are arranged inside main beam. Two said tackle blocks of system are arranged, each, on main beam in plane of corresponding vertical portable. Crane is provided with two tilted portals. Lower ends of each of tilted portals and vertical portals are hinge-connected with frame of support platform, and their upper ends are rigidly connected to main beam. EFFECT: increased capacity at mounting of bridge frameworks. 5 dwg

Description

The invention relates to lifting and handling equipment, namely, lock cranes for installing spans of a railway bridge.

Known airlock for mounting spans of railway bridges, containing the base structure mounted on the platform, the front and rear portals for lifting it, a beam placed inside the base structure on freight carts, front and rear hinged supports of the main beam [1].

The disadvantages of the known crane are the design complexity and inconvenience in operation. If the crane relative to the installation direction of the spans is located on the back of the beam, then it is necessary to make a complete turn of its entire structure in one way or another.

Known airlock crane for mounting beam spans of railway bridges, comprising a rotary boom with extendable sections with end-mounted telescopic support racks pivotally attached to them, freight bogies with transverse beams for moving cargo, lock frames [2].

A disadvantage of the known sluice crane is the difficulty of bringing the crane into working position and increasing the installation time of the superstructure, as they double overlap the span: once with their own beam with its support on the distant support, and the second time with the superstructure.

The closest in technical essence and technical result is a sluice crane for installing spans of a railway bridge, containing a main beam installed at least on two vertical portals, each of which is placed on a support platform, lifting equipment [3].

A disadvantage of the known lock crane is the increase in the installation time of the superstructure, since before installing the superstructure in the span, it is necessary to overlap it with the main beam of the crane with it resting on a distant support.

The technical result of the invention is the expansion of the functionality of the airlock crane.

The specified technical result is achieved by the fact that according to the invention, the sluice crane for installing the spans of the railway bridge contains a main beam, two vertical portals, each of which is placed on a support platform with support-traveling trolleys, lifting equipment, while the main beam of the crane is made sectional, box-shaped sections, the supporting platform is made in the form of a rigid horizontal frame, on the crossbars of the latter are fixed ways on which it is not possible to swing odnaya support carriage, lifting equipment is a system of pulleys with electric winch comprising two reloading chain hoist, each of which is mounted on the main beam in the corresponding vertical portal plane while fixed blocks of pulley, in the system, and the corresponding electric winch arranged inside the main beam. The floodgate is equipped with at least two additional inclined portals, the lower ends of each of the inclined and vertical portals being pivotally connected to the frame of the supporting platform, and their upper ends are rigidly attached respectively to the main beam.

The invention is illustrated by drawings.

Figure 1 shows a lock crane, side view; figure 2 is the same, a top view; figure 3 is the same, a view in section aa; figure 4 is the same, a view in section BB; figure 5 (a-k) presents the technological scheme of the installation of spans of the railway bridge.

The lock crane on the railway track contains a platform 1 with support-traveling trolleys 2 mounted on a rail track, a sectional main beam 3 of box section, consisting of an average 4 and two cantilever sections 5, 6, two inclined 7 and two vertical 8 portals.

Platform 1 is a support frame made of two longitudinal 9 and two transverse 10 beams rigidly interconnected. To the longitudinal 9 beams from the bottom, with a certain step, the cross members 11 are rigidly fixed, on which the driving paths are represented, which are the guides 12, for double-curved wheels (not shown) of the non-driven support carriage 13. The support carriage 13 is mounted on the guides 12 with the possibility of longitudinal movement on them.

Each of the inclined portals 7 includes two struts 14 and each of the vertical portals 8 - two racks 15, the lower ends of which are pivotally mounted in paired gusses 16, respectively mounted on each end of the longitudinal beams 9, by means of fasteners, for example bolts 17, and their the upper ends are rigidly attached, for example, by multi-bolt connections (not shown in the drawing) to the side walls of the main beam 3.

The airlock crane is equipped with hoisting and electrical equipment, including main tackles 18, 19 with electric hoists 20, 21, auxiliary tackles 22, 23 with electric hoists 24, 25, respectively, tackles 26, 27 with electric hoists 28, 29, respectively, and power station 30. Each of the tipper pulley blocks 26, 27 mounted on the main beam 3 in the plane of the corresponding vertical portal 8.

The fixed blocks of the aforementioned chain hoists, their electric hoists and power station 30 are located inside the main beam 3.

The self-propelled airlock crane is equipped with two electric winches 31 with ropes 32 fixed to the rail track, for longitudinal movement (locking) of the span structures 33 through portals 7, 8 - two electric winches 34 with ropes attached to each of the movable spans 33 (in the drawing not shown).

Spans 33 are fed to the crane on two railway transport trolleys 35, and after locking through the portals 7, 8 they are installed on the front 36 and rear 37 railway trolleys, while the front 36 trolley is made above the rear 37 trolleys.

The technology of work on the installation of spans with a lock crane is as follows (figa-5k).

The lock crane is assembled using a jib crane, fed to the bridge by rail by a vehicle in a combined travel and positioned from the first bridge support at a distance equal to the length of the span to be installed (Fig. 5a). Then the car returns to the assembly site, where the spans are assembled 33.

The superstructure 33, appropriately placed on transport railway trolleys 35, is moved by a car under the crane and its front end is installed in the portals 7, 8 under the rear 27 reloading pulley, to which it is slinged and then lifted. Under the front end of the span 33, a support carriage 13 is rolled along the guides 12, lowered onto it (Fig. 5b), and the front transport rail carriage 35 is moved along the rail to the rear carriage 35 (Fig. 5c).

Then the span 33 is moved forward with the help of winches 34 and then lock through the front portals 8 and 7 (Fig.5g). The front end of the span 33 is slinged to the front 26 of the transfer belt and lifted above the support carriage 13, after which it moves along the guides 12 to the rear end of the span 33, while its front end is lowered onto the pre-rolled front 36 railroad carriage, and the freed rail transport trolleys 35 are rolled away using a car on a combined course to the installation site to load the next span 33 (Fig.5d).

Using winches 34, the span 33 is moved forward, and its rear end, raised by the front 26 overload pulley block above the support carriage 13, which rolls back along the guides 12, is lowered onto the rear 37 railroad trolley. After that, the crane with the help of winches 31 is installed over the span 33 in an appropriate manner for slinging the main 18 and auxiliary 22 chain hoists, and then they sling them. At the same time, the next span 33 is served under the console 6 of the crane from the side of the mounting platform and sling the main 19 and auxiliary 23 chain hoists, then it is lifted above the transport railway trolleys 35 (Fig.5zh-z). Using winches 31, a crane with spans 33 is fed forward to the length of the span 33 to be installed (Fig. 5i).

Then install the span 33 in the span (Fig.5K).

Then begins the next cycle of locking and installing the span, which in the previous cycle was a counterweight.

The last span 33 is installed in the span after locking through the portals 7.8 and after slinging with the main 19 pulley block from the side of the mounting pad of a special counterweight, which is fed from the mounting pad on railway transport trolleys 35.

There are options for using the proposed crane as a cantilever crane, for example, for installing spans with a laid bridge and passing it inside spans with a lower ride. In addition, the crane can be used for installation of flyovers with flat supports.

The proposed crane allows to reduce the complexity and time of installation of bridges. At the same time, the requirements for power and track condition on the approach to the bridge were significantly reduced.

The proposed crane with a large carrying capacity and metal consumption is a collapsible design of the elements transported by road.

Sources of information

1. SU No. 1062177, 12/28/1983.

2. SU No. 977367, 11/30/1982.

3. SU No. 983026, 12/23/1982 (prototype).

Claims (1)

A lock crane for installing spans of a railway bridge, comprising a main beam, two vertical portals, each of which is placed on a support platform with support-traveling trolleys, and lifting equipment, characterized in that the main beam is made of sectional box section, the support platform is made in the form a rigid horizontal frame, on the crossbars of the latter there are rigidly fixed paths on which a non-driving support carriage is mounted with the possibility of rolling, lifting equipment is These are the chain hoists with electric hoists, the fixed blocks of all chain hoists and the said hoists are located inside the main beam, while two of the mentioned chain hoists of the system are each located on the main beam in the plane of the corresponding vertical portal, and the crane is equipped with at least two more inclined portals. the lower ends of each of the inclined and vertical portals are pivotally connected to the frame of the supporting platform, and their upper ends are rigidly attached to the main beam.

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