CN100497833C - High-altitude framework type simple plate supporting machine - Google Patents

Abstract

The invention is a high-altitude frame-type simple erecting machine. Its structure is that the gantry connecting beam is connected with the upper column of the gantry, the upper column of the gantry is connected with the hoisting truss aisle beam, and the hoisting truss aisle beam is connected with the gantry lower column. Then, the lifting trolley is set on the lifting truss, the front and rear end points of the lifting truss are seated on the aisle beam of the lifting truss, the front wheel box group and the rear wheel box group are set under the lower column of the gantry; The traveling wheel box group and the rear traveling wheel box group are located on the aisle of the transport vehicle, and the front and rear wheel tracks are set under the aisle of the transport vehicle; multiple steel truss upper chords are arranged on the upper chord of the steel truss girder Node, the steel truss girder upper chord is cable-stayed to the steel truss girder longitudinal beam, and the electric hoist is hung on the bottom surface of the gantry connecting beam. Advantages: vertical and horizontal self-propelled, four concrete bridge decks in each section are erected in place at one time; the conventional universal rod structure is used to assemble a frame structure, the overall stability is good, the wind load resistance is strong, the production time is short and the cost is low, and the use easy and convenient.

Description

High-altitude frame type simple racking machine

technical field

The invention relates to a high-altitude frame-type simple lifting machine, which belongs to the technical field of high-altitude frame-type lifting machines.

Background technique

Usually, when the concrete bridge deck of the slab-truss composite structure beam is of appropriate size, small self-weight, and low pier height, the first few sections are erected on the ground with a crane, and the tire-type truck crane is hoisted to the bridge. The front concrete bridge deck is erected on the surface. However, in the construction of a large-scale bridge with a large concrete bridge deck structure (11.52x5.62m) and a large weight (400KN), if the truck crane is used to erect the beam on the bridge surface, there are the following defects: because the bridge deck structure is large in size, the use of When working with a single mobile crane (limited by the conditions on the bridge surface, the side slab can only be erected with a single crane), the working radius is at least 9m, so a car crane with a rated lifting capacity of more than 100t is required Carry out slab erection work; since the concrete bridge deck at the crane station on the bridge deck has not yet been poured in-situ with wet joints, it cannot form a slab truss structure with the steel truss girder to bear the force together, so it can only be used on three sides (or four sides) ) supported simply supported slabs to check the force of the concrete bridge deck construction state. It should be said that the design of the concrete bridge deck in this construction scheme is controlled by the construction load, and the design section needs to be enlarged; it is limited by the working radius of the mobile crane , every time a concrete bridge deck is erected, the crane needs to adjust its position once, and the 4 concrete deck panels in each section cannot be erected in place at one time, and the construction is more cumbersome.

Contents of the invention

The present invention aims at above-mentioned defect, proposes a kind of high-altitude frame type simple erecting machine, realizes to complete the erecting operation with a car crane whose rated lifting capacity is more than 100t.

Technical solution of the present invention: its structure is to comprise gantry connecting beam, gantry upper column, gantry lower column, lifting truss aisle beam, lifting truss, lifting trolley, and running system; wherein gantry connecting beam and The upper column of the gantry is connected, the upper column of the gantry is connected with the aisle beam of the lifting truss, the aisle beam of the lifting truss is connected with the lower column of the gantry, the lifting trolley is set on the lifting truss, and the front and rear ends of the lifting truss It is located on the aisle beam of the lifting truss, and the front wheel box group and the rear wheel box group in the running system are set under the lower column of the gantry; The front wheel box group in the system walks on the front wheel track on the upper chord of the steel truss girder, and the rear wheel box set walks on the rear wheel track on the erected concrete bridge deck; On the middle plate of the concrete bridge deck (inside the beam span of the hoisting truss walkway); the electric hoist is hung on the bottom surface of the gantry connecting beam.

Advantages of the present invention: the simple erecting machine is a large-scale lifting device developed by itself for erecting concrete bridge decks of large-scale highway bridge trusses combined with continuous beams. The feature of erecting in place at one time, according to the working principle of the gantry crane, is set up to operate on the bridge deck with a height of more than 40 meters, with an operating area of 75 square meters. It is a large structural size (11.52 X 5.62m), heavy weight (400KN) highway Special erection equipment for slab truss combined with continuous girder concrete bridge deck; the erection machine adopts the upper side (horizontal) separated double-gantry connecting beam; the four cart wheel boxes on the lower side are separated from each other, and the upper side is used as one side The connecting beam of the two legs is also used as the track beam of the lifting truss beam, so that the erecting machine structure forming the frame not only meets the vertical and horizontal self-propelled functions of the large-scale lifting equipment, but also increases the wind load resistance of high-altitude operations. It has the function of excellent overall stability; the principle of fixed factory workshop truss car structure is introduced, and the lifting truss is arranged on the gantry column to bear the lifting truss track beam when the concrete bridge deck is hoisted; both gantry beams are hung under The 3t electric hoist is used for the installation of the front and rear wheel track equipment of the racking machine for high-altitude operations, and truly realizes fully mechanized operations; It has the characteristics of short assembly time, low cost and small investment, which not only has considerable economic and social benefits, but also expands the new space for assembling large-scale lifting equipment with conventional universal rods; through structural force analysis and on-site use, frame type The simple racking machine can be used as a large-scale hoisting machine to erect large-area panels, which opens up a new way for the development of hoisting machine structures; four independently set traveling wheel boxes are arranged at a distance of 12m in the horizontal direction and 26m in the vertical direction. Good stability. The height of the truss aisle beam is set so that the trolley can pass under the aisle beam, and the concrete slab can be transported in place at one time, which is simple and convenient to use.

Description of drawings

Accompanying drawing 1 is a planar (longitudinal) elevation view of a door frame of a trigger plate machine.

Accompanying drawing 2 is the cross-sectional view of running before the trigger.

Accompanying drawing 3 is the traveling sectional view behind the trigger.

Accompanying drawing 4 is the layout diagram of the concrete bridge deck on the steel truss.

In the figure, 1 is the connecting beam of the gantry, 2 is the upper column of the gantry, 3 is the lower column of the gantry, 4 is the aisle beam of the lifting truss, 5 is the lifting truss, 6 is the lifting trolley, and 7 is the front wheel box Group, 8 is the rear traveling wheel box group, 9 is the electric hoist, 10 is the front traveling wheel track, 11 is the rear traveling wheel track, 12 is the aisle of the transport vehicle, 13 is the concrete bridge deck transport vehicle, 14 is the concrete bridge deck 15 is the upper chord of the steel truss girder, 16 is the longitudinal girder of the steel truss girder, 17 is the middle plate of the concrete bridge deck, 18 is the side plate of the concrete bridge deck, and 19 is the upper chord node of the steel truss girder.

Detailed ways

Referring to the accompanying drawings, its structure includes gantry connecting beam 1, gantry upper column 2, gantry lower column 3, lifting truss aisle beam 4, lifting truss 5, lifting trolley 6, and running system; wherein the gantry The connecting beam 1 is connected with the upper column 2 of the gantry, the upper column 2 of the gantry is connected with the aisle beam 4 of the hoisting truss, the aisle beam 4 of the hoisting truss is connected with the lower column 3 of the gantry, and the lifting trolley 6 is set on the lifting platform. On the truss 5, the front and rear end points of the lifting truss are located on the aisle beam 4 of the lifting truss, and the front traveling wheel box group 7 and the rear traveling wheel box group 8 in the traveling system are arranged under the lower column 3 of the gantry; The upper chords of the steel truss girders are connected as a whole through the upper chord nodes. The front wheel box group 7 in the running system travels on the front wheel track 10 on the steel truss upper chord, and the rear wheel box group 8 runs on the erected The rear walking wheel track 11 on the concrete bridge deck walks; the transport vehicle board walkway 12 is arranged on the middle plate 17 of the concrete bridge deck (inside the beam span of the lifting truss walkway); the electric hoist 9 is hung on the door frame connecting beam 1 bottom surface.

The fulcrums of the four cart running wheels are arranged at a large interval of 12m in the horizontal direction and 26m in the vertical direction.

The height of the hoisting truss is set, and the concrete slab transport vehicle can be directly transported from the bottom of the aisle beam of the hoisting truss to the inner span of the hoisting truss; the electric hoist is hung under the beam of the gantry to install the traveling wheel track equipment.

It is assembled with the conventional universal rod structure of construction engineering.

The main components of the simple frame-type truss-plate mechanism frame are the gantry connecting beam 1, the upper column of the gantry 2, the lower column of the gantry 3, and the lifting truss walkway beam 4, which are used to resist wind loads, withstand the moving load of the lifting truss, and maintain The main force-bearing structure of the machine's working stability.

Lifting truss girder 5 is the main truss girder for lifting the deck of the bridge, with a span of 24 meters. The lifting truss girder structure is also assembled with universal rods, with a lifting capacity of 500KN. To realize the lifting, alignment and erection of the concrete bridge deck by moving back and forth.

Lifting trolley 6 is made up of a 75KN winch, the block block group that magnification is 10, and lifting capacity is 500KN, can move forward and backward along the lifting truss beam.

The four groups of wheel boxes running longitudinally on the mast are all active wheel boxes. The first two groups of wheel box groups 7 are set on the upper chord 17 of the steel truss beam with steel sleepers + rail tracks, and the last two groups of wheel box groups 8 are on the existing The erected concrete bridge deck is laid with sleepers + steel rails to walk on.

The electric hoist 9 has a lifting weight of 30KN and is hung on the bottom surface of the gantry connecting beam, which is used to spread and disassemble the running track of the trigger plate, so as to realize the fully mechanized operation of bridge deck erection.

Required materials and equipment

serial number name Weight (t) Remark 1 Universal rod 125.3 Include 15% of bolt weight 2 New bar 47.1 Include 15% of bolt weight 3 Hoist and traveling crane 15.0 4 500KN Crane 1 5 30KN electric hoist 2 6 travel reducer 6 7 7.5KW motor 6

The main force-bearing truss of the simple erecting machine adopts the conventional universal rod material in the construction of bridge construction enterprises. On the beam, the column on the portal frame adopts a special-shaped structure of 1m on the portal frame plane, and the oblique bars, cross bars and gusset plates of this part are all new parts.

The longitudinal and lateral forces of the simple erecting machine can be simplified into a rigid mast mode, and the deflection of the longitudinal and transverse beams of the mast of the erecting machine is designed according to f≤L/700, the stable overturning coefficient K≥1.3, and the natural vibration period T≤[T]=0.3s to check the strength, stiffness, overall stability and natural vibration period.

Concrete bridge deck erection process:

Hoisting and transportation of the concrete bridge deck → Erection of the first three inter-node concrete bridge decks with an elevated gantry crane → Assembly of the frame-type simple erection machine → Transportation and lifting of the concrete bridge deck (with an elevated gantry crane) → Transport of the concrete bridge deck on the bridge surface to The position of the erecting plate → erecting the middle plate 17 → erecting the side plate 18 → fixing the concrete bridge deck → laying the track of the erecting machine → moving the erecting machine forward to the next section → erecting the concrete bridge deck of the next section.

Use the ground elevated gantry crane at the bridge head to erect the steel truss girder top concrete bridge deck between the first three sections, use the elevated gantry crane and 50t truck crane to assemble the running track of the plate machine, the frame plate frame, and test the hoisting.

Use the overhead gantry crane to lift the concrete bridge deck transported from the precast yard, hang it on the pallet truck on the deck, and move the transport truck forward (passing under the lifting truss beam from the rear fulcrum), and transport the concrete bridge deck to the The frame-type simple shelf machine spans inside (see Figure 3).

The lifting trolley moves backward, lifts the middle plate of the concrete bridge deck (see Figure 4 for the arrangement of the middle plate and side plates of the concrete bridge deck on the steel truss girder), and the lifting truss moves laterally to align with the position of the plate to be erected (the position of the middle plate ), the lifting trolley moves forward to the erection section, falls and erects the middle plate of the concrete bridge deck; the lifting trolley uses the same method to erect another middle plate and two side panels of the intersection respectively.

Use the 3t electric hoist hung under the gantry connecting beam to install the running wheel track 10 (steel sleeper + rail) at the front fulcrum of the trigger on the main longitudinal beam in the next section and the running wheel track 11 (steel sleeper + steel rail) at the rear fulcrum of the trigger ), use the lifting truss to install the transport vehicle board walkway on the concrete bridge surface.

The erection machine is moved forward to the next section, and the concrete bridge deck of the next section is erected according to the above steps.

Claims (4)

1. The high-altitude frame-type simple lifting machine is characterized by including the gantry connecting beam, the gantry upper column, the gantry lower column, the lifting truss aisle beam, the lifting truss, the lifting trolley and the running system; The beam is connected with the upper column of the gantry, the upper column of the gantry is connected with the aisle beam of the lifting truss, the aisle beam of the lifting truss is connected with the lower column of the gantry, the lifting trolley is set on the lifting truss, the front of the lifting truss, The rear end point is located on the aisle beam of the hoisting truss, and the front wheel box group and the rear wheel box group in the running system are set under the lower column of the mast; the upper chords of the steel truss beams in each section are connected as a whole through the upper chord nodes , the front wheel box group in the running system is on the front wheel track on the steel truss upper chord, and the rear wheel box set is on the rear wheel track on the erected concrete bridge deck; On the middle plate of the concrete bridge deck; the electric hoist is hung on the bottom surface of the portal frame connecting beam. 2. The high-altitude frame-type simple lifting machine according to claim 1, characterized in that the four traveling wheel fulcrums are arranged at a large interval of 12m in the horizontal direction and 26m in the vertical direction. 3. The high-altitude frame-type simple erecting machine according to claim 1, characterized in that the height of the lifting truss is set, and the concrete slab transport vehicle is directly transported from the rear fulcrum under the lifting truss aisle beam to the inner span of the lifting truss; An electric hoist is hung under the connecting beam to install the traveling wheel track equipment. 4. The high-altitude frame-type simple erecting machine according to claim 1, characterized in that it is assembled by using a conventional universal rod structure in construction engineering.

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