WO2020143211A1

WO2020143211A1 - Novel supporting leg in mobile scaffold

Info

Publication number: WO2020143211A1
Application number: PCT/CN2019/097010
Authority: WO
Inventors: 徐田; 孔庆哲; 胡元伦; 刘方杰
Original assignee: 山东恒堃机械有限公司
Priority date: 2019-01-09
Filing date: 2019-07-22
Publication date: 2020-07-16
Also published as: CN209602964U

Abstract

A supporting leg in a mobile scaffold. After the mobile scaffold is moved vertically into position, two joists (2) are horizontally inserted into a socket of a bridge pier (1); the bottom end of the supporting leg (3) is connected to the outer ends of the joists (2) by means of bolts; the supporting leg (3), a jacking cylinder (6) and a balance beam (7) provide support to a distribution beam (11), thereby supporting a main beam (5); and then steel bar binding and concrete pouring may be carried out on the bridge pier (1) to form a box beam (9), and the position where each supporting leg (3) penetrates the box beam (9) is a pre-arranged hole. Four supporting legs (3) are all arranged at the outer side of the front or rear ends of a bridge section, thus avoiding the dense section of poured connected reinforcing steel bars. After concrete curing is completed, a piston rod of the jacking cylinder (6) extends outwards to drive the corresponding balance beam (7) to move up, so that the distribution beam (11) drives the main beam (5) to move up, at which moment a middle trolley (10) moves to the lower end of the main beam (5), the piston rod of the jacking cylinder (6) retracts inwards, the lower end of the main beam (5) contacts the upper end of the middle trolley (10), and the lower end of the middle trolley (10) is located at the upper end of the box beam (9), at which moment the middle trolley (10) supports the main beam (5) and releases the supporting force of the supporting legs (3).

Description

Outrigger in a new type mobile formwork

Technical field

The utility model relates to the technical field of bridge machinery, in particular to a new type of movable mold frame supporting legs.

Background technique

In the conventional upward mobile formwork, the middle leg is supported on the top of the pier. When continuous beams are constructed, the box beam at the top of the pier is densely reinforced, and a larger reserved hole needs to be reserved for the installation and removal of the middle leg. After the box girder construction is completed, the reinforcement of the reserved holes is completed through the reinforcement of the steel bars and the post-concrete of the concrete. However, due to the dense reinforcement of the box girder at the top of the pier, it is difficult to implement in the reinforcement process in the later stage and the quality cannot be guaranteed.

Summary of the invention

In order to overcome the deficiencies of the above technology, the utility model provides a new type of movable support in the mobile formwork which avoids the dense section of the box beam reinforcement and ensures the reinforcing quality of the box beam.

The technical scheme adopted by the utility model to overcome its technical problems is:

A new type of movable formwork supports, including bridge piers and main beams arranged at the upper end of the bridge piers, and also includes:

The two jacks are respectively arranged on the left and right sides of the bridge pier in the horizontal direction, and joist beams are horizontally inserted into each preset hole, and the front and rear ends of each joist beam are respectively vertically installed with bolts and legs. All are located outside the front or back of the pier;

The jacking cylinders are installed vertically above the legs, and the upper end of each jacking cylinder is installed with a balance beam through bolts;

The distribution beam is horizontally arranged at the upper end of the main beam, and the lower end of the distribution beam is connected to the upper end of the main beam by bolts. The front and back sides of the distribution beam are horizontally provided with slide rails in the left and right directions respectively, and the two balances are located at the rear end of the pier. The upper end of the beam is slidingly installed on the slide rail on the rear side of the distribution beam, and the upper ends of the two balance beams at the front of the bridge pier are slidingly installed on the slide rail on the front side of the distribution beam;

Each balance beam drives it to slide left and right along the slide rail through the balance beam drive mechanism;

The outrigger lifting mechanism is installed on the distribution beam to lift the outrigger, so that the outrigger is located above the box girder after lifting;

The two balance beams at the front of the pier and the two balance beams at the back of the pier are connected and fixed by a connecting frame II, and the two balance beams at the left of the pier and the two balance beams at the right of the pier are connected by a connecting frame Ⅰ The connection is fixed. When the four lifting cylinders drive the balance beam to move upward, the distance between the main beam and the poured box girder is greater than the height of the small car.

Further, the above-mentioned balance beam driving mechanism is a traverse cylinder, the tail end of the traverse cylinder is connected to the distribution beam, and the head end is connected to the balance beam. The axis of the traverse cylinder is parallel to the length direction of the slide rail.

Further, the above-mentioned outrigger lifting mechanism is a hand chain hoist provided on the upper end of the distribution beam.

The beneficial effect of the utility model is that after the movable formwork is longitudinally moved into position, two joist beams are horizontally inserted into the jacks of the bridge pier, and the bottom end of the leg is connected to the outer end of the joist beam by bolts. The jacking cylinder and balance beam serve as support for the distribution beam, so as to support the main beam, and then the steel pier can be tied and concrete poured on the pier to form a box beam, and the position where each leg passes through the box beam is Preset holes. The four legs are set outside the front or rear ends of the bridge section, thus avoiding the dense section of connected reinforcement. After the concrete curing is completed, the piston rod of the jacking cylinder extends outwards, which drives the corresponding balance beam to move up, so that the distribution beam drives the main beam upward. At this time, the small and medium car moves to the lower end of the main beam, lifting the cylinder The piston rod retracts inward, the lower end of the main beam contacts the upper end of the small and medium car, and the lower end of the small and medium car is located at the upper end of the box beam. At this time, the small and medium car supports the main beam and releases the supporting force of the outriggers.

BRIEF DESCRIPTION

1 is a schematic view of the front view of the utility model of the supporting leg in a stressed state;

2 is a schematic view of the front view of the utility model box beam connected to the main beam through the middle and small cars;

FIG. 3 is a schematic diagram of a side view of the force state of the supporting leg of the utility model;

4 is a schematic view of the side structure of the box girder of the present invention connected to the main girder through a small and medium car;

In the picture, 1. Bridge pier 2. Support beam 3. Support leg 4. Connection frame I 5. Main beam 6. Jacking cylinder 7. Balance beam 8. Hand chain hoist 9. Box beam 10. Middle and small car 11. Distribution beam 12 . Traverse cylinder 13. Connection frame Ⅱ.

detailed description

The utility model will be further described below with reference to FIG. 1 and FIG. 2.

A new type of movable formwork supporting leg includes a pier 1 and a main beam 5 provided at the upper end of the pier 1, and further includes: two insertion holes, which are respectively arranged on the left and right sides of the pier 1 along the horizontal direction, and each preset hole A joist 2 is installed horizontally inside, and the front and rear ends of each joist 2 are vertically installed with bolts 3 through bolts, and the legs 3 are located outside the front or rear ends of the pier 1; the jacking cylinder 6 is installed vertically Above the support leg 3, a balance beam 7 is installed at the upper end of each jacking cylinder 6 by bolts; a distribution beam 11 is horizontally arranged at the upper end of the main beam 5, and the lower end of the distribution beam 11 is connected to the upper end of the main beam 5 by bolts. The distribution beam 11 is provided with slide rails horizontally in the left-right direction at the front and rear sides, and the upper ends of the two balance beams 7 at the rear end of the bridge pier 1 are slidingly installed on the slide rails at the rear side of the distribution beam 11, and the two balances at the front end of the bridge pier 1 The upper end of the beam 7 is slidingly installed on the slide rail on the front side of the distribution beam 11; each balance beam 7 is driven to slide left and right along the slide rail by a balance beam drive mechanism; the outrigger lifting mechanism is provided on the distribution beam 11 for Lift the outrigger 3 so that the outrigger 3 is located above the box beam 9 after being lifted; the two balance beams 7 at the front end of the pier 1 and the two balance beams 7 at the rear end of the pier 1 are connected and fixed by a connecting frame II 13 The two balance beams 7 on the left side of the pier 1 and the two balance beams 7 on the right side of the pier 1 are connected and fixed by a connecting frame I4. When the four lifting cylinders 6 drive the balance beam 7 to move upward, the main beam 5 and The distance between the poured box beams 9 is greater than the height of the trolley 10. As shown in FIG. 1 and FIG. 3, after the movable formwork is longitudinally moved into position, the two joists 2 are horizontally inserted into the jacks of the pier 1, and the bottom end of the leg 3 is connected to the joists 2 by bolts. The outer ends are connected, and the legs 3, jacking cylinders 6, and balance beams 7 support the distribution beams 11, thereby supporting the main beams 5, and then the steel bars can be tied and concrete poured on the pier 1 to make For the box beam 9, the position where each leg 3 passes through the box beam 9 is a preset hole. The four legs 3 are arranged outside the front end or the rear end of the bridge section 1, thus avoiding the dense section of the connected 9 steel bars. After the concrete curing is completed, the piston rod of the jacking cylinder 6 is extended outward, which drives the corresponding balance beam 7 to move up, so that the distribution beam 11 drives the main beam 5 to move up. At this time, the trolley 10 moves to the main beam 5 At the lower end, the piston rod of the jacking cylinder 6 retracts inwards, and the lower end of the main beam 5 contacts the upper end of the middle and small cart 10, and the lower end of the middle and small cart is located at the upper end of the box beam 9, and the middle and small cart 10 supports the main beam 5 at this time. The supporting force of the leg 3 loosens the bolts at the connection between the lower end of the leg 3 and the joist 2, and the bolts at the connection between the upper end of the leg 3 and the jack cylinder 6, as shown in Figures 2 and 4 As shown, the connection frame I4 is removed, and the outrigger 3 is lifted up to the upper end of the box beam 9 through the outrigger lifting mechanism. Since the connection frame I4 has been removed, it will not be driven with the balance beam when lifting up Institutional interference. After the lifting of the outrigger 3 is completed, the complete system of the middle outrigger passes through the whole hole along with the movable formwork and is in place with the next span, repeating the above process.

The drive mechanism of the balance beam may be a traverse cylinder 12, the trailing end of the traverse cylinder 12 is connected to the distribution beam 11, and the head end is connected to the balance beam 7. The axis of the traverse cylinder 12 is parallel to the length direction of the slide rail . When the piston rod of the traverse cylinder 12 extends outward, it pushes the balance beam 7 to slide outward along the slide rail at the lower end of the distribution beam 11 to achieve the purpose of moving the traverse cylinder 12 to the outside.

The outrigger lifting mechanism may be a chain hoist 8 provided on the upper end of the distribution beam 11. When the leg 3 needs to be lifted, hook the iron hook at the lower end of the hand hoist 8 to the leg 3, and the leg 3 can be pulled upward by pulling the chain of the hand hoist 8.

Claims

The legs in a new type of movable formwork include a bridge pier (1) and a main beam (5) provided at the upper end of the bridge pier (1). The utility model is characterized in that it further includes:

The two jacks are respectively arranged on the left and right sides of the bridge pier (1) in the horizontal direction, and the joist beam (2) is horizontally inserted in each preset hole, and the front and rear ends of each joist beam (2) are respectively bolted The legs (3) are installed vertically, and the legs (3) are all located outside the front end or the rear end of the bridge pier (1);

The jacking cylinder (6) is vertically installed above the supporting leg (3), and the upper end of each jacking cylinder (6) is installed with a balance beam (7) through bolts;

The distribution beam (11) is horizontally arranged on the upper end of the main beam (5), the lower end of the distribution beam (11) and the upper end of the main beam (5) are connected by bolts, and the front and back sides of the lower end of the distribution beam (11) are respectively along Slide rails are provided horizontally in the left-right direction. The upper ends of the two balance beams (7) at the rear end of the bridge pier (1) are slidably installed on the slide rails behind the distribution beam (11), and the two balance beams at the front end of the pier (1) (7) The upper end is slidingly installed on the slide rail on the front side of the distribution beam (11);

Each balance beam (7) is driven by the balance beam drive mechanism to slide left and right along the slide rail;

The outrigger lifting mechanism is installed on the distribution beam (11) and used for lifting the outrigger (3) so that the outrigger (3) is located above the box beam (9) after being lifted;

The two balance beams (7) at the front end of the pier (1) and the two balance beams (7) at the rear end of the pier (1) are connected and fixed by a connecting frame II (13), and the two on the left side of the pier (1) A balance beam (7) and two balance beams (7) located on the right side of the bridge pier (1) are connected and fixed by a connecting frame I (4). When four jacking cylinders (6) drive the balance beam (7) upward When moving, the distance between the main beam (5) and the cast box girder (9) is greater than the height of the middle trolley (10).
The outrigger in the new mobile formwork according to claim 1, characterized in that the drive mechanism of the balance beam is a traverse cylinder (12), and the trailing end of the traverse cylinder (12) and the distribution beam (11) The head end is connected with the balance beam (7), and the axis of the traverse cylinder (12) is parallel to the length direction of the slide rail.
The outrigger in the new mobile formwork according to claim 1, characterized in that the outrigger lifting mechanism is a hand chain hoist (8) provided on the upper end of the distribution beam (11).