阅读说明：本技术 厂房桥机更新工程中的桥机拆卸和安装施工方法 (Bridge crane dismounting and mounting construction method in factory building bridge crane updating project ) 是由 程堂华 胡涛勇 韩一峰 于 2019-11-26 设计创作，主要内容包括：本发明涉及一种厂房桥机更新工程中的桥机拆卸和安装施工方法。本发明的目的是提供一种流程简单、操作方便、安全可靠、成本较低的厂房桥机更新工程中的桥机拆卸和安装施工方法。本发明的技术方案是：一种厂房桥机更新工程中的桥机拆卸和安装施工方法,包括旧桥机拆卸方法和新桥机安装方法,其特征在于：所述旧桥机拆卸方法的步骤如下：拆除旧桥机中卷筒两端的连接部件,使卷筒经其两端的转轴置于厂房两侧的旧桥机大梁顶面上；从厂房两侧旧桥机大梁的内侧、由上而下逐渐在旧桥机大梁内侧切割形成竖直且连通旧桥机大梁顶面的缺口槽,卷筒经其两端的转轴支撑于缺口槽槽底；在卷筒顶部切割形成两个进入孔。本发明适用于厂房桥机更新工程。(The invention relates to a bridge crane dismounting and mounting construction method in a plant bridge crane updating project. The invention aims to provide a bridge crane dismounting and mounting construction method in a plant bridge crane updating project, which has the advantages of simple flow, convenient operation, safety, reliability and lower cost. The technical scheme of the invention is as follows: a bridge crane dismounting and mounting construction method in plant bridge crane updating engineering comprises an old bridge crane dismounting method and a new bridge crane mounting method, and is characterized in that: the method for disassembling the old bridge crane comprises the following steps: dismantling connecting parts at two ends of a winding drum in the old bridge crane to enable the winding drum to be arranged on the top surfaces of the large beams of the old bridge crane at two sides of the factory building through rotating shafts at two ends of the winding drum; gradually cutting the inner sides of the old bridge girder from top to bottom from the inner sides of the old bridge girder at two sides of the factory building to form a vertical gap groove communicated with the top surface of the old bridge girder, and supporting the winding drum at the bottom of the gap groove through rotating shafts at two ends of the winding drum; two access holes are cut into the top of the roll. The invention is suitable for plant bridge crane updating engineering.)

1. A bridge crane dismounting and mounting construction method in plant bridge crane updating engineering comprises an old bridge crane dismounting method and a new bridge crane mounting method, and is characterized in that:

the method for disassembling the old bridge crane comprises the following steps:

dismantling connecting parts at two ends of a winding drum (1) in the old bridge crane, and enabling the winding drum (1) to be arranged on the top surfaces of girders (3) of the old bridge crane at two sides of a factory building through rotating shafts (2) at two ends of the winding drum;

the inner sides of the old bridge machine girders (3) on two sides of the factory building are gradually cut on the inner sides of the old bridge machine girders (3) from top to bottom to form a vertical gap groove (6) communicated with the top surface of the old bridge machine girders (3), and the winding drum (1) is supported at the bottom of the gap groove (6) through rotating shafts (2) on two ends of the winding drum;

cutting and forming two inlet holes (101) at the top of the winding drum (1);

a lifting lug mechanism (5) corresponding to the position of the inlet hole (101) is arranged at the bottom of the inner wall of the winding drum (1) through the inlet hole (101);

extending the suspension arms (701) of the two truck cranes (7) to the area between the reel (1) and the roof of the workshop;

a hook (702) on a suspension arm (701) of a truck crane (7) enters the interior of a reel (1) through an inlet hole (101) and then hooks a corresponding lifting lug mechanism (5);

the winding drum (1) is slowly hoisted through the lifting hook (702), so that the winding drum (1) is separated from the girder (3) of the old bridge crane and is descended to the ground after rotating for a certain angle;

then dismantling the girder (3) of the old bridge crane;

the new bridge crane installation method comprises the following steps:

installing a track of the new bridge crane on a girder of the new bridge crane;

hoisting the girders of the new bridge crane provided with the tracks at a certain height on two sides of the factory building, and ensuring that the distance between the girders of the new bridge crane on the two sides of the factory building is larger than the width of a bridge crane trolley (8) of the new bridge crane;

hoisting a cross beam for connecting the girders of the new bridge crane on two sides, and connecting and fixing one end of the cross beam with the girder of the new bridge crane on one side;

temporary lifting lugs (9) are welded on end beams (801) at the front end and the rear end of a bridge crane trolley (8), and a trolley lifting appliance (10) is installed through the temporary lifting lugs (9); the trolley lifting appliance (10) is provided with a lifting beam (1001) parallel to a trolley end beam (801) of the bridge crane, a switching lifting lug (11) which is in adaptive connection with the temporary lifting lug (9) is arranged above the lifting beam (1001), and a lifting lug mechanism (5) is arranged below the lifting beam (1001);

the bridge crane trolley (8) is lifted by two truck cranes (7) through a lifting lug mechanism (5) on a trolley lifting appliance (10);

after the trolley (8) of the bridge girder erection machine is hung to a track on the girder of the new bridge girder erection machine, the distance between the girders of the new bridge girder erection machine on two sides is adjusted and reduced, and the other end of the crossbeam is connected and fixed with the girder of the new bridge girder erection machine on the other side;

and (3) lowering the bridge crane trolley (8) to enable wheels on the bridge crane trolley (8) to fall on the track on the girder of the new bridge crane.

Technical Field

The invention relates to a bridge crane dismounting and mounting construction method in a plant bridge crane updating project. The method is suitable for plant bridge crane updating engineering.

Background

With the rapid development of the scientific and technical level, the operation requirements on hydropower station equipment are gradually improved, and hydropower station equipment built in early China is updated and modified year by year. The main building bridge crane of the hydropower station is important hoisting equipment of the hydropower station, bears the burden of unit maintenance and hoisting, and is directly related to the benefit and the safety of the hydropower station.

The bridge crane of the early hydropower station factory building of our country all adopts chinese style or threo formula dolly design, and overall dimension is big, and is very little with the space of factory building roof, if adopt traditional hoist and mount technology when the bridge crane updates, in order to satisfy the handling space, need lift partial factory building roof, seriously influence the time limit for a project of transformation of updating, the cost also can increase substantially, overhauls and maintains the serious influence that produces to the annual unit in power station to probably influence the safe operation in power station.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: aiming at the problems, the bridge crane dismounting and mounting construction method in the plant bridge crane updating project is simple in process, convenient to operate, safe, reliable and low in cost.

The technical scheme adopted by the invention is as follows: a bridge crane dismounting and mounting construction method in plant bridge crane updating engineering comprises an old bridge crane dismounting method and a new bridge crane mounting method, and is characterized in that:

the method for disassembling the old bridge crane comprises the following steps:

dismantling connecting parts at two ends of a winding drum in the old bridge crane to enable the winding drum to be arranged on the top surfaces of the large beams of the old bridge crane at two sides of the factory building through rotating shafts at two ends of the winding drum;

gradually cutting the inner sides of the old bridge girder from top to bottom from the inner sides of the old bridge girder at two sides of the factory building to form a vertical gap groove communicated with the top surface of the old bridge girder, and supporting the winding drum at the bottom of the gap groove through rotating shafts at two ends of the winding drum;

cutting two inlet holes at the top of the winding drum;

a lifting lug mechanism corresponding to the position of the inlet hole is arranged at the bottom of the inner wall of the winding drum through the inlet hole;

extending the suspension arms of the two truck cranes to the area between the winding drum and the roof of the workshop;

a lifting hook on a truck crane boom enters the interior of the drum through the inlet hole and then hooks a corresponding lifting lug mechanism;

the winding drum is slowly hoisted through the lifting hook, so that the winding drum is separated from the girder of the old bridge crane and descends to the ground after rotating for a certain angle;

then dismantling the girder of the old bridge crane;

the new bridge crane installation method comprises the following steps:

installing a track of the new bridge crane on a girder of the new bridge crane;

hoisting the girders of the new bridge crane provided with the tracks at a certain height on two sides of the factory building, and ensuring that the distance between the girders of the new bridge crane on the two sides of the factory building is larger than the width of the trolley of the new bridge crane;

hoisting a cross beam for connecting the girders of the new bridge crane on two sides, and connecting and fixing one end of the cross beam with the girder of the new bridge crane on one side;

temporary lifting lugs are welded on end beams at the front end and the rear end of the bridge crane trolley, a trolley lifting appliance is installed through the temporary lifting lugs, the trolley lifting appliance is provided with a lifting beam parallel to the bridge crane trolley end beam, a switching lifting lug for being in adaptive connection with the temporary lifting lug is arranged above the lifting beam, and a lifting lug mechanism is arranged below the lifting beam;

lifting the bridge crane trolley through a lifting lug mechanism on a trolley lifting appliance by two truck cranes;

after the trolley of the bridge girder erection machine is hung to a track higher than the girder of the new bridge girder erection machine, the distance between the girders of the new bridge girder erection machine on two sides is adjusted and reduced, and the other end of the beam is connected and fixed with the girder of the new bridge girder erection machine on the other side;

and lowering the bridge crane trolley to enable wheels on the bridge crane trolley to fall on the track on the girder of the new bridge crane.

The invention has the beneficial effects that: according to the invention, the gap groove is formed in the inner side of the girder of the old bridge crane, and the two ends of the winding drum are supported in the gap groove, so that the elevation of the winding drum is reduced, and the operation space from the upper part of the winding drum to the top of a factory building is increased. According to the invention, the lifting lug mechanism connected with the truck crane lifting hook is arranged at the bottom of the inner wall of the winding drum, so that the internal space of the winding drum is fully utilized. The invention provides sufficient operation space for hoisting the winding drum by reducing the elevation of the winding drum and fully utilizing the internal space of the winding drum, does not need to damage the roof of a factory building, and has the advantages of safety, reliability, cost saving, simple flow, time saving, labor saving and convenient operation.

Drawings

Fig. 1 and fig. 2 are schematic structural diagrams of the removing step in this embodiment.

Fig. 3 is an enlarged view of a portion a of fig. 2.

Fig. 4 is a schematic structural view of the front and rear ends of the bridge crane trolley with the trolley lifting tool installed in the embodiment.

Fig. 5 is a schematic structural diagram of the trolley spreader in the embodiment.

Detailed Description

The embodiment is a bridge crane dismounting and mounting construction method in a plant bridge crane updating project, and comprises an old bridge crane dismounting method and a new bridge crane mounting method.

As shown in fig. 1 and fig. 2, the method for disassembling the old bridge crane in this embodiment includes the following steps:

disassembling and hoisting the main hoisting outsourcing part and the connecting parts at two ends of the winding drum 1, so that the winding drum 1 is supported on the top surface of a girder 3 of the old bridge crane through rotating shafts 2 at two ends of the winding drum; at the moment, the winding drum 1 needs to be fixed by a fixing piece, so that the winding drum 1 is prevented from rolling on the girder 3 of the old bridge crane to influence safety;

gradually cutting the inner sides of the old bridge girder 3 from top to bottom from the inner sides of the old bridge girder 3 at two sides of the factory building to form a vertical gap groove 6 (see fig. 3) communicated with the top surface of the old bridge girder 3, supporting the winding drum 1 at the bottom of the gap groove 6 through rotating shafts 2 at two ends of the winding drum 1, and gradually reducing the elevation of the winding drum 1 along with the gradual deepening of the gap groove 6; the width of the notch groove 6 is matched with the diameter of the rotating shaft 2 at two ends of the winding drum 1, and the depth of the notch groove 6 is measured and calculated according to the hoisting lift of the truck crane 7 and the roof clearance;

the rotating shafts 2 at two ends of the winding drum 1 are respectively supported at the bottoms of the notch grooves 6 on the girders 3 of the old bridge cranes at two sides of the factory building so as to reduce the elevation of the winding drum 1 and increase the operating space between the upper part of the winding drum 1 and the roof of the factory building;

two inlet holes 101 are cut in the top of the reel 1;

a lifting lug mechanism 5 corresponding to the position of the inlet hole 101 is arranged at the bottom of the inner wall of the winding drum 1 through the inlet hole 101, the lifting lug and a lifting lug shaft of the lifting lug mechanism 5 are designed according to the actual wall thickness of the winding drum 1 by measuring and calculating the weight and the gravity center of the winding drum 1, and the welding of the lifting lug needs to consider the connection convenience with a lifting hook 702 of a truck crane 7;

checking the positions of the two truck cranes 7, and extending the suspension arms 701 of the two truck cranes 7 to the operation space between the winding drum 1 and the roof of the workshop;

a hook 702 on a suspension arm 701 of the truck crane 7 hooks the corresponding lifting lug mechanism 5 after entering the interior of the reel 1 through the access hole 101;

the winding drum 1 is slowly hoisted through the lifting hook 702, so that the overall dimension of the winding drum 1 after being separated from the girder and rotating for a certain angle is smaller than the inner side distance of the girder, and the winding drum 1 is slowly descended after confirming that the winding drum 1 can not interfere with the girder of the bridge crane, so that the winding drum 1 falls to the ground;

the old bridge girder 3 is then removed.

The steps of the installation method of the new bridge crane in the embodiment are as follows:

installing a track of the new bridge crane on a girder of the new bridge crane;

hoisting the girders of the new bridge crane provided with the tracks at a certain height on two sides of the factory building, and ensuring that the distance between the girders of the new bridge crane on the two sides of the factory building is larger than the width of a bridge crane trolley 8 of the new bridge crane;

hoisting a cross beam for connecting the girder of the new bridge crane on two sides, wherein one end of the cross beam is fixedly connected with the girder of the new bridge crane on one side, and the other end of the cross beam is temporarily not connected with the girder of the new bridge crane on the other corresponding side;

as shown in fig. 4, temporary lifting lugs 9 are welded on end beams 801 at the front end and the rear end of a bridge crane trolley 8, and a trolley lifting appliance 10 is installed through the temporary lifting lugs 9; as shown in fig. 5, the trolley lifting appliance 10 is provided with a lifting beam 1001 parallel to the end beam 801 of the bridge crane trolley 8, an adapter lifting lug 11 for adaptive connection with the temporary lifting lug 9 is arranged above the lifting beam 1001, and a lifting lug mechanism 5 is arranged below the lifting beam 1001;

the bridge crane trolley 8 is lifted by two truck cranes 7 through a trolley lifting appliance 10;

after the trolley 8 of the bridge girder erection machine is hung to a track higher than the girder of the new bridge girder erection machine, the distance between the girders of the new bridge girder erection machine on two sides is adjusted and reduced, and the other end of the beam and the girder of the new bridge girder erection machine on the other side are fixed through bolts;

slowly lowering the bridge crane trolley 8 to enable wheels on the bridge crane trolley 8 to fall on a track on a girder of a new bridge crane;

the trolley spreader 10 is removed.