阅读说明：本技术 液压提升吊装尿素合成塔的方法 (Method for hoisting urea synthesizing tower by hydraulic lifting ) 是由 檀贵兵 董军 张荣泰 张建月 樊东强 高伟 于 2021-09-15 设计创作，主要内容包括：本发明涉及液压提升吊装尿素合成塔的方法,在结构框架顶部设置液压提升器；结构框架底部地面设置轨道,并在轨道上安装移动支撑平台；将尿素合成塔平卧放置在移动支撑平台的框架平台上；使移动支撑平台在轨道上平移,直至尿素合成塔的顶部移动至结构框架底部；在尿素合成塔筒体前端连接液压提升器的钢绞线,在尿素合成塔筒体后端通过钢吊绳连接龙门吊上的吊具；由液压提升器向上提升尿素合成塔,龙门吊进行溜尾,同时使框架平台继续向前移动,使尿素合成塔逐渐由平卧状态提升至竖直状态；在液压提升器作用下将尿素合成塔在结构框架内提升至安装位置,进行安装。本发明克服作业空间小的场地内溜尾吊车无法进场的缺陷,且操作过程更安全、可靠。(The invention relates to a method for hoisting a urea synthesis tower by hydraulic lifting, wherein a hydraulic lifter is arranged at the top of a structural frame; a track is arranged on the ground at the bottom of the structural frame, and a movable supporting platform is arranged on the track; horizontally placing the urea synthesizing tower on a frame platform of a movable supporting platform; translating the mobile support platform on the rail until the top of the urea synthesis tower moves to the bottom of the structural frame; the front end of the urea synthesis tower cylinder is connected with a steel strand of a hydraulic lifter, and the rear end of the urea synthesis tower cylinder is connected with a lifting appliance on a gantry crane through a steel lifting rope; lifting the urea synthesizing tower upwards by a hydraulic lifter, enabling a gantry crane to slide the tail, and simultaneously enabling the frame platform to continuously move forwards, so that the urea synthesizing tower is gradually lifted to a vertical state from a horizontal state; lifting the urea synthesis tower to an installation position in the structural frame under the action of a hydraulic lifter, and installing. The invention overcomes the defect that a tail sliding crane cannot enter a field with small operation space, and the operation process is safer and more reliable.)

1. A method for hoisting a urea synthesis tower by hydraulic lifting is characterized by comprising the following steps:

step one, arranging a hydraulic lifter at the top of a structural frame;

step two, arranging a rail on the ground at the bottom of the structural frame, and installing a movable supporting platform on the rail;

the movable supporting platform comprises a frame platform, and pulleys are arranged at the bottom of the frame platform and matched with the track; a gantry crane is fixedly arranged at one end of the frame platform;

horizontally placing the urea synthesizing tower on a frame platform of the movable supporting platform;

fourthly, enabling the movable supporting platform to translate on the track until the top of the urea synthesis tower moves to the bottom of the structural frame; the front end of the urea synthesis tower cylinder is connected with a steel strand of a hydraulic lifter, and the rear end of the urea synthesis tower cylinder is connected with a lifting appliance on a gantry crane through a steel lifting rope; lifting the urea synthesizing tower upwards by a hydraulic lifter, enabling a gantry crane to slide the tail, and simultaneously enabling the frame platform to continuously move forwards, so that the urea synthesizing tower is gradually lifted to a vertical state from a horizontal state;

and fifthly, disconnecting the steel lifting rope connected with the gantry crane in the vertical state, and lifting the urea synthesis tower to the mounting position in the structural frame under the action of the hydraulic lifter for mounting.

2. The method of claim 1, wherein: the frame platform comprises a cuboid steel frame, and a wood base plate is fixed on the top surface of the steel frame.

3. The method of claim 2, wherein: the steel frame bottom is provided with the supporting seat, the pulley is installed in the supporting seat bottom.

4. The method of claim 3, wherein: the gantry crane comprises support columns on two sides and an arm beam fixedly connected between the two support columns, an electric hoist is mounted on the arm beam, and the support columns are fixedly connected with a support seat at the bottom of the steel frame.

5. The method of claim 1, 2, 3 or 4, wherein: comprises two or more rectangular protective frames which are arranged outside the urea synthesis tower.

6. The method of claim 5, wherein: the rectangular protective frame is formed by connecting four unit frames with the same structure through bolts, any one unit frame comprises a wood frame, the inner side face of the wood frame is an arc-shaped face, and a rubber protective layer is arranged on the arc-shaped face.

7. The method according to claim 1 or 6, characterized in that: and a locking device is arranged on the pulley.

8. The method of claim 7, wherein: the middle part of the wood base plate is provided with a bearing seat, and the middle part of the bearing seat is provided with an arc-shaped groove for bearing the urea synthesizing tower.

Technical Field

The invention relates to a reactor hoisting method, in particular to a method for hoisting a urea synthesis tower by hydraulic lifting.

Background

With the vigorous development of the national chemical industry, the hoisting technology difficulty of large-scale chemical equipment is more and more increased, and the hoisting characteristics of the large-scale chemical equipment mainly include large tonnage, high hoisting height, narrow hoisting space, tight construction period and the like. In the hoisting process of urea production equipment, as the urea synthesis tower is assembled by a manufacturer on site, in order to complete the translation and hoisting of the urea synthesis tower, more than two cranes are generally required to be selected for the cooperative hoisting operation.

During forward hoisting, one crane is arranged at the head of the equipment cylinder in front, and the other crane is arranged at the tail lifting lug of the urea synthesis tower cylinder in back. After the rigging is fastened, two cranes simultaneously lift the hook, the equipment barrel is lifted away from the rotating tire, then the rotating tire is sequentially removed by using an auxiliary truck crane, 3-5 sleeper piles are laid at a preset position below the equipment barrel, a main crane slowly rotates a arm, the auxiliary crane slowly moves forward and follows, the two cranes cooperatively operate, the head of the equipment is gradually sent into the concrete main frame, the forward movement operation is stopped until a pin shaft hole of a main lifting lug is located on the central axis of the frame, the hoisting rigging is released, the crane withdraws from an operation area, and then the formal in-place hoisting construction of the urea synthesis tower barrel on the next step is prepared. The urea synthesis tower crane is installed by hydraulic lifting, two hydraulic lifters are used for lifting the equipment installation designated elevation through a lifting girder installed on a frame structure, and one crane is needed for tail sliding in the process of lifting the urea synthesis tower from a horizontal state to a vertical state.

In the hoisting method in the prior art, a plurality of cranes are needed, the occupied construction space is very large, the hoisting method is not suitable for hoisting equipment in a small space, and the problems of low safety and reliability exist in the prior art.

Disclosure of Invention

The invention aims to solve the technical problem of providing a method for hoisting a urea synthesis tower by hydraulic lifting so as to achieve the purpose of safely hoisting the urea synthesis tower in a small space.

In order to solve the technical problems, the technical scheme adopted by the invention is a method for lifting and hoisting a urea synthesis tower by hydraulic lifting, which comprises the following steps:

step one, arranging a hydraulic lifter at the top of a structural frame;

step two, arranging a rail on the ground at the bottom of the structural frame, and installing a movable supporting platform on the rail;

the movable supporting platform comprises a frame platform, and pulleys are arranged at the bottom of the frame platform and matched with the track; a gantry crane is fixedly arranged at one end of the frame platform;

horizontally placing the urea synthesizing tower on a frame platform of the movable supporting platform;

fourthly, enabling the movable supporting platform to translate on the track until the top of the urea synthesis tower moves to the bottom of the structural frame; the front end of the urea synthesis tower cylinder is connected with a steel strand of a hydraulic lifter, and the rear end of the urea synthesis tower cylinder is connected with a lifting appliance on a gantry crane through a steel lifting rope; lifting the urea synthesizing tower upwards by a hydraulic lifter, enabling a gantry crane to slide the tail, and simultaneously enabling the frame platform to continuously move forwards, so that the urea synthesizing tower is gradually lifted to a vertical state from a horizontal state;

and fifthly, disconnecting the steel lifting rope connected with the gantry crane in the vertical state, and lifting the urea synthesis tower to the mounting position in the structural frame under the action of the hydraulic lifter for mounting.

Furthermore, the frame platform comprises a cuboid steel frame, and a wood base plate is fixed on the top surface of the steel frame.

Further, the steel frame bottom is provided with the supporting seat, the pulley is installed in the supporting seat bottom.

Furthermore, the gantry crane comprises support columns on two sides and an arm beam fixedly connected between the two support columns, an electric hoist is mounted on the arm beam, and the support columns are fixedly connected with a support seat at the bottom of the steel frame.

Further, comprises two or more rectangular protective frames which are arranged outside the urea synthesis tower.

Furthermore, the rectangular protective frame is formed by connecting four unit frames with the same structure through bolts, any one unit frame comprises a wood frame, the inner side face of the wood frame is an arc-shaped face, and a rubber protective layer is arranged on the arc-shaped face.

Furthermore, a locking device is arranged on the pulley.

Furthermore, the middle part of the wood base plate is provided with a bearing seat, and the middle part of the bearing seat is provided with an arc-shaped groove for bearing the urea synthesizing tower.

Compared with the prior art, the method adopts the framework platform in the movable supporting platform to move the urea synthesizing tower, uses the gantry crane to replace the conventional tail sliding crane, and is matched with the hoisting equipment at the top of the structural framework, so that the urea synthesizing tower is gradually lifted to a vertical state from a horizontal state, the defect that the tail sliding crane cannot enter a field in a small operation space is overcome, and the operation process is safer and more reliable.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate exemplary embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.

FIG. 1 is a front view of a mobile support platform according to the present invention.

Fig. 2 is a side view of the mobile support platform of the present invention.

FIG. 3 is a reference diagram of the using state of the tower-mounted device for urea synthesis of the invention.

Fig. 4 is a schematic structural view of the protection frame.

In the figure, 1-urea synthetic tower, 2-frame platform, 3-pulley, 4-rail, 5-gantry crane, 6-structural frame, 7-hydraulic lifter, 8-steel strand, 9-steel lifting rope and 10-rectangular protective frame;

201-steel frame, 202-wood backing plate, 203-bearing seat, 204-supporting seat, 501-supporting column, 502-arm beam, 503-electric hoist, 1001-wood frame and 1002-rubber protective layer.

Detailed Description

Based on the problem that the construction space occupied by the existing method for hoisting the urea synthesis tower by hydraulic lifting is very large, the method for hoisting the urea synthesis tower by hydraulic lifting provided by the invention comprises the following steps.

Step one, arranging a hydraulic lifter 7 at the top of a structural frame 6;

step two, arranging a track 4 on the ground at the bottom of the structural frame 6, and installing a movable supporting platform on the track 4;

as shown in fig. 1 and 2, the movable support platform comprises a frame platform 2, a pulley 3 is arranged at the bottom of the frame platform 2, and the pulley 3 is matched with a track 4 laid on the ground at the bottom of the structural frame; a gantry crane 5 is fixedly arranged at one end of the frame platform 2;

horizontally placing the urea synthesizing tower 1 on a frame platform 2 of a movable supporting platform;

fourthly, enabling the movable supporting platform to translate on the track 4 until the top of the urea synthesis tower 1 moves to the bottom of the structural frame 6; the front end of the cylinder of the urea synthesizing tower 1 is connected with a steel strand 8 of a hydraulic lifter 7, and the rear end of the cylinder of the urea synthesizing tower 1 is connected with a lifting appliance on a gantry crane 5 through a steel lifting rope 9; lifting the urea synthesizing tower 1 upwards by a hydraulic lifter 7, enabling a gantry crane 5 to slide the tail, and simultaneously enabling the frame platform 2 to continuously move forwards, so that the urea synthesizing tower 1 is gradually lifted from a horizontal state to a vertical state (as shown in figure 3);

and step five, when the urea synthesis tower 1 is in a vertical state, disconnecting the steel lifting rope 9 connected with the gantry crane 5, and lifting the urea synthesis tower 1 to the installation position in the structural frame 6 under the action of the hydraulic lifter 7 for installation.

In the present embodiment, the frame platform 2 and the gantry crane 5 are pushed together to move on the rail 4 by at least one thruster separately provided. The structural frame 6 is a steel structural frame or a concrete frame for mounting the urea synthesis tower. The frame platform 2 is used for transporting the urea synthesizing tower 1 to the bottom of the structural frame 6, and the gantry crane 5 is used for sliding the tail during hoisting.

According to the method provided by the embodiment, the existing tail sliding crane is replaced by the gantry crane 5 and is matched with the hoisting equipment at the top of the structural frame, so that the urea synthesizing tower 1 is gradually lifted to the vertical state from the horizontal state, and the defect that the tail sliding crane cannot enter a field with small operation space is overcome.

As shown in fig. 2, the frame platform 2 includes a rectangular steel frame 201, and a wood pad 202 is fixed on the top surface of the steel frame 201. Steel frame 201 supports the urea synthetic tower as main load-carrying members, and the quantity of wooden bolster 202 is two or more than two, sets up bearing seat 203 in wooden bolster 202 middle part, and bearing seat 203 middle part is opened has the arc recess that is used for bearing the urea synthetic tower.

In a preferred embodiment, the bottom of the steel frame 201 is provided with a support base 204, and the pulley 3 is mounted at the bottom of the support base 204. As shown in fig. 1, the supporting seats 204 are respectively disposed at two sides of the bottom of the steel frame 201, the supporting seats 204 are made of channel steel, and the pulleys 3 are mounted by pulley brackets fixed at the bottom of the supporting seats 204.

The gantry crane 5 comprises support columns 501 on two sides and an arm beam 502 fixedly connected between the two support columns 501, an electric hoist 503 is mounted on the arm beam 502, and the support columns 501 are fixedly connected with a support base 204 at the bottom of the steel frame 201. The steel frame 201 and the gantry crane 5 are both fixedly connected with the support base 204, so that the steel frame 201 and the gantry crane 5 are connected into a whole and can move synchronously.

The urea synthesis tower hoisting device comprises two or more rectangular protective frames 10 arranged outside the urea synthesis tower, and plays a role in protecting the urea synthesis tower 1 in the transportation and hoisting processes.

Relatively specifically, as shown in fig. 4, the rectangular protective frame 10 is formed by connecting four unit frames with the same structure through bolts, any one of the unit frames includes a wood frame 1001, an inner side surface of the wood frame 1001 is an arc-shaped surface, and a rubber protective layer 1002 is disposed on the arc-shaped surface. After the urea synthesis tower 1 is installed, each unit frame is removed. The unit frames are connected by bolts, so that the assembly and disassembly of the unit frames are convenient.

When the urea synthesis tower 1 is placed on the frame platform, a locking device is arranged on the pulley in order to prevent the frame platform from moving.

The scope of the invention is not limited to the above embodiments, and various modifications and changes may be made by those skilled in the art, and any modifications, improvements and equivalents within the spirit and principle of the invention should be included in the scope of the invention.