WO2013013525A1

WO2013013525A1 - Device and method for dismounting agd pipe of reduction furnace

Info

Publication number: WO2013013525A1
Application number: PCT/CN2012/074880
Authority: WO
Inventors: 张东华; 刘洪亮; 陈文进; 樊少岩; 赵增富; 张磊; 杨涛; 姚剑
Original assignee: 上海宝冶集团有限公司
Priority date: 2011-07-27
Filing date: 2012-04-28
Publication date: 2013-01-31
Also published as: CN202639759U; CN202640257U; CN202639760U; ZA201308699B; CN202639761U; CN202639805U

Abstract

A device and a method for dismounting an AGD pipe of a reduction furnace. The dismounting device comprises: steel platforms disposed at two sides of an AGD pipe mounting location of a reduction furnace; a pipe sliding device disposed on the steel platform close to one side of the reduction furnace and comprising a frame-type bracket body (2), a moving jacking device (4), a fixed jacking device (3), a front disassembling bracket (1), and a rear disassembling bracket being disposed on the bracket body; and a swinging telescopic arm (5) disposed on the steel platform at the other side of the reduction furnace and facing a mounting hole of an AGD pipe of the reduction furnace. The AGD pipe is mounted through alternating jacking of the moving jacking device (4) and the fixed jacking device (3) and dragging of the swinging telescopic arm (5). The entire dismounting process is performed rapidly and efficiently outside a furnace body, thereby avoiding and reducing lots of lifting, driving, protection and construction measures. Therefore, the dismounting and maintenance are convenient.

Description

Specification reduction furnace AGD pipe disassembly device and disassembly method

Technical field

The present invention relates to maintenance of a reduction furnace. In particular, the present invention relates to a maintenance apparatus for a reduction furnace AGD pipeline; on the other hand, the present invention also designs a method for maintenance of a reduction furnace AGD pipeline.

Background technique

AGD pipe, an abbreviation for Areal Gas Distribution, ie gas area distribution. The AGD pipeline (two pieces per furnace) has a total length of more than ten meters, a net weight of several tens of tons, and a maximum outer diameter of more than 1500mm.

Since the AGD pipe needs to be installed in the middle of the C0REX furnace, it should be installed on the furnace frame +54. 8m platform. Through the reserved flange holes on both sides of the C0REX furnace, the whole furnace body should be penetrated. After the traversing is completed, the AGD pipe should be lifted up by lOOmm, the "long-distance bearing block" should be inserted into the bearing position, and then the AGD pipe should be dropped until it reaches the exact position and stays in the predetermined bearing. If you use the traditional installation method, the construction work is extremely difficult and has the following drawbacks:

(1) The installation position of the AGD pipeline is in the middle of the C0REX furnace. During the pipe-passing process, it must be operated in the furnace. A large number of lifting and protection measures must be set up inside the furnace body, and there are major construction safety hazards.

(2) AGD pipeline installation operations need to be carried out synchronously inside and outside the furnace. It is difficult to coordinate construction and unified command. AGD pipelines are easily damaged during installation.

(3) The long operation time of AGD pipeline installation and construction is not conducive to the on-line installation of C0REX furnace and the maintenance and repair of AGD pipeline during normal production.

Summary of the invention

The present invention is directed to solving the above drawbacks, and provides a reduction furnace AGD pipe disassembly apparatus and a disassembly method. The device of the invention has sufficient strength and rigidity to make the disassembly and assembly process effectively and quickly outside the furnace body, avoiding and reducing a large number of lifting, driving, protection and construction measures, and satisfying the disassembly and repair of the normal production of the AGD pipe. Convenient functional requirements.

In order to solve the above problems, a reduction furnace AGD pipe dismounting device comprises a steel platform disposed on both sides of an AGD pipe installation position of the reduction furnace, which comprises: disposed on the steel platform:

a pipe slip device disposed adjacent to one side of the reduction furnace and comprising a frame type bracket body, the bracket body is provided with a moving jacking device, a fixed jacking device, and a front dismounting bracket and a rear Disassemble the bracket;

An oscillating telescopic arm is disposed on the other side of the reduction furnace, and the oscillating telescopic arm body faces the mounting hole of the reduction furnace AGD pipe.

The reduction furnace AGD pipe dismounting device, the frame type bracket body comprises a near furnace section, a connecting section and a far furnace end, the near furnace end section is connected by a bolt flange connection section, and the far furnace section is hinged by the pin shaft in the connecting section The upper side of the frame bracket body is mounted with two parallel roller-type heavy-duty linear guides that extend longitudinally through the entire bracket.

The reduction furnace AGD pipe dismounting device is mounted on the frame type bracket body and comprises a support base, and each of the four corners is provided with a jacking cylinder, and the top of the jacking cylinder body is connected to the side A web with a roller moves along a linear guide on the frame bracket body.

The reduction furnace AGD pipe dismounting device is mounted on the frame bracket body and includes a support base, and each of the four corners is provided with a jacking cylinder fixed on the frame bracket body .

The reduction furnace AGD pipe dismounting device, the base of the front disassembly bracket spans two rails on the frame bracket body through six linear guide sliders, and includes a fixed base The pipe support arm supported by the hydraulic cylinder on the seat.

The reduction furnace AGD pipe dismounting device further comprises a rear disassembly bracket used by the ADG pipe in position, the upper surface of the rear disassembly bracket is a flange structure, and the tail has a circular arc-shaped guide plate, the guide plate A roller is provided under the rolling connection with the track.

The reduction furnace AGD pipe dismounting device is a sleeve type box body comprising a fixed section and a moving section, wherein a fixed section is hingedly fixed on the steel platform, and the end of the moving section is oscillated The cylinder is hinged to the AGD pipe, and the moving section and the built-in type are double-acting multi-stage telescopic cylinders in the movable section of the fixed end.

A method of disassembling a reduction furnace pipe using the disassembly apparatus according to any one of claims 1 to 7, characterized in that it comprises:

Step 1: Installation steps of the AGD pipe disassembly device: Install the disassembly device in the first AGD pipe installation position according to the mechanical drawings, align and level; install electrical equipment according to electrical drawings; install hydraulic equipment according to hydraulic drawings and Piping; Step 2: Rotate the frame bracket at the far furnace end by 90 degrees to prepare to lift the AGD tube. Step 3: Install the rear disassembly bracket device to the front end of the AGD tube, completely lift the AGD tube above the rail, and frame the far furnace end. Rotate the bracket back to the original position and connect; lay the AGD tube flat on the rail; install the front disassembly bracket device to the tail of the AGD tube;

Step 4, the fixed jacking device raises and supports the front end of the AGD tube, removes the rear disassembly bracket device, replaces the intermediate flange, and the hydraulic telescopic arm protrudes, and connects the telescopic arm trunnion and the intermediate flange trunnion;

Step 5, according to the program hydraulic telescopic arm pulls the AGD tube, the pull is divided into 9 times, each time, each time the fixed lifting device supports the AGD tube, the moving jacking device is lowered, manually retracted, and then the moving jacking device Supporting the AGD tube, the fixed jacking device is lowered, which facilitates the lower or secondary pulling. Before the 8th pulling, the fixed jacking device is removed, and before the 9th pulling, the moving jacking device is removed;

Step 6. The front demolition bracket device hydraulic cylinder and the telescopic arm adjustment hydraulic cylinder are raised at the same time, the AGD tube is raised, placed in the AGD tube bearing seat, the front disassembly bracket device hydraulic cylinder and the telescopic arm adjustment hydraulic cylinder are simultaneously lowered, Place the AGD tube on the bearing housing, remove the connection between the front disassembly bracket device and the AGD tube, remove the connection between the intermediate flange and the telescopic arm and the AGD tube, and complete the installation of an AGD tube; Step 7, the hydraulic telescopic arm, front Remove the bracket device, the moving jacking device, the fixed jacking device, etc. from position 1, and install it to the second AGD pipe installation position, and then install another AGD pipe according to steps 2 to 6 above.

The disassembly device of the invention is convenient to operate, detachable, reusable, practical, safe and reliable. The telescopic arm can actively drive the AGD tube into and out, without additional drive control and manual interference. The pressure circuit and pressure gauge are provided in each circuit of the hydraulic system, and the pressure of the system can be detected and monitored at any time. Each working cylinder has a built-in burst. The valve is equipped with a zero-leakage safety overload protection valve. With the absolute encoder as the stepping quantity, the relevant pressure and position data are stored in the PLC by programming, which can be conveniently observed and operated on the touch screen at any time. Adjust the entire disassembly process of the AGD tube to ensure the safety of the assembly and disassembly process of the AGD tube. The method solves the disassembly and assembly problem of the AGD pipeline of the C0REX furnace, and can safely, smoothly, reliably, accurately and efficiently perform the assembly and disassembly work of the AGD tube.

The disassembly and assembly method of the invention satisfies the construction requirements of the whole process of disassembly and assembly of the AGD tube in the furnace, realizes the safe, stable, reliable, accurate and efficient construction target of the AGD tube, and can realize the AGD in the online disassembly and assembly shaft furnace. pipeline. The invention shortens the disassembly and assembly time by more than the conventional method, and greatly reduces the construction measures and reduces the construction safety risk. DRAWINGS

Hereinafter, the present invention will be further described with reference to the accompanying drawings:

Figure 1 is a schematic view of the present invention;

2 is a schematic view of the frame type bracket;

Figure 3 is a schematic view of the rear disassembly bracket device;

Figure 4 is a schematic view of the front disassembly bracket device;

Figure 5 is a schematic view of a moving, fixed jacking device;

Figure 6 is a schematic view of the swinging telescopic boom and the base.

detailed description

As shown in Fig. 1, a reduction furnace AGD pipe disassembly device comprises a steel platform disposed on both sides of an AGD pipe installation position of the reduction furnace, which comprises: disposed on the steel platform:

The disassembly and disassembly device is disposed close to the side of the reduction furnace and comprises a frame type bracket body 2, wherein the bracket body 2 is provided with a moving jacking device 4, a fixed jacking device 3, and a front dismounting bracket. The telescopic arm 5 is disposed on the other side of the reduction furnace, and the oscillating telescopic arm body faces the mounting hole of the reduction furnace AGD pipe.

1 Disassembly and disassembly device

The disassembly and disassembly device is composed of a frame type bracket body 2, a moving jacking device 4, a fixed jacking device 3, a front dismounting bracket device 1, a rear dismounting bracket device (not shown in Fig. 1), and the like.

1. 1 frame bracket body and front and rear disassembly bracket device

Due to factors such as on-site working conditions, the frame-type bracket body 2 (see Fig. 2) is divided into three sections, which are made of ordinary carbon steel and steel. The two ends of the furnace end are connected by bolt flanges, and the far end of the furnace is hingedly connected to the second section. When the AGD tube needs to enter and exit from the tapping field, the far end of the furnace can be rotated around the side pin to allow Out of the AGD tube outlet field to the nozzle channel.

The upper surface of the bracket body 2 is a flange structure, and the tail portion has a circular arc-shaped guide plate 6. The rear-mounted detaching bracket device 7 (see Fig. 3) is used to guide the vertically hoisted AGD tube along the arc. The slippage falls to the horizontal position, and the AGD tube is placed on the stent body 2 in the longitudinal direction.

In addition, two parallel roller-type heavy-duty linear guides longitudinally penetrating the entire bracket are mounted on the inner side of the upper body of the bracket body 2, and the front dismounting bracket device 1 (see Fig. 4) is slid through six linear guide rails. The block 13 spans the two guide rails, and the built-in hydraulic cylinder 11 supports one end of the AGD tube, and cooperates with the jacking device 12 to realize the horizontal movement of the AGD tube into and out of the shaft furnace along the linear guide rail under the traction of the disassembly and disassembly arm.

1. 2 mobile jacking device 4. fixed jacking device 3

Since the surface of the AGD tube has refractory material and cannot be directly attached to the surface of the AGD tube, the movement of the AGD tube must be carried out in and out of the shaft furnace in steps. To this end, on the near furnace side of the bracket body 2, a set of moving jacking device 4 and a set of fixed jacking device 3 are provided, so that the two sets of jacking devices are alternately placed in a suitable position on the skirt legs of the AGD tube. The moving jacking device 4 supports the longitudinal horizontal movement on the flange of the middle portion of the bracket body 2 through the four rollers 41 at the bottom, and the hand can be pushed when no-load; the fixed jacking device 3 is very similar to the moving jacking device 4, only The difference is that it does not need to be moved and can be directly fixed on the bracket body 2. Considering the factors of design, manufacture, installation, cost, etc., we have made two sets of the same jacking device (see Figure 5).

The two sets of jacking devices are divided into two layers, the lower layer is the main support body with rollers 41, and four synchronous jacking cylinders 42 are built in; the upper layer is a porous (weight-reducing) light steel support 43, which can be disassembled by manpower. Handling. When the upper layer of the moving jacking device and the fixed jacking device are removed, both the front dismounting bracket device and the rear dismounting bracket device can pass over the moving top bracket.

2 swinging telescopic arm (referred to as "retractable arm")

The so-called oscillating telescopic boom 5 (see Fig. 6) refers to a telescopic boom 套筒 sleeve type box body, a fixed hinge 51 is used for the middle part of the non-moving section, and a swinging cylinder hinge 52 is used for the forward end portion. In the moving section, the overhanging head is hinged 53, and the built-in double-acting multi-stage telescopic cylinder drives the "stretching" and "retracting" of the telescopic arm, and the swing is controlled by the swinging hydraulic cylinder. This structure is very similar to the boom of a crane.

A reduction furnace pipe disassembly method using the disassembly device, which comprises:

Step 1: Installation steps of the AGD pipe disassembly device: Install the disassembly device in the first AGD pipe installation position according to the mechanical drawings, align and level; install electrical equipment according to electrical drawings; install hydraulic equipment according to hydraulic drawings and Piping;

Step 2: Rotate the frame bracket at the far furnace end by 90 degrees to prepare to lift the AGD tube. Step 3: Install the rear disassembly bracket device to the front end of the AGD tube, completely lift the AGD tube above the rail, and frame the far furnace end. Rotate the bracket back to the original position and connect; lay the AGD tube flat on the rail; install the front disassembly bracket device to the tail of the AGD tube; Step 4, the fixed jacking device is raised to support the front end of the AGD tube, the rear disassembly bracket device is removed, the intermediate flange is replaced, the hydraulic telescopic arm is extended, and the telescopic arm trunnion and the intermediate flange trunnion are coupled;

Claims

Rights request

A reduction furnace AGD pipe disassembly apparatus comprising a steel platform disposed on both sides of an AGD pipe installation position of a reduction furnace, characterized in that it comprises: a steel platform:

a pipe slip device disposed adjacent to the side of the reduction furnace and comprising a frame type bracket body, wherein the bracket body is provided with a moving jacking device, a fixed jacking device, and a front dismounting bracket and a rear dismounting bracket;

2. The reduction furnace AGD pipe dismounting device according to claim 1, wherein the frame type bracket body comprises a near furnace section, a connecting section and a distal furnace end, and the near furnace section is connected by a bolt flange connection section, far The furnace section is hinged to the connecting section by a pin shaft; the upper side of the upper side of the frame bracket body is mounted with two parallel roller-type heavy-duty linear guides extending longitudinally through the entire bracket.

The reduction furnace AGD pipe dismounting device according to claim 1, wherein the moving jacking device is mounted on the frame bracket body and includes a support base, and each of the four corners is provided with a top The lift cylinder is connected to a side of the jack cylinder body with a connecting plate with a roller to move along the linear guide on the frame bracket body.

The reduction furnace AGD pipe dismounting device according to claim 1, wherein the fixed jacking device is mounted on the frame bracket body and includes a support base, and each of the four corners is provided with a fixing Jacking cylinder on the frame bracket body.

The reduction furnace AGD pipe dismounting device according to claim 1, wherein the base of the front disassembly bracket spans two of the frame bracket bodies through six linear guide sliders On the rail, and including a pipe support arm supported by a hydraulic cylinder fixed to the base.

The reduction furnace AGD pipe dismounting device according to claim 1, further comprising a rear disassembly bracket for use in position of the ADG pipe, the upper surface of the rear disassembly bracket being a flange structure, a tail portion There is a circular arc-shaped guide plate, and a roller connected to the track is provided under the guide plate.

The reduction furnace AGD pipe dismounting device according to claim 1, wherein the swinging telescopic arm is a sleeve type box body including a fixed section and a moving section, and the fixing section is hingedly fixed to the steel in the middle On the platform, the end of the moving section is hinged with an AGD pipe, and the moving section and the Tibetan A built-in double-acting multi-stage telescopic cylinder drive connection in the fixed section of the motion section.

A method of disassembling a reduction furnace pipe according to the disassembly apparatus according to any one of claims 1 to 7, characterized in that it comprises:

Step 2: Rotate the frame bracket at the far furnace end by 90 degrees to prepare to lift the AGD tube. Step 3: Install the rear disassembly bracket device to the front end of the AGD tube, completely lift the AGD tube above the rail, and frame the far furnace end. Rotate the bracket back to the original position and connect; lay the AGD tube flat on the rail; install the front disassembly bracket device to the tail of the AGD tube;