CN111792508A - A kind of blast furnace cooling wall split arc hoisting batch positioning device and construction method - Google Patents

Abstract

The invention provides a device for arc-dividing hoisting batch in-place of a cooling wall of a blast furnace and a construction method, belonging to the technical field of installation of the cooling wall of the blast furnace, wherein the device comprises hoisting equipment and further comprises: and the main hanging bracket is connected between the hoisting equipment and the cooling wall, and the cross section of the main hanging bracket is of an arc structure with circumference of 1/4 and is matched with the inner wall of the blast furnace. The structure improvement of main gallows is the arc structure with blast furnace inner wall adaptation, and utilizes 1/4 circumference structure can pass through the fire door without hindrance, can also guarantee effectively guaranteeing hoist and mount in-process ground security simultaneously, utilizes the arc structure can also be effectively with stave and oven installation closely more, and then effectively reduces the operation step behind stave and the coincidence of oven position, practices thrift construction cost.

Description

A kind of blast furnace cooling wall split arc hoisting batch positioning device and construction method

technical field

The invention belongs to the technical field of blast furnace cooling stave installation equipment, and in particular relates to a batch positioning device and a construction method for blast furnace cooling stave split arc hoisting.

Background technique

Blast furnace stave, as the cooling equipment in blast furnace ironmaking system, plays an extremely important role. The installation speed and accuracy of blast furnace cooling stave directly affect the production and product quality of the subsequent process.

After searching, it was found that the special lifting tool for blast furnace cooling stave replacement was disclosed in the Chinese patent with the authorization announcement number CN204324689U. Two sets of hand-pulled cat head trolleys were installed at both ends of the beam, and the hand-pulled cat head trolley was matched with the hand-pulled cat head trolley. When disassembling and assembling the cooling wall, the chain hoist realizes the axial positioning, and the hand pull cat head trolley realizes the radial positioning. After the hoist is hoisted in place at one time, use the chain block hoist and the hand pull cat head trolley to make fine adjustments to improve the efficiency. Two cooling staves are hoisted at one time, and the two cooling staves are disassembled and assembled at the same time, which shortens the time for blast furnace maintenance and saves time and effort.

However, in the above technical solution, two cooling staves can be installed at the same time due to the use of beams and hand-pulled cat head trolleys at both ends. It is difficult to operate the hand-pulled cat head trolley at both ends, and during the hoisting process, due to the specific structure of the spreader, the problem of touching the wall is prone to occur, and there is a great potential safety hazard.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a batch in-position device and a construction method for split arc hoisting of a blast furnace cooling stave, so as to effectively solve the technical problems in the background art.

In order to achieve the above purpose, the present invention provides the following technical solutions: a blast furnace cooling stave split arc hoisting batch positioning device, including hoisting equipment, and also comprising: a main hanger connected between the hoisting equipment and the cooling stave, the main hoisting device The cross section of the rack is an arc structure of 1/4 circumference and is adapted to the inner wall of the blast furnace. The structure of the main hanger is improved to an arc-shaped structure suitable for the inner wall of the blast furnace, and the 1/4 circumference structure can pass through the furnace mouth without obstacles, and at the same time, it can also ensure the safety during the hoisting process. The arc structure can also effectively install the cooling stave and the furnace wall at a closer distance, thereby effectively reducing the operation steps after the positions of the cooling stave and the furnace wall are overlapped, and saving construction costs.

As a preferred embodiment of the present invention, the main hanger includes two main frame beams, the longitudinal sections of the two main frame beams are C-shaped structures, the two main frame beams are arranged back to face, and the two main frame beams A bearing plate is fixedly connected between the main frame beams, the bottom part of the bearing plate extends to the lower part of the main hanger, and the bearing plate located under the main frame beam is provided with a hoisting hole. In order to enable the main hanger to fully carry a single or multiple cooling walls, the cross-sections of the two main frame beams are designed as C-shaped structures to improve the torsion resistance and tensile performance of the main hanger. The larger contact surface between the frame beams can effectively ensure the tensile strength.

As a preferred option of the present invention, it also includes a support frame, the support frame is fixedly connected to the bottom of the main hanger, the support frame is provided with two groups and is located at 1/4 of the length of the main hanger along the length direction, 3/4 of the length. In order to better ensure the tensile strength and torsion resistance of the main hanger, the support frame is designed, and at the same time, when the spreader is not in use, the support frame can be stably placed to avoid bump damage.

As a preferred embodiment of the present invention, a balance structure is provided on the top of the main hanger, and the balance structure is used to maintain the main hanger in a horizontal state under a non-load-bearing condition. The balance structure can effectively ensure the horizontal state of the main hanger under non-load-bearing conditions, and prevent the side deflection caused by the unbalanced force from affecting the hoisting quality.

As a preferred embodiment of the present invention, the balance structure includes two lifting lugs, and the center of the line connecting the two lifting lugs is located in the same horizontal plane as the center of gravity of the main hanger. This design can be assumed under the load-bearing condition.

As a preferred option of the present invention, the balance structure includes three lifting ears, the three lifting ears are distributed in an isosceles triangle, one of the lifting ears is located in the middle of the main hanger, and the other two lifting ears are respectively located at both ends of the main hanger. In order to realize the balance state of the main hanger under the load-bearing and non-load-bearing conditions, this design is made.

Also disclosed is a construction method for split-arc hoisting batch-in-place devices for blast furnace cooling stave, comprising the following steps:

A. First connect the hoisting equipment with the corresponding lifting lugs, and then connect the cooling wall to be hoisted with the lifting holes on the bearing plate;

B. Start the hoisting equipment to hoist the cooling stave and the main hanger into the blast furnace as a whole, and move the lifting point of the hoisting equipment to slowly move the main hanger and the cooling stave to the inner wall of the blast furnace together. The position corresponding to the inner wall of the blast furnace is fixedly connected, and then the cooling wall and the lifting hole of the bearing plate are separated;

C. Repeat steps A and B until all the cooling walls are hoisted, move the main hanger to the ground through the lifting equipment, and place the main hanger on the ground through the support frame.

Compared with the prior art, the beneficial effects of the present invention are:

1. In the present invention, the arc structure of 1/4 of the circumference of the main hanger is designed and adapted to the inner wall of the blast furnace, so that the work of positioning and installing the cooling stave on the inner wall of the furnace can be located more closely, reducing the risk of touching and improving the safety. .

2. In the present invention, the main hanger includes two main frame beams arranged opposite to each other and a bearing plate located between the main frame beams, and the C-shaped structure of the main frame beam can effectively improve the tensile capacity and torsion resistance, At the same time, it can also ensure the bearing capacity of the bearing board.

3. In the present invention, a balance structure is provided on the top of the main hanger, and the use of the balance structure can effectively ensure the horizontal state of the main hanger under non-load-bearing conditions, preventing itself from side deflection and driving the hoisting cooling stave to appear side deflection. question.

4. In the present invention, the support frame is fixed at the bottom of the main hanger, and the specific design position of the support frame can further effectively improve the tensile and torsional resistance of the main hanger, and can be placed safely under non-use conditions.

Description of drawings

The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the specification, and are used to explain the present invention together with the embodiments of the present invention, and do not constitute a limitation to the present invention. In the attached image:

Fig. 1 is the bottom view of the overall structure of the present invention;

2 is a bottom view of the overall structure of Embodiment 3 of the present invention;

Fig. 3 is the sectional view at A-A place in Fig. 2;

4 is a bottom view of the overall structure of Embodiment 4 of the present invention;

FIG. 5 is a cross-sectional view at B-B in FIG. 4 .

In the figure: 1. Main hanger; 11. Main frame beam; 12. Bearing plate; 2. Support frame; 3. Lifting lug.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Example 1

Please refer to FIGS. 1 to 3 , the present invention provides the following technical solutions: a blast furnace cooling stave sub-arc hoisting batch positioning device, including a hoisting device, and also comprising: a main hanger connected between the hoisting device and the cooling stave 1. The cross section of the main hanger 1 is an arc structure of 1/4 circumference and is adapted to the inner wall of the blast furnace. The hoisting device drives the main hanger 1 and the cooling stave connected to the main hanger 1 to move as a whole, and the cooling stave can be positioned and hoisted to the inner wall of the blast furnace at a close distance, which greatly simplifies the operation steps and reduces the risk of contact and operation. Difficulty and improve hoisting safety.

Specifically, the main hanger 1 includes two main frame beams 11. The two main frame beams 11 are both made of channel steel 20a with a length of about 9 m. The longitudinal sections of the two main frame beams 11 are C-shaped structures. The main frame beams 11 are arranged facing away from each other, and a bearing plate 12 is fixedly connected between the two main frame beams 11 , and the bearing plate 12 is made of a steel plate with a length*width*thickness of 300mm*80mm*10mm. The bottom part of the bearing plate 12 extends below the main hanger 1 , and the bearing plate 12 located under the main frame beam 11 is provided with a hanging hole with a diameter of 20 cm to connect with the corresponding cooling wall. Using the two main frame beams 11 facing each other and the design of the C-shaped cross section can greatly improve the tensile and compressive capacity of the overall structure of the main hanger 1 , and at the same time effectively ensure the bearing capacity of the bearing plate 12 .

Example 2:

As shown in FIG. 1 , on the basis of Embodiment 1, a further preferred solution further includes a support frame 2 , the support frame 2 is fixedly connected to the bottom of the two main frame beams 11 , and the support frames 2 are provided with two groups and are located in the main frame 2 respectively. The frame beam 11 is at 1/4 length and 3/4 length along the longitudinal direction. The bottoms of the two main frame beams 11 can be reinforced by using the support frame 2 to further ensure the tensile strength and torsional resistance of the main hanger 1 . Place it on the ground to avoid bump damage.

Example 3:

As shown in FIG. 2 to FIG. 3 , on the basis of Embodiment 2, a further preferred solution is that the top of the main hanger 1 is provided with a balance structure, and the balance structure is used to maintain the main hanger 1 horizontally under non-load-bearing conditions. state. The balance structure can effectively ensure the horizontal state of the main hanger 1 under non-load-bearing conditions. Only by ensuring its own level can it ensure that the side walls of the cooling stave are vertical and the top surface is horizontal, so as to effectively Ensure the precise installation of the cooling wall and ensure the quality of the hoisting.

Specifically, the balance structure includes two lifting lugs 3, and the center of the line connecting the two lifting lugs 3 is in the same vertical plane as the center of gravity of the main hanger 1, and is hoisted by using the bearing plate 12 and the lifting holes on the main hanger 1 Stable hoisting can also be achieved when the cooling stave of 1/4 of the layer is installed at one time, or the center of gravity of the hoisted cooling stave and the center of the connection between the two lifting lugs 3 are located in the same horizontal plane.

Example 4:

As shown in FIG. 4 and FIG. 5 , the difference from Embodiment 3 is that the balance structure includes three lifting lugs 3 , the three lifting lugs 3 are distributed in an isosceles triangle, one lifting lug 3 is located in the middle of the main hanger 1 , and The two lifting lugs 3 are respectively located at both ends of the main hanger 1, so that the main hanger 1 is always in a horizontal state, which can be applied to the non-overlapping work of the cooling wall center and the hoisting center under the working conditions of the second embodiment. Under this circumstance, the installation work of the cooling wall will be applicable to a wider range and the operation difficulty will be further reduced.

The working principle and use process of the present invention: first, connect the hoisting equipment to the corresponding lifting lugs 3, connect the corresponding cooling wall through the lifting holes at the bottom of the bearing plate 12, start the lifting equipment to hoist the cooling wall and the main hanger 1 as a whole To the inside of the blast furnace, the main hanger 1 and the cooling stave are brought close to the inner wall of the boiler by adjusting the position of the lifting point of the hoisting equipment, and then the cooling stave is installed at the designed position on the inner wall of the blast furnace. The whole process is simple in operation and simple in structure, which is conducive to popularization . When not needed, the main hanger 1 needs to be placed upright, and the support frame 2 at the bottom enables the main hanger 1 to be placed on the ground stably.

Example 5:

A construction method for a blast furnace cooling wall split arc hoisting batch in-position device, comprising the following steps:

A. First, connect the hoisting equipment with the corresponding lifting lugs 3, and then connect the cooling wall to be hoisted with the lifting holes on the bearing plate 12;

B. Start the hoisting equipment to hoist the cooling stave and the main hanger 1 into the blast furnace as a whole, and move the lifting point of the hoisting equipment to slowly move the main hanger 1 and the cooling stave to the inner wall of the blast furnace together, through the connection on the cooling stave The parts are fixedly connected with the corresponding positions of the inner wall of the blast furnace, and then the cooling wall is separated from the lifting holes of the bearing plate 12;

C. Repeat steps A and B until all cooling staves are hoisted, move the main hanger 1 to the ground through the hoisting equipment, and place the main hanger 1 flat on the ground through the support frame 2 .

Finally, it should be noted that the above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it is still The technical solutions described in the foregoing embodiments may be modified, or some technical features thereof may be equivalently replaced. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (7)

1. A blast furnace cooling stave sub-arc hoisting batch in-position device, comprising a hoisting device, characterized in that it also comprises: a main hanger (1) connected between the hoisting device and the cooling stave, the main hanger (1) ) has an arc-shaped structure with a cross section of 1/4 circumference and is adapted to the inner wall of the blast furnace. 2. A blast furnace cooling stave split-arc hoisting batch in-position device according to claim 1, characterized in that the main hanger (1) comprises two main frame beams (11), two of the main frame The longitudinal section of the beam (11) is a C-shaped structure, the two main frame beams (11) are arranged opposite to each other, and a bearing plate (12) is fixedly connected between the two main frame beams (11). The bottom part of the bearing plate (12) extends below the main hanger (1), and the bearing plate (12) located under the main frame beam (11) is provided with a lifting hole. 3. A blast furnace cooling stave sub-arc hoisting batch in-position device according to claim 2, characterized in that, further comprising a support frame (2), the support frame (2) being fixedly connected to the main hanger (1) The bottom of the support frame (2) is provided with two groups and is located at 1/4 length and 3/4 length of the main hanger (1). 4. A blast furnace cooling stave split-arc hoisting batch positioning device according to claim 3, characterized in that, a balance structure is provided on the top of the main hanger (1), and the balance structure is used to maintain the The main hanger (1) under the load-bearing condition is in a horizontal state. 5. A blast furnace cooling stave split-arc hoisting batch positioning device according to claim 4, characterized in that the balance structure comprises two lifting lugs (3) connected with the hoisting equipment, and the two lifting lugs (3) The center of the connecting line and the center of gravity of the main hanger (1) are located in the same vertical plane. 6. A blast furnace cooling stave split-arc hoisting batch positioning device according to claim 4, characterized in that the balance structure comprises three lifting lugs (3) connected with the hoisting equipment, and the three lifting lugs (3) Distributed in an isosceles triangle, one of the lifting lugs (3) is located in the middle of the main hanger (1), and the other two lifting lugs (3) are located at both ends of the main hanger (1). 7. the construction method of a kind of blast furnace cooling stave sub-arc hoisting batch in-position device according to claim 5 or 6, is characterized in that, comprises the following steps: A. First, connect the hoisting equipment with the corresponding lifting lugs (3), and then connect the cooling wall to be hoisted with the lifting holes on the bearing plate (12); B. Start the hoisting equipment to hoist the cooling stave and the main hanger (1) into the blast furnace as a whole, and move the lifting point position of the hoisting equipment to slowly move the main hanger (1) and the cooling stave to the inner wall of the blast furnace together. The connecting piece on the wall is fixedly connected with the position corresponding to the inner wall of the blast furnace, and then the cooling wall is separated from the hanging hole of the bearing plate (12); C. Repeat steps A and B until all cooling staves are hoisted, move the main hanger (1) to the ground through the hoisting equipment, and place the main hanger (1) flat on the ground through the support frame (2).

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