Hydraulic power-assisted disassembly device for blast furnace

Abstract

The present invention belongs to the field of metallurgical technology, and specifically, relates to a device for disassembling a middle sleeve of a blast furnace by hydraulic power assistance, comprising a main beam, a pull rod, a reaction beam, a power assistance device and a fastening device; the main beam cooperates with a large sleeve of a blast furnace air supply system to provide an installation position; the power assistance device is connected to the main beam and contacts the reaction beam; the pull rod slidably cooperates with the main beam and the reaction beam, one end of the pull rod is provided with a towing hook for hooking the outer edge of the sleeve end of the blast furnace air supply system, and the other end is interspersed with the main beam and the reaction beam, and is connected to the fastening device. The present invention transmits mechanical action to the pull rod through the reaction beam to realize the disassembly of the middle sleeve, has a simple structure, low manufacturing cost, and is easy to use and store; using the power assistance device as a power source can effectively save manpower and working time, improve working efficiency, and effectively reduce the labor intensity of workers, and has the characteristics of good applicability, safety and reliability.

Description

Technical Field

[0001] The invention belongs to the technical field of metallurgy, and more specifically relates to a blast furnace hydraulically assisted middle sleeve disassembly device. Background Art

[0002] The air supply system of the iron-making blast furnace includes three sleeves, large, medium and small, and the ends of the three sleeves are connected in sequence. During the blast furnace ironmaking operation, the operating environment temperature is relatively high, resulting in an extremely harsh working environment for the air supply system. The sleeve must not only withstand a high temperature of 1500°C, but also withstand the erosion of high-temperature molten iron and the wear of furnace charge and slag. In the blast furnace ironmaking production, affected by the fluctuation of the blast furnace condition, the air supply system will be thermally eroded by liquid slag, and the middle sleeve will often burn out. Damage to the middle sleeve can easily lead to water leakage, affecting the normal production of the blast furnace. In severe cases, the blast furnace must be shut down.

[0003] When replacing the middle sleeve, the process is cumbersome and time-consuming, and most of the time is spent on dismantling the middle sleeve, which will cause a series of problems. On the one hand, long-term wind stoppage leads to increased heat loss of the blast furnace, poor fluidity of soft melting zone slag iron, and increased difficulty in re-blowing; on the other hand, when removing the middle sleeve, the traditional oxygen cutting method will produce a lot of thick smoke and pollute the environment. Therefore, if oxygen cutting can be avoided and the time for replacing the middle sleeve can be shortened (that is, the time for dismantling the middle sleeve can be shortened), the difficulty of re-blowing will be reduced, and time can be saved for production, relieving production pressure, and achieving environmental protection goals.

[0004] At present, there are few improvements on the devices for disassembling the middle sleeve in China. The traditional devices for disassembling the middle sleeve can be summarized as follows:

[0005] 1. Most of the tools used to dismantle the middle sleeve are single pull rods equipped with sliding hammers. The sliding hammers hit the front and rear baffles to drag the middle sleeve. The operation time is long and the labor intensity is high. People are very likely to suffer from gas poisoning and burns.

[0006] Second, the single pull rod makes the middle sleeve unevenly stressed and difficult to drag. Once it cannot be dragged, oxygen cutting is required to burn the middle sleeve with oxygen to disassemble it. At this time, a large amount of thick smoke will be generated to pollute the environment, and even cause secondary safety accidents and occupational health hazards;

[0007] 3. The sliding hammer relies on human power to slide, and the force is limited. As the physical strength of the personnel decreases, the difficulty of the operation increases. Summary of the invention

[0008] The purpose of the present invention is to address the deficiencies in the prior art and provide a special tool with a simple structure, low manufacturing cost, safety and reliability, labor-saving and quick operation, which is suitable for replacing the tuyere sleeve during blast furnace shutdown operations, and can effectively reduce the labor intensity of workers and improve operating efficiency.

[0009] In order to achieve the above object, the present invention provides the following technical solutions:

[0010] A device for hydraulically assisting the removal of a middle sleeve of a blast furnace comprises: a main beam, a pull rod, a reaction beam, a power assist device and a fastening device; the main beam cooperates with a large sleeve of a blast furnace air supply system to provide an installation position; the power assist device is connected to the main beam and contacts the reaction beam; the pull rod slidably cooperates with the main beam and the reaction beam, one end of the pull rod is provided with a towing hook for hooking the outer edge of the end of the middle sleeve of the blast furnace air supply system, and the other end is interspersed with the main beam and the reaction beam and is connected to the fastening device.

[0011] As for the above-mentioned blast furnace hydraulic assisted disassembly middle sleeve device, it is further preferred that: the pull rod is a segmented structure, including a front section rod body, a middle section rod body and a rear section rod body that are connected; the front end of the front section rod body is provided with the towing hook; the cross-section of the middle section rod body is a polygonal structure; the rear section rod body is connected to the fastening device; the main beam matches the middle section rod body; the reaction beam matches the rear section rod body.

[0012] As for the above-mentioned blast furnace hydraulic assisted disassembly middle sleeve device, it is further preferred that: the upper part of the drag hook is a right-angled trapezoid, and the lower part is a rectangle, the top edge of the right-angled trapezoid is a blade, and the thickness of the top edge is less than the thickness of the bottom edge of the rectangle; the cross-section of the middle section of the rod body is a square structure; the cross-sections of the front section of the rod body and the rear section of the rod body are circular structures.

[0013] As for the above-mentioned blast furnace hydraulic power-assisted middle sleeve disassembly device, it is further preferred that: the cross-sectional area of ​​the front rod body is larger than the cross-sectional area of ​​the middle rod body, and the cross-sectional area of ​​the middle rod body is larger than the cross-sectional area of ​​the rear rod body.

[0014] As for the above-mentioned blast furnace hydraulic power-assisted disassembly middle sleeve device, it is further preferred that: the main beam is a rectangular structure, including a first support plate, a second support plate and a first rib plate, a second rib plate, a third rib plate, and a fourth rib plate arranged in parallel; the first rib plate, the second rib plate, the third rib plate, and the fourth rib plate are connected between the first support plate and the second support plate, and are arranged perpendicular to the first support plate and the second support plate; there is a first assembly hole between the first rib plate and the second rib plate, and there is a second assembly hole between the third rib plate and the fourth rib plate; there are two pull rods, and the first assembly hole and the second assembly hole are matched with the middle section rod body respectively.

[0015] As for the above-mentioned blast furnace hydraulic power-assisting disassembly middle sleeve device, it is further preferred that: the main beam also includes a power-assisting positioning plate, the power-assisting positioning plate is installed at the bottom ends of the first support plate and the second support plate, and is respectively connected to the first rib plate, the second rib plate, the third rib plate, and the fourth rib plate; the power-assisting positioning plate is provided with a power-assisting positioning groove adapted to the power-assisting device and a through hole adapted to the first assembly hole and the second assembly hole.

[0016] As for the above-mentioned blast furnace hydraulic power-assisted disassembly middle sleeve device, it is further preferred that: the through hole is smaller than the first assembly hole and the second assembly hole, and the cross-sectional area of ​​the through hole is larger than the cross-sectional area of ​​the middle section rod body.

[0017] As for the above-mentioned blast furnace hydraulic assisted disassembly middle sleeve device, it is further preferred that: the main beam also includes a fifth rib plate and a sixth rib plate; the fifth rib plate is connected to the first support plate and the second support plate, and is located on the left side of the first rib plate; the sixth rib plate is connected to the first support plate and the second support plate, and is located on the right side of the fourth rib plate.

[0018] As for the above-mentioned blast furnace hydraulic power-assisted disassembly middle sleeve device, it is further preferred that: the first rib plate is arranged in parallel with the fifth rib plate, and the fourth rib plate is arranged in parallel with the sixth rib plate; the fifth rib plate and the sixth rib plate are respectively perpendicular to the first support plate, the second support plate, and the power-assisted positioning plate.

[0019] As for the above-mentioned blast furnace hydraulic power-assisted disassembly middle sleeve device, it is further preferred that: the reaction beam is a rectangular structure, including a third support plate, a fourth support plate, a first sleeve and a second sleeve; the first sleeve and the second sleeve are respectively connected to the third support plate and the fourth support plate; the third support plate is arranged in parallel with the fourth support plate, the axis of the first sleeve is arranged in parallel with the axis of the second sleeve, and the plane uniquely determined by the axis of the first sleeve and the axis of the second sleeve is parallel to the third support plate and the fourth support plate; the inner diameters of the first sleeve and the second sleeve are larger than the outer diameter of the rear section rod body.

[0020] As for the above-mentioned blast furnace hydraulic power-assisted disassembly middle sleeve device, it is further preferred that: the reaction beam also includes a reaction force bearing plate, the reaction force bearing plate is installed on the top of the third support plate and the fourth support plate, and is vertically arranged with the third support plate and the fourth support plate; the reaction force bearing plate is provided with a power-assisted bearing groove, and the power-assisted bearing groove is adapted to the power-assisted device.

[0021] As for the above-mentioned blast furnace hydraulic assisted disassembly middle sleeve device, it is further preferred that: the reaction beam also includes a seventh rib plate and an eighth rib plate; the seventh rib plate and the eighth rib plate are located in the area enclosed by the first sleeve, the second sleeve, the third support plate, the fourth support plate, and the reaction force bearing plate, and are respectively connected to the third support plate, the fourth support plate, and the reaction force bearing plate.

[0022] As for the above-mentioned blast furnace hydraulic power-assisted disassembly middle sleeve device, it is further preferred that: the seventh rib plate is arranged in parallel with the eighth rib plate, and is arranged perpendicular to the third support plate, the fourth support plate, and the reaction force bearing plate.

[0023] For example, the above-mentioned hydraulic power-assisted disassembly device for the middle sleeve of a blast furnace is further preferably: the power-assisted device is any one of a cylinder, a hydraulic cylinder, and a hydraulic jack.

[0024] For the above-mentioned blast furnace hydraulic power-assisted disassembly middle sleeve device, it is further preferred that: the power-assisted device is a hydraulic jack.

[0025] As for the above-mentioned blast furnace hydraulic power-assisted disassembly middle sleeve device, it is further preferred that: the fastening device and the pull rod are connected by any one of threaded connection, pin shaft connection, and clamping connection.

[0026] As for the above-mentioned blast furnace hydraulic power-assisted disassembly middle sleeve device, it is further preferred that: the fastening device is threadedly connected to the pull rod, the pull rod is provided with an external thread, and the fastening device is a nut.

[0027] The above-mentioned blast furnace hydraulic power-assisted disassembly middle sleeve device is further preferably: further comprising a displacement calibration ruler, the displacement calibration ruler is installed on the main beam, and the displacement calibration ruler is provided with a scale for calibrating the displacement of the reaction beam.

[0028] As for the above-mentioned blast furnace hydraulic assisted disassembly middle sleeve device, it is further preferred that: the displacement calibration ruler is rotatably connected to the main beam, and the main beam is provided with a first limit block and a second limit block; the first limit block and the second limit block are used to limit the displacement of the displacement calibration ruler.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] 1. The present invention includes five parts, namely a main beam, a pull rod, a reaction beam, a power assist device and a fastening device. When in use, the present invention transmits the mechanical action to the pull rod through the reaction beam to realize the disassembly of the middle sleeve. The power assist device is extended in length, exerts pressure on the main beam and the reaction beam, and the reaction beam drives the pull rod to move downward, thereby dragging the middle sleeve out of the large sleeve. The present invention has a simple structure and low manufacturing cost. The main beam, pull rod, reaction beam, power assist device and fastening device can be assembled immediately when in use, and can be kept separately during storage and transportation, which is convenient for use and storage; the power assist device is used as the power source, and two pull rods are used to apply force, so that the middle sleeve can be quickly and safely dragged out, effectively saving manpower and working time, reducing the risk of gas poisoning and the possibility of safety accidents, thereby improving working efficiency and effectively reducing the labor intensity of workers. It has the characteristics of good applicability, safety and reliability.

[0031] 2. The pull rod of the present invention has a segmented structure, and the front section, middle section and rear section are all solid steel rods; the middle section cooperates with the main beam, and the rear section cooperates with the reaction beam. The cross-sections of the front section and the rear section are circular, and the cross-section of the middle section is square, which can limit the rotation of the pull rod; the cross-sectional area of ​​the front section is larger than that of the middle section, and the cross-sectional area of ​​the middle section is larger than that of the rear section, which can limit the axial displacement of the pull rod and is safe and reliable.

[0032] 3. The main beam and reaction beam of the present invention are both rectangular structures formed of plates, which have low manufacturing cost, high structural strength, and strong bearing capacity. They can achieve the purpose of lightweight design and provide convenience for installation during operation.

[0033] 4. The present invention is also provided with a displacement calibration ruler, which can measure the displacement of the pull rod and reduce the damage to the blast furnace air supply system caused by misoperation. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0035] Figure 1 It is a connection schematic diagram of the blast furnace hydraulic power-assisted disassembly middle sleeve device of the present invention.

[0036] Figure 2 It is a schematic diagram of the use status of the blast furnace hydraulic power-assisted disassembly middle sleeve device of the present invention.

[0037] Figure 3 It is a schematic structural diagram of the pull rod of the present invention.

[0038] Figure 4 The structure of the main beam of the present invention is schematically shown in FIG. Figure 1 .

[0039] Figure 5 The structure of the main beam of the present invention is schematically shown in FIG. Figure 2 .

[0040] Figure 6 The structure of the reaction beam of the present invention is schematically shown in FIG. Figure 1 .

[0041] Figure 7 The structure of the reaction beam of the present invention is schematically shown in FIG. Figure 2 .

[0042] Figure 8 It is a schematic diagram of the installation of the displacement calibration ruler of the present invention.

[0043] Among them: 1-reaction beam; 11-third support plate; 12-reaction bearing plate; 121-power bearing groove; 13-fourth support plate; 14-first sleeve; 15-second sleeve; 16-seventh rib plate; 17-eighth rib plate; 2-power device; 3-fastening device; 4-main beam; 41-first support plate; 42-fourth rib plate; 43-power positioning plate; 431-power positioning groove; 432-through hole; 44-second rib plate; 45-second support plate; 46-fifth rib plate; 47-first rib plate; 48-third rib plate; 49-sixth rib plate; 5-pull rod; 51-tow hook; 52-front section rod body; 53-middle section rod body; 54-rear section rod body; 6-displacement calibration scale; 7-middle sleeve; 8-large sleeve; 9-shell; 10-thrust pin column. DETAILED DESCRIPTION

[0044] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments. Each example is provided by way of explanation of the present invention and does not limit the present invention. In fact, it will be clear to those skilled in the art that modifications and variations may be made in the present invention without departing from the scope or spirit of the present invention. For example, a feature shown or described as a part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desired that the present invention encompasses such modifications and variations within the scope of the appended claims and their equivalents.

[0045] In the description of the present invention, the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention. The terms "connected" and "connected" used in the present invention should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be directly connected or indirectly connected through an intermediate component. The cross-section used in the present invention refers to a plane obtained by intercepting an object along a plane perpendicular to the axis. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0046] Please refer to Figures 1 to 8 ,in, Figure 1 It is a connection schematic diagram of the blast furnace hydraulic power-assisted disassembly middle sleeve device of the present invention; Figure 2 It is a schematic diagram of the use state of the blast furnace hydraulic power-assisted disassembly middle sleeve device of the present invention; Figure 3 It is a structural schematic diagram of the pull rod of the present invention; Figure 4 The structure of the main beam of the present invention is schematically shown in FIG. Figure 1 ; Figure 5 The structure of the main beam of the present invention is schematically shown in FIG. Figure 2 ; Figure 6 The structure of the reaction beam of the present invention is schematically shown in FIG. Figure 1 ; Figure 7 The structure of the reaction beam of the present invention is schematically shown in FIG. Figure 2 ; Figure 8 It is a schematic diagram of the installation of the displacement calibration ruler of the present invention.

[0047] like Figures 1 to 3 As shown, the present invention provides a blast furnace hydraulic power-assisted disassembly middle sleeve device, which mainly includes a main beam 4, a pull rod 5, a reaction beam 1, a power-assisting device 2 and a fastening device 3; the main beam 4 cooperates with the large sleeve 8 of the blast furnace air supply system to provide an installation position; the power-assisting device 2 is connected to the main beam 4 and contacts with the reaction beam 1; the pull rod 5 slides with the main beam 4 and the reaction beam 1, one end of the pull rod 5 is provided with a towing hook 51 for hooking the outer edge of the end of the middle sleeve 7 of the blast furnace air supply system, and the other end is interspersed with the main beam 4 and the reaction beam 1, and is connected to the fastening device 3.

[0048] The present invention includes five parts, namely the main beam 4, the tie rod 5, the reaction beam 1, the assisting device 2 and the fastening device 3. When in use, the present invention transmits the mechanical action to the tie rod 5 through the reaction beam 1 to realize the disassembly of the middle sleeve 7, which can avoid environmental pollution caused by the use of oxygen cutting and other reasons during the disassembly operation, as well as the occurrence of injuries caused by the spraying of red coke and slag iron from the blast furnace. Specifically, the tie rod 5 of the present invention is two, and the two tie rods 5 are symmetrically arranged when in use, which can ensure that the force on the middle sleeve is balanced. The two tie rods 5 are placed in the middle sleeve 7 of the blast furnace air supply system, and the towing hook 51 of the tie rod 5 is hung on the outer edge of the end of the middle sleeve 7. The other end of the tie rod 5 passes through the main beam 4 and the reaction beam 1 in turn and is fixedly connected to the fastening device 3. The fastening device 3 is located below the reaction beam 1 and is against the reaction beam 1; the main beam 4 is erected on the outer edge of the large sleeve 8 of the blast furnace air supply system to fix the ejector of the middle sleeve 7 On the latch column 10, the force is transmitted to the shell 9 through the flange of the large sleeve 8 (the components of the blast furnace air supply system related to the disassembly of the middle sleeve 7 include the large sleeve 8, the ejector latch column 10 and the shell 9. The large sleeve 8 is installed on the shell 9, and the ejector latch column 10 is installed on the large sleeve 8. The main beam 4 can be installed on the ejector latch column 10 by drilling holes on the main beam 4 and by means of snap connection, thread connection, etc., which can be realized by those skilled in the art). A retractable booster device 2 is connected between the main beam 4 and the reaction beam 1. The booster device 2 is extended in length to apply pressure to the main beam 4 and the reaction beam 1. Since the main beam 4 is fixedly connected to the large sleeve 8 of the blast furnace air supply system, the main beam 4 remains in position when the booster device 2 applies pressure, and the reaction beam 1 drives the pull rod 5 to move downward, so that the pull rod 5 drags the middle sleeve 7 out of the large sleeve 8. The present invention has a simple structure and low manufacturing cost. The main beam 4, the pull rod 5, the reaction beam 1, the power assist device 2, and the fastening device 3 can be assembled immediately when in use, and can be kept separately during storage and transportation, so as to be convenient for use and storage. The power assist device 2 is adopted as a power source, and two pull rods 5 are used to apply force, so as to improve the disadvantages of uneven force on the middle sleeve 7 and high labor consumption when disassembling the middle sleeve 7 by the traditional method, and the middle sleeve 7 can be quickly and safely dragged out, so as to effectively save manpower and operation time, reduce the risk of gas poisoning and the possibility of safety accidents, thereby improving operation efficiency and effectively reducing the labor intensity of workers, and has the characteristics of good applicability, safety and reliability.

[0049] As an improvement to the present invention, Figures 1 to 8 As shown, the present invention also provides the following improved solution:

[0050] In order to further improve the safety of the present invention when used, Figure 1 and Figure 3As shown, the pull rod 5 of the present invention is a segmented structure, including a front rod body 52, a middle rod body 53 and a rear rod body 54 connected to each other; the front end of the front rod body 52 is provided with a towing hook 51; the cross section of the middle rod body 53 is a polygonal structure; the rear rod body 54 is connected to the fastening device 3; the main beam 4 matches the middle rod body 53; the reaction beam 1 matches the rear rod body 54. When the present invention is in use, the middle rod body 53 matches the main beam 4, and the rear rod body 54 matches the reaction beam 1. The middle rod body 53 is a polygonal structure rod, and when matching with the main beam 4, it can only slide relative to the main beam 4, but cannot twist along the main beam 4, so that the towing hook 51 on the front rod body 52 can be prevented from being unhooked by the middle sleeve 7, ensuring the reliability of the operation and further improving the safety of the present invention.

[0051] Furthermore, in order to save manufacturing costs, as shown in the figure, the front rod body 52 and the rear rod body 54 of the present invention are both round rods (the cross-sections of the front rod body 52 and the rear rod body 54 are circular structures), and the middle rod body 53 is a square rod (the cross-section of the middle rod body 53 is a square structure), which improves the safety of the use of the present invention while also being easy to process and manufacture.

[0052] In order to further improve the convenience of use, Figure 2 and Figure 3 As shown, the towing hook 51 is symmetrically cut with the plane where the axis of the pull rod 5 is located, the upper part of the towing hook 51 is a right-angled trapezoid, and the lower part is a rectangle, which is convenient for the pull rod 5 to enter when the pull rod 5 is inserted into the middle sleeve 7. Further, the top of the towing hook 51 of the present invention is a blade (the top edge of the right-angled trapezoid is the blade), which can further facilitate the pull rod 5 to enter the middle sleeve 7, and improve the convenience of use of the present invention; at the same time, the thickness of the top of the towing hook 51 is less than the thickness of the bottom (the thickness of the top edge is less than the thickness of the bottom edge of the rectangle), which can also ensure that the structure of the towing hook 51 is firm and reliable.

[0053] During manufacturing, the pull rod 5 of the present invention is a three-section solid steel rod, that is, the front section rod body 52, the middle section rod body 53 and the rear section rod body 54 are all solid steel rods. The towing hook 51 is machined and formed into an integrated structure with the front section rod body 52. ​​The middle section rod body 53 is a square rod, and the front section rod body 52 and the rear section rod body 54 are round rods. The front section rod body 52, the middle section rod body 53 and the rear section rod body 54 are combined into an integrated pull rod 5, which can ensure the reliability of the operation and reduce the manufacturing cost.

[0054] In order to improve the reliability of the present invention and prevent collisions during use, Figure 2 and Figure 3As shown, the cross-sectional area of ​​the front rod body 52 of the present invention is larger than the cross-sectional area of ​​the middle rod body 53, and the cross-sectional area of ​​the middle rod body 53 is larger than the cross-sectional area of ​​the rear rod body 54, that is, the circular outer contour area of ​​the front rod body 52 is larger than the square outer contour area of ​​the middle rod body 53, and the square outer contour area of ​​the middle rod body 53 is larger than the circular outer contour area of ​​the rear rod body 54. The middle rod body 53 matches the main beam 4, and the rear rod body 54 matches the reaction beam 1. Therefore, when the front rod body 52 slides to the main beam 4, it is stuck by the main beam 4 and cannot go down, or when the middle rod body 53 slides to the reaction beam 1, it is stuck by the reaction beam 1 and cannot go down. The displacement of the pull rod 5 can be limited, and the middle sleeve 7 is prevented from being pulled off by the pull rod 5, causing the pull rod 5 to slip out and injure people (preventing the pull rod 5 from sliding down too long and hitting people's feet and legs), thereby further improving the reliability of the present invention.

[0055] In order to save manufacturing costs and carry out lightweight design, such as Figure 1 and Figure 4 As shown, the main beam 4 of the present invention is a hollow rectangular parallelepiped structure, including a first support plate 41, a second support plate 45 and a first rib plate 47, a second rib plate 44, a third rib plate 48, and a fourth rib plate 42 arranged in parallel; the first rib plate 47, the second rib plate 44, the third rib plate 48, and the fourth rib plate 42 are connected between the first support plate 41 and the second support plate 45, and are arranged perpendicular to the first support plate 41 and the second support plate 45; the first assembly hole is between the first rib plate 47 and the second rib plate 44, and the second assembly hole is between the third rib plate 48 and the fourth rib plate 42; there are two tie rods 5, and the first assembly hole and the second assembly hole are matched with the middle section rod body 53 respectively. The main beam 4 of the present invention is made of plate welded, with low manufacturing cost, and the joints of the plate welds are all full welded, which can improve the structural strength of the main beam 4. When in use, the assisting device 2 is located at the bottom of the first support plate 41 and the second support plate 45, and applies force to the first support plate 41 and the second support plate 45 in a direction perpendicular to the thickness of the first support plate 41 and the second support plate 45. Such a design can improve the bearing strength of the first support plate 41 and the second support plate 45, and realize lightweight design while maximizing the bearing capacity of the main beam 4. A first assembly hole is formed between the first rib plate 47 and the second rib plate 44, and a second assembly hole is formed between the third rib plate 48 and the fourth rib plate 42 of the present invention. Both the first assembly hole and the second assembly hole are square holes, which are slidably matched with the middle rod body 53 of the pull rod 5, and can limit the rotational freedom of the pull rod 5 to prevent the pull rod 5 from slipping during operation.

[0056] In order to facilitate assembly during operation, Figure 1 , Figure 4 and Figure 5As shown, the main beam 4 of the present invention further includes a power-assisting positioning plate 43, which is fully welded to the bottom ends of the first support plate 41 and the second support plate 45, and is fully welded to the first rib plate 47, the second rib plate 44, the third rib plate 48, and the fourth rib plate 42, respectively, so as to connect the first support plate 41, the second support plate 45, the first rib plate 47, the second rib plate 44, the third rib plate 48, and the fourth rib plate 42 as a whole, thereby further improving the structural strength of the main beam 4. The power-assisting positioning plate 43 is vertically arranged with the first support plate 41, the second support plate 45, the first rib plate 47, the second rib plate 44, the third rib plate 48, and the fourth rib plate 42, and is provided with a power-assisting positioning groove 431 adapted to the power-assisting device 2, so as to improve the installation position of the power-assisting device 2 during assembly, and facilitate the installation of the power-assisting device 2 during operation.

[0057] In order to accurately constrain the displacement of the tie rod 5, Figure 1 , Figure 4 and Figure 5 As shown, the power-assisting positioning plate 43 of the present invention is also machined with a through hole 432 adapted to the first assembly hole and the second assembly hole, so as to facilitate sliding cooperation with the pull rod 5. Further, the through hole 432 of the present invention is smaller than the first assembly hole and the second assembly hole, and the cross-sectional area of ​​the through hole 432 is larger than the cross-sectional area of ​​the middle section, so that the through hole 432 can also be used to constrain the rotational freedom of the pull rod 5. When preventing the pull rod 5 from rotating, the present invention first uses the first assembly hole and the second assembly hole to constrain the displacement of the pull rod 5, which can preliminarily constrain the rotational displacement of the pull rod 5; then, the through hole 432 is used to further constrain the displacement of the pull rod 5, which can further constrain the rotation of the pull rod 5. The through hole 432 is smaller than the first assembly hole and the second assembly hole (the machining accuracy is greater than the welding accuracy), so that the pull rod 5 can be accurately constrained, and the outer contour of the through hole 432 is larger than the outer contour of the middle section rod body 53 of the pull rod 5 (the cross-sectional area of ​​the through hole 432 is larger than the cross-sectional area of ​​the middle section rod body 53), so that the smoothness of the displacement of the pull rod 5 can be ensured.

[0058] In order to further improve the structural strength of the main beam 4, as Figure 4 As shown, the main beam 4 of the present invention further includes a fifth rib plate 46 and a sixth rib plate 49; the fifth rib plate 46 is connected to the first support plate 41 and the second support plate 45, and is located on the left side of the first rib plate 47; the sixth rib plate 49 is connected to the first support plate 41 and the second support plate 45, and is located on the right side of the fourth rib plate 42. The fifth rib plate 46 of the present invention is fully welded to the first support plate 41, the second support plate 45 and the power-assisting positioning plate 43 respectively; the sixth rib plate 49 is fully welded to the first support plate 41, the second support plate 45 and the power-assisting positioning plate 43 respectively, which can further improve the connection strength between the first support plate 41 and the second support plate 45, and support the power-assisting positioning plate 43, thereby further improving the structural strength of the main beam 4.

[0059] Furthermore, the first rib plate 47 of the present invention is arranged in parallel with the fifth rib plate 46, and the fourth rib plate 42 is arranged in parallel with the sixth rib plate 49; the fifth rib plate 46 and the sixth rib plate 49 are respectively perpendicular to the first support plate 41, the second support plate 45, and the auxiliary positioning plate 43, which can save the plate materials consumed by the fifth rib plate 46 and the sixth rib plate 49 and maximize the bearing capacity of the main beam 4.

[0060] In order to realize the lightweight design of the reaction beam 1, Figure 1 and Figure 6 As shown, the reaction beam 1 of the present invention is a rectangular parallelepiped structure, including a third support plate 11, a fourth support plate 13, a first sleeve 14 and a second sleeve 15; the first sleeve 14 and the second sleeve 15 are fully welded to the third support plate 11 and the fourth support plate 13 respectively; the third support plate 11 is arranged in parallel with the fourth support plate 13, the axis of the first sleeve 14 is arranged in parallel with the axis of the second sleeve 15, and the plane uniquely determined by the axis of the first sleeve 14 and the axis of the second sleeve 15 is parallel to the third support plate 11 and the fourth support plate 13. The present invention adopts two plates and two sleeves to make the reaction beam 1, which can realize the lightweight design of the reaction beam 1, the top of the third support plate 11 and the fourth support plate 13 is connected to the booster device 2, and the booster device 2 applies force to the third support plate 11 and the fourth support plate 13 in a direction perpendicular to the thickness of the third support plate 11 and the fourth support plate 13, which can maximize the use of the bearing capacity of the reaction beam 1. The inner diameters of the first sleeve 14 and the second sleeve 15 of the present invention are larger than the outer diameter of the rear rod body 54 , so that the pull rod 5 can slide in the first sleeve 14 and the second sleeve 15 , providing a sliding guide for the pull rod 5 .

[0061] In order to facilitate the arrangement of the force application position of the power assist device 2, as shown in FIG. Figure 1 and Figure 6 As shown, the reaction beam 1 of the present invention also includes a reaction force bearing plate 12, which is fully welded to the top of the third support plate 11 and the fourth support plate 13, and is vertically arranged with the third support plate 11 and the fourth support plate 13; the reaction force bearing plate 12 is processed with a power-assisting bearing groove 121, which is adapted to the power-assisting device 2 and can provide a force-applying position for the power-assisting device 2, so as to facilitate the power-applying device 2 and prevent the occurrence of safety hazards such as the power-assisting device 2 slipping and injuring people, and at the same time can also improve the structural strength of the reaction beam 1.

[0062] In order to further improve the bearing capacity of the reaction beam 1, Figure 1 , Figure 6 and Figure 7As shown, the reaction beam 1 of the present invention also includes a seventh rib plate 16 and an eighth rib plate 17; the seventh rib plate 16 and the eighth rib plate 17 are located in the area enclosed by the first sleeve 14, the second sleeve 15, the third support plate 11, the fourth support plate 13, and the reaction bearing plate 12, and are fully welded to the third support plate 11, the fourth support plate 13, and the reaction bearing plate 12 respectively, which can further improve the bearing capacity of the reaction beam 1.

[0063] Furthermore, as shown in the figure, the seventh rib plate 16 and the eighth rib plate 17 of the present invention are both located below the auxiliary bearing groove 121, and the seventh rib plate 16 is arranged in parallel with the eighth rib plate 17, and is arranged vertically with the third support plate 11, the fourth support plate 13, and the reaction bearing plate 12, which can improve the bearing strength of the reaction beam 1 and save the plate material used for the reaction beam 1.

[0064] In order to reduce the labor intensity of workers and facilitate construction work, such as Figure 1 and Figure 2 As shown, the booster device 2 of the present invention is any one of a cylinder, a hydraulic cylinder, and a hydraulic jack, which can replace manpower and reduce the labor intensity of workers. Preferably, in order to improve the portability of the present invention, the booster device 2 of the present invention is a hydraulic jack, and the number is two, which can increase the pressure value of the booster device 2, disperse the force application points of the booster device 2 (avoid the situation where the local pressure on the main beam 4 or the reaction beam 1 is too large due to a single force application point), and improve the effectiveness of the booster device 2 (prevent the failure of the booster device 2 caused by the failure of the hydraulic jack when a single hydraulic jack is used).

[0065] In order to facilitate the fastening device 3 and the rear section rod body 54 of the pull rod 5, as shown in FIG. Figure 2 , Figure 3 and Figure 6 As shown, the fastening device 3 of the present invention and the pull rod 5 are connected by thread, pin or clamp. When in use, the fastening device 3 is fixedly connected to the rear section 54 of the pull rod 5 and clamped on the lower end surfaces of the first sleeve 14 and the second sleeve 15 of the reaction beam 1. Specifically, when the pull rod 5 and the fastening device 3 are threadedly connected, an external thread is provided on the rear section of the rod body 54, and the fastening device 3 is a nut. The outer contour of the nut is larger than the inner diameter of the first sleeve 14 and the second sleeve 15, and the pull rod 5 and the fastening device 3 can be fixedly connected through the cooperation of the nut and the external thread; when the pull rod 5 and the fastening device 3 are pin-connected, a hole is drilled on the circumferential surface of the rear section of the rod body 54, and the fastening device 3 is a pin. The pin is installed in the drill hole and clamped on the lower end surface of the first sleeve 14 and the second sleeve 15, so that the pull rod 5 and the fastening device 3 can be fixedly connected; when the pull rod 5 and the fastening device 3 are clamped, a keyway is processed on the rear section of the rod body 54, and the fastening device 3 is a key. The key is installed in the keyway and clamped on the lower end surface of the first sleeve 14 and the second sleeve 15, so that the pull rod 5 and the fastening device 3 can be fixedly connected.

[0066] Preferably, if Figure 1 As shown, the fastening device 3 of the present invention is threadedly connected with the pull rod 5, the pull rod 5 is provided with an external thread, and the fastening device 3 is a nut. The present invention adopts a threaded connection method to achieve the connection between the pull rod 5 and the fastening device 3, which can improve the connection strength between the fastening device 3 and the pull rod 5 and facilitate the disassembly of the pull rod 5.

[0067] In order to facilitate the calibration of the displacement of the pull rod 5 and avoid damaging other structures of the blast furnace air supply system connected to the middle sleeve 7, such as Figure 2 As shown, the present invention further comprises a displacement calibration ruler 6, which is mounted on the main beam 4 and has a scale for calibrating the displacement of the reaction beam 1. By setting the displacement calibration ruler 6, the present invention can measure the displacement of the reaction beam 1, thereby obtaining the displacement of the pull rod 5.

[0068] The middle sleeve 7 is located inside the blast furnace air supply system, so there are certain invisible factors when disassembling the middle sleeve 7. Due to manual operation errors or other factors, the towing hook 51 on the pull rod 5 may hook other components except the middle sleeve 7. If the force is still applied to pull at this time, it may cause damage to the blast furnace air supply system. The present invention can monitor the displacement of the pull rod 5 in real time by setting a displacement calibration ruler 6, thereby reducing the damage to the blast furnace air supply system by mistake. That is: during operation, the matching length of the middle sleeve 7 and the large sleeve 8 is known (which can be obtained from the drawings during design). If the displacement distance of the pull rod 5 is greater than the matching length of the middle sleeve 7 and the large sleeve 8, and the middle sleeve 7 still does not fall off, it is judged that there may be a risk of towing error of the towing hook 51 at this time. After inspection, the operation can be carried out to reduce the damage to the blast furnace air supply system.

[0069] In order to facilitate the storage of the displacement calibration ruler 6, Figure 2 and Figure 8 As shown, the displacement calibration ruler 6 of the present invention is rotatably connected to the main beam 4, and the main beam 4 is provided with a first limit block and a second limit block; the first limit block and the second limit block are used to limit the displacement of the displacement calibration ruler 6. The displacement calibration ruler 6 of the present invention rotates along the pin shaft on the main beam 4. When in use, the displacement calibration ruler 6 is moved out from between the first limit block and the second limit block. The displacement calibration ruler 6 is placed vertically due to its own gravity, and the displacement of the reaction beam 1 can be calibrated in real time; when the operation is finished, the displacement calibration ruler 6 can be moved between the first limit block and the second limit block, which is convenient for the storage of the displacement calibration ruler 6.

[0070] Furthermore, in order to facilitate processing and manufacturing, the displacement calibration ruler 6 of the present invention is a steel plate ruler, and the first limit block and the second limit block are convex points formed by spot welding.

[0071] like Figures 1 to 8 As shown, the working process of the present invention is described in detail below:

[0072] When the blast furnace is shut down and the middle sleeve 7 is replaced, after the small sleeve is dragged out, the operator wears labor protection equipment, takes safety precautions, and prepares the main beam 4, tie rod 5, reaction beam 1, hydraulic jack and nuts.

[0073] First, the two tie rods 5 are driven into the middle sleeve 7 by a sledgehammer, and the towing hooks 51 of the two tie rods 5 are hooked on the left and right edges of the middle sleeve 7 respectively; then, the main beam 4 is lifted, the tie rods 5 are passed through the first assembly hole and the second assembly hole on the main beam 4, and the main beam 4 is erected on the outer edge of the large sleeve 8 on the ejector pin column 10 for fixing the middle sleeve 7; finally, two hydraulic jacks are installed, the tie rods 5 are passed through the first sleeve 14 and the second sleeve 15 on the reaction beam 1, and the nuts are tightened so that the hydraulic jacks are close to the reaction beam 1.

[0074] Start the hydraulic jack, and transmit the pulling force to the tie rod 5 through the reaction beam 1, and then drag out the middle sleeve 7, and the removal of the middle sleeve 7 is completed. Before starting the hydraulic jack, rotate the displacement calibration ruler 6 to the vertical position to monitor the displacement of the reaction beam 1 at all times. When the displacement distance of the reaction beam 1 is greater than the matching length of the middle sleeve 7 and the large sleeve 8, but the middle sleeve 7 has not fallen off, check the tie rod 5 before proceeding.

[0075] The use of the present invention can quickly and safely carry out the operation of disassembling the middle sleeve 7, reduce the labor intensity of workers and the occurrence of safety accidents, and greatly improve the operation efficiency.

[0076] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A blast furnace hydraulic power-assisted disassembly device, characterized in that: include: Main beam, tie rod, reaction beam, power assist device and fastening device; The main beam is matched with the large set of blast furnace air supply system to provide an installation position; The booster device is connected to the main beam and in contact with the reaction beam; the pull rod is slidably matched with the main beam and the reaction beam, one end of the pull rod is provided with a towing hook for hooking the outer edge of the end of the sleeve of the blast furnace air supply system, and the other end is inserted through the main beam and the reaction beam and connected to the fastening device; The pull rod is a segmented structure, including a front rod body, a middle rod body and a rear rod body that are connected; the front end of the front rod body is provided with the towing hook; the cross section of the middle rod body is a polygonal structure; the rear rod body is connected to the fastening device; the main beam matches the middle rod body; the reaction beam matches the rear rod body; The upper part of the towing hook is in the shape of a right-angled trapezoid, and the lower part is in the shape of a rectangle. The top edge of the right-angled trapezoid is a blade, and the thickness of the top edge is less than the thickness of the bottom edge of the rectangle. The cross section of the middle rod body is a square structure; the cross sections of the front rod body and the rear rod body are circular structures; The cross-sectional area of ​​the front rod body is larger than that of the middle rod body, the cross-sectional area of ​​the middle rod body is larger than that of the rear rod body, the circular outer contour area of ​​the front rod body is larger than that of the square outer contour area of ​​the middle rod body, the square outer contour area of ​​the middle rod body is larger than that of the circular outer contour area of ​​the rear rod body, the middle rod body matches the main beam, and the rear rod body matches the reaction beam, when the front rod body slides to the main beam, it is stuck by the main beam and cannot go down, or when the middle rod body slides to the reaction beam, it is stuck by the reaction beam and cannot go down; The main beam is a rectangular parallelepiped structure, including a first support plate and a second support plate arranged in parallel, and a first rib plate, a second rib plate, a third rib plate, and a fourth rib plate arranged in parallel; The first rib plate, the second rib plate, the third rib plate, and the fourth rib plate are connected between the first support plate and the second support plate, and are arranged perpendicular to the first support plate and the second support plate; A first assembly hole is provided between the first rib plate and the second rib plate, and a second assembly hole is provided between the third rib plate and the fourth rib plate; there are two pull rods, and the first assembly hole and the second assembly hole are matched with the middle rod body respectively; Also includes: A displacement calibration ruler is installed on the main beam and is provided with a scale for calibrating the displacement of the reaction beam.

2. The blast furnace hydraulic power-assisted disassembly center sleeve device according to claim 1, characterized in that: The main beam further includes a power-assisting positioning plate, which is installed at the bottom ends of the first support plate and the second support plate, and is respectively connected to the first rib plate, the second rib plate, the third rib plate, and the fourth rib plate; The power-assisting positioning plate is provided with a power-assisting positioning groove adapted to the power-assisting device and a through hole adapted to the first assembly hole and the second assembly hole; The through hole is smaller than the first assembly hole and the second assembly hole, and the cross-sectional area of ​​the through hole is larger than the cross-sectional area of ​​the middle section rod body.

3. The blast furnace hydraulic power-assisted disassembly center sleeve device according to claim 1, characterized in that: The reaction beam is a rectangular parallelepiped structure, including a third support plate, a fourth support plate, a first sleeve and a second sleeve; The first sleeve and the second sleeve are connected to the third support plate and the fourth support plate respectively; the third support plate is arranged in parallel with the fourth support plate, the axis of the first sleeve is arranged in parallel with the axis of the second sleeve, and the plane uniquely determined by the axis of the first sleeve and the axis of the second sleeve is parallel to the third support plate and the fourth support plate; The inner diameters of the first sleeve and the second sleeve are larger than the outer diameter of the rear section rod body.

4. The blast furnace hydraulic power-assisted disassembly device according to claim 3 is characterized in that: The reaction beam also includes a reaction bearing plate, which is installed on the top of the third support plate and the fourth support plate and is vertically arranged with the third support plate and the fourth support plate; a power-assisting bearing groove is provided on the reaction bearing plate, and the power-assisting bearing groove is adapted to the power-assisting device.

5. The blast furnace hydraulic power-assisted disassembly device according to claim 1 is characterized in that: The power assist device is any one of a cylinder, a hydraulic cylinder, and a hydraulic jack.

6. The blast furnace hydraulic power-assisted disassembly device according to claim 1, characterized in that: The fastening device and the pull rod are connected by thread, pin or clamp; The fastening device is threadedly connected to the pull rod, the pull rod is provided with an external thread, and the fastening device is a nut.

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